An active control system for suppressing swing and sway behaviors includes a first motor, a rotating plate, a sensor and a controller. The first motor is provided on a to-be-controlled object. The rotating plate is provided on the first motor. The controller is connected to the sensor and the first motor. The sensor is configured to detect a torsional angle of the to-be-controlled object and send the torsional angle to the controller. The controller is configured to process the torsional angle and output a control instruction to the first motor based on a processing result, so as to control the first motor to drive the rotating plate to rotate.
A torque-drive active control system based on principle of rotation includes a first motor, a first rotating shaft, a rotating assembly, a sensor and a controller. The first motor is arranged on a to-be-controlled object. The first rotating shaft is rotatably arranged on the to-be-controlled object. The rotating assembly is arranged on the first rotating shaft. The first motor is drivably connected with the first rotating shaft. The sensor is configured to monitor a torsional angle of the to-be-controlled object, and the controller is configured to process the torsional angle and output instructions to control the first motor to drive the first rotating shaft, so that the first rotating shaft drives the rotating assembly to rotate to generate a torque. The torque is transmitted to the to-be-controlled object through the first rotating shaft to offset the torsional vibration of the to-be-controlled object.
An active-passive hybrid control system for rotational torque includes a first rotating shaft, an elastic reset member, a first rotating member, a first motor, a second rotating member, a sensor and a controller. The first rotating shaft is rotatably arranged on a to-be-controlled object. The elastic reset member is sleevedly arranged on the first rotating shaft. The first rotating member is arranged on the first rotating shaft. A first end of the elastic reset member is connected to the to-be-controlled object, and a second end of the elastic reset member is connected to the first rotating member. The first motor is provided on a side of the first rotating member away from the first rotating shaft. The second rotating member is arranged on the first motor. The controller is connected to the sensor and the first motor.
A grinding and polishing integrated method and apparatus for a diamond wafer. The method comprises: grinding sequentially with a porous ceramic-based diamond grinding wheel, a resin-based diamond grinding wheel, and a chemical reaction grinding wheel in a grinding stage; and polishing sequentially with a diamond abrasive polishing solution, an alumina abrasive polishing solution, and a titanium dioxide abrasive polishing solution in a polishing stage. The grinding and polishing integrated apparatus comprises a Z-axis feeding device (1), an X-axis reciprocating device (2), a hollow rotating spindle assembly (3), a polishing disc assembly (4), a marble platform (6), a waste liquid pool (7), and a human-machine interaction and control module (8). By means of grinding and polishing in stages, surface roughness of the diamond wafer is reduced step by step, and efficient and ultra-smooth polishing of the diamond wafer of 50-220 mm is implemented, so that an ultra-smooth and flat surface of Ra0.001 can be obtained.
B24B 7/22 - Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfacesAccessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground for grinding inorganic material, e.g. stone, ceramics, porcelain
B24B 47/20 - Drives or gearings for grinding machines or devicesEquipment therefor relating to feed movement
B24B 37/20 - Lapping pads for working plane surfaces
5.
Image processing method and system for improving three-dimensional display effect of blood vessels
According to an image processing method and system for improving three-dimensional display effect of blood vessels provided by the present invention, the image processing method comprises the following steps: design an interpolation algorithm to preprocess the original data to obtain a preprocessed image based on the original image volume data before projection; determine the blood vessel trend according to the preprocessed image, eliminate isolated points, and perform image smoothing processing on the blood vessel trend to obtain a smooth image; and process the smooth image by a nonlinear change method to perform nonlinear enhanced display of blood vessels and suppress the background. And improve the display effect of blood vessel signals.
A tunnel dynamic blasting device based on geological body intelligent perception, a system and a method are provided. A blasting design instrument body of the tunnel dynamic blasting device is disposed with a 3D laser scanning device, a digital camera device, a borehole locating device, an electronic screen, a built-in computer and a wireless communication device. The 3D laser scanning device, the digital camera device, the borehole locating device, the electronic screen and the wireless communication device are connected to the built-in computer. A housing of the blasting design instrument body is disposed with a battery compartment having a lithium battery secured therein. A range finder is secured above the housing. Problems of non-systematicness and lag of tunnel blasting design and coarseness of borehole locating nowadays are solved, thus the tunnel excavation efficiency and borehole arrangement accuracy in the tunnel cross-section are improved, thereby improving the tunnel blasting quality.
E21D 9/14 - Layout of tunnels or galleriesConstructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
F42D 3/04 - Particular applications of blasting techniques for rock blasting
F42D 99/00 - Subject matter not provided for in other groups of this subclass
G06F 30/20 - Design optimisation, verification or simulation
A tensegrity offshore wind power generation support structure is provided, relating to the technical field of offshore wind power. The support structure includes inclined columns, prestressed cables, a rigid support, a floating foundation and anchoring systems. A stable self-balancing space supporting structure is formed by the inclined columns and the cables; the inclined columns inclines outwards, upper parts of the inclined columns are connected with the prestressed cables; the bottom ends of the inclined columns are connected with the floating foundation; the middle parts of the inclined columns are connected with the rigid support; and the floating foundation is fixed with a seabed through the anchoring systems. According to the support structure, a tower in the traditional design is not needed, and all the cables are ensured to be in a tension state through the support of the inclined columns.
A permanent magnet motor with a high-efficiency air-water mixed cooling system is provided. An inner circumference of a stator core of the permanent magnet motor is provided with multiple stator slots along a circumferential direction, armature windings are arranged in the stator slots, an outer circumference of the stator core is provided with multiple axial ventilation channels along an axial direction and a radial ventilation channel along a radial direction. The radial ventilation channel is communicated with the axial ventilation channels and contacts with a rotor core. Stator water-cooling discs are arranged at both ends of the stator core. A casing is provided with an air inlet communicated with the radial ventilation channel, multiple air outlets communicated with the axial ventilation channels, casing water-cooled water inlets and casing water-cooled water outlets. The casing water-cooled water inlets and the casing water-cooled water outlets are both communicated with the stator water-cooling discs.
H02K 9/193 - Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil with provision for replenishing the cooling mediumArrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil with means for preventing leakage of the cooling medium
H02K 3/28 - Layout of windings or of connections between windings
H02K 3/48 - Fastening of windings on the stator or rotor structure in slots
H02K 5/20 - Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
H02K 9/10 - Arrangements for cooling or ventilating by gaseous cooling medium flowing in closed circuit, a part of which is external to the machine casing
9.
LASER CLEANING APPARATUS FOR CLEANING INNER WALL OF OIL PIPELINE
A laser cleaning apparatus for cleaning the inner wall of an oil pipeline, the apparatus comprising a pipeline (1), a traveling structure (2), a driving structure (3), a cleaning structure (4), a dust removal structure (5), and a supporting housing (6). The driving structure (3) is provided in the inner cavity of the supporting housing (6); the traveling structure (2) is connected to one end of the driving structure (3); the traveling structure (2) and the supporting housing (6) are both in contact with the inner side wall of the pipeline (1), so as to enable the driving structure (3) to drive the traveling structure (2) to move on the inner side of the pipeline (1); the driving structure (3) is connected to the cleaning structure (4), so as to enable the driving structure (3) to drive the cleaning structure (4) to rotate and clean the inner side wall of the pipeline (1); the dust removal structure (5) is provided on the pipeline (1); and the traveling structure (2) comprises a transmission shaft (20), a rotating shaft core (21), a plurality of traveling wheel flaps (22), a plurality of supporting rods (23), a sleeve (25), a plurality of wheel diameter adjusting claws (26), threaded rods (27), and an adjusting nut (28).
B08B 9/051 - Cleaning the internal surfacesRemoval of blockages using cleaning devices introduced into and moved along the pipes having self-contained propelling means for moving the cleaning devices along the pipes the cleaning devices having motors for powering cleaning tools
B08B 9/032 - Cleaning the internal surfacesRemoval of blockages by the mechanical action of a moving fluid, e.g. by flushing
B08B 7/00 - Cleaning by methods not provided for in a single other subclass or a single group in this subclass
B08B 7/02 - Cleaning by methods not provided for in a single other subclass or a single group in this subclass by distortion, beating, or vibration of the surface to be cleaned
B08B 15/04 - Preventing escape of dirt or fumes from the area where they are producedCollecting or removing dirt or fumes from that area from a small area, e.g. a tool
10.
TEST SYSTEM FOR HIGH-SPEED-TRAIN LATERAL ROLLING ADVERSE DYNAMIC BEHAVIOR SIMULATION AND ACTIVE CONTROL THEREOF
Disclosed in the present invention is a test system for high-speed-train lateral rolling adverse dynamic behavior simulation and active control thereof. The test system comprises a bearing device, a train device, a processing device and an adjustment device, wherein the train device is arranged on the bearing device; the bearing device is used for causing the train device to perform a lateral rolling motion; the processing device is connected to the adjustment device; the processing device and the adjustment device are both arranged on the train device; a plane where the adjustment device is located and a plane where the train device is located have an included angle; the processing device is used for acquiring data of the lateral rolling motion of the train device and controlling the adjustment device according to the data; and the adjustment device outputs to the train device a torque opposite to the direction of the lateral rolling motion of the train device, so as to adjust the lateral rolling motion of the train device. By means of effectively simulating a lateral rolling motion of a train, and controlling the lateral rolling motion of the train, the lateral rolling motion of the train is effectively reduced.
Disclosed is an active-passive composite control system for preventing swinging of a suspended object, comprising a passive force output mechanism and an active force output mechanism. The passive force output mechanism is used to connect to an object to be controlled, and the passive force output mechanism is also used to, when the object to be controlled moves laterally, apply a force opposite to the lateral movement direction of the object to be controlled to the object to be controlled, so as to inhibit the lateral movement of the object to be controlled. The active force output mechanism comprises a driving part and a rotating part, the driving part being disposed on the object to be controlled, the rotating part being connected to the driving part, and the driving part being used to drive the rotating part to rotate when the object to be controlled rotates, so that the rotating part generates a torque opposite to the rotation direction of the object to be controlled and transmits the torque to the object to be controlled by means of the driving part, so as to inhibit the rotation of the object to be controlled. The present invention can simultaneously inhibit lateral movement of the object to be controlled within a plane, and rotation thereof in space.
The present invention discloses an active-passive composite rotary torque control system, comprising a first rotating shaft, an elastic return member, a first rotating member, a first motor, a second rotating member, a sensor, and a controller. The first rotating member can rotate relative to an object to be controlled by means of the first rotating shaft. The first rotating member may rotate in a direction opposite to a torsion direction of the object to be controlled under the action of the object to be controlled, so that the first rotating member can generate a torque that counteracts torsional vibration of the object to be controlled. The sensor measures a torsion angle of the object to be controlled and sends the torsion angle to the controller, and the controller processes the received torsion angle and outputs a corresponding control instruction to the first motor according to a processing result, so as to control the first motor to drive the second rotating member to rotate, and cause the second rotating member to generate a torque, the torque being transmitted to the first rotating member by means of the first motor, so as to accelerate rotation of the first rotating member. Thus, the first rotating member can quickly generate a torque that counteracts the torsional vibration of the object to be controlled.
Disclosed in the present invention is an active control system for shake reduction and swing prevention of an engineering structure or a mechanical system. The active control system comprises a first electric motor, a rotary plate, a sensor and a controller, wherein the first electric motor is configured to be arranged on an object to be controlled; the rotary plate is arranged on the first electric motor; and the controller is connected to the sensor and the first electric motor. The torsional angle of the object to be controlled is measured by means of the sensor and is sent to the controller, and then the controller processes the received torsional angle and controls the first electric motor to drive the rotary plate to rotate according to a processing result, so that the rotary plate generates torque that counteracts torsional vibration of the object to be controlled. The torque generated by the rotary plate is transferred to the object to be controlled by means of the first electric motor to counteract the torsional vibration generated by the object to be controlled, thereby improving the stability of the object to be controlled.
Disclosed in the present invention is an active/passive hybrid control system for suppressing multi-modal coupled vibrations of a bridge. A first sliding member moves, under the action of an object to be controlled, in a direction opposite to the operating direction of said object, such that the first sliding member generates a force for canceling the vertical vibrations of said object; and the first sliding member transmits the force to said object, thereby canceling the vertical vibrations generated by said object. A second sliding member moves, under the action of said object, in the direction opposite to the operating direction of said object, such that the second sliding member generates a force for canceling the transverse vibrations of said object; and the second sliding member transmits the force to said object, thereby canceling the transverse vibrations generated by said object. A rotating member rotates, under the action of said object, in a direction opposite to the twisting direction of said object, such that the rotating member generates a torque for canceling the torsional vibrations of said object; and the rotating member transmits the torque to said object, thereby canceling the torsional vibration generated by said object.
E04B 1/98 - Protection against other undesired influences or dangers against vibrations or shocksProtection against other undesired influences or dangers against mechanical destruction, e.g. by air-raids
15.
ACTIVE TORQUE DRIVING CONTROL SYSTEM BASED ON GYRATION PRINCIPLE
The present invention discloses an active torque driving control system based on a gyration principle, comprising a first motor, a first rotating shaft, a rotating assembly, a sensor, and a controller. The first motor is used to be disposed on an object to be controlled, the first rotating shaft is rotatably disposed on the object to be controlled, the rotating assembly is disposed on the first rotating shaft, and the first motor has transmission connection with the first rotating shaft. First, the sensor measures a torsion angle of the object to be controlled, and the controller processes the received torsion angle and outputs a corresponding control instruction to the first motor according to a processing result, so as to control the first motor to drive the first rotating shaft to rotate, so that the first rotating shaft drives the rotating assembly to rotate, and the rotating assembly can generate a torque that counteracts torsional vibration of the object to be controlled. The torque generated by the rotating assembly is transmitted to the object to be controlled by means of the first rotating shaft, so as to counteract torsional vibration generated by the object to be controlled, and thereby improve the stability of the object to be controlled.
A control system for an unfavorable swing behavior of an object hanging from high altitude. The control system comprises a passive force output mechanism (1) and/or an active force output mechanism (2). The passive force output mechanism (1) can generate moment opposite a rotation direction of an object to be controlled (100) when said object (100) rotates, and can transmit the moment to said object (100), so as to inhibit the rotation of said object (100). The active force output mechanism (2) comprise a driving member (21) and a second rotating member (22), wherein the second rotating member (22) is arranged on said object (100); and the driving member (21) is used for driving the second rotating member (22) to rotate when said object (100) rotates, such that the second rotating member (22) generates moment opposite the rotation direction of said object (100), and transmits the moment to said object (100), so as to inhibit the rotation of said object (100).
A stator liquid cooling structure and a stator structure of a stator yokeless disc motor are provided. The cooling structure includes an annular stator bracket and a water jacket. An outer periphery of the stator bracket is in a groove structure and is fixedly connected with the water jacket. Opposite upper and lower ends of the water jacket are provided with a liquid inlet and a liquid outlet. The stator structure includes stator cores, an armature winding, the stator bracket and the water jacket. A first stator core and a second stator core of the stator cores are same in structure and oppositely arranged. The armature winding is wound on first stator tooth bodies and second stator tooth bodies of the stator cores; the first stator tooth bodies and the second stator tooth bodies are inserted into gaps between adjacent blade-shaped cavities and fixed on the stator bracket.
The present invention relates to a mechanism- and data driving-based engine cylinder head milled surface quality prediction method, belonging to the technical field of automated prediction. The method comprises the following steps: determining a key evaluation index and key influence factors for cylinder head milled surface quality; collecting process parameters and a surface roughness value; on the basis of a cylinder head milling mechanical state, constructing milling force and heat mechanism models based on a semi-analytical method and a heat source method; acquiring state variable data, preprocessing same and storing same in a historical database; constructing a surface roughness prediction model based on SVR optimized by an ADE algorithm, the process parameters and the state variable data outputted by the mechanism models being taken as an input of a data driving model and a surface roughness value being taken as an output thereof, and performing training by means of historical data to obtain an SVR optimal parameter combination; and, by means of real-time process parameters and the state variable data outputted by the mechanism models, predicting a milled surface roughness. The method has the advantages of high model state characterization capability and low state variable data acquisition cost, and can realize accurate prediction of cylinder head milled surface quality.
G06F 30/17 - Mechanical parametric or variational design
G06F 30/27 - Design optimisation, verification or simulation using machine learning, e.g. artificial intelligence, neural networks, support vector machines [SVM] or training a model
19.
LOW-CARBON MODELING AND PROCESS PARAMETER OPTIMIZATION METHOD FOR CLEANING PROCESS OF LASER CLEANING DEVICE
A low-carbon modeling and process parameter optimization method for a cleaning process of a laser cleaning device. The method comprises the following steps: establishing a carbon emission model for a laser cleaning process, and building a real-time carbon emission monitoring platform for the laser cleaning process; applying a regression fitting and laser cleaning test to acquire parameters of the carbon emission model; by means of aiming at carbon emissions and taking quality objectives such as roughness, carbon content and oxygen content into comprehensive consideration, establishing a multi-objective laser cleaning process parameter optimization model, proposing a laser cleaning process parameter optimization model solving algorithm based on a multi-objective evolutionary algorithm of a coevolution framework, obtaining optimal laser cleaning process parameters, and realizing a green and low-carbon laser cleaning process. The method solves the problem of a large amount of carbon emissions caused by the incomplete absorption of heat and the incomplete conversion of electric energy in a laser cleaning process, can effectively reduce carbon emissions in the laser cleaning process on the basis of ensuring the cleaning quality, and is of great significance for the green and high-quality development of the operation and maintenance and re-manufacturing of high-end devices.
A multi-stage gas atomization preparation method of titanium alloy spherical powder for a 3D printing technology includes the following steps: bar preparation and machining step, multi-stage gas atomization powder preparation step through vacuum induction, and powder screening step. The collision probability of the metal droplets at the gas atomization stage is reduced by controlling the gas atomization pressure and the feeding speed of the titanium alloy electrode bar in a hierarchical manner, so that the collaborative control of the particle size and the surface quality of the titanium alloy 3D printing powder in the gas atomization preparation process is realized.
B22F 9/08 - Making metallic powder or suspensions thereofApparatus or devices specially adapted therefor using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
B33Y 70/00 - Materials specially adapted for additive manufacturing
The present application relates to a bidirectional digital switching power amplifier based on a magnetic suspension drive platform and its multi-step current predictive control method. The control method includes the following steps: establishing a prediction model of a bidirectional digital switching power amplifier; introducing a feedback correction term for a closed loop prediction; calculating an optimal modulation duty cycle through a value function; generating, according to the obtained modulation duty cycle, four PWM drive signals by a pulse width modulation module to control four switch tubes respectively to achieve current prediction control. The present application effectively improves the system control accuracy with small steady-state error, small on-line computation amount, simple algorithm, easy digital realization, and good practical value and application prospect.
H02M 3/157 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators with digital control
H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
H02M 1/088 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
22.
Wire harness wall-passing structure and installation method thereof
LIAONING WUHUAN SPECIAL MATERIALS AND INTELLIGENT EQUIPMENT INDUSTRY TECHNOLOGY RESEARCH INSTITUTE CO., LTD (China)
Inventor
Zhao, Jing
Cui, Jianzheng
Wang, Shijie
Zhang, Qingyu
Zhang, Junfei
Zhang, Xianwei
Abstract
A wire harness wall-passing structure and an installation method thereof. The wire harness wall-passing structure comprises: a sleeve pipe, a pouring sealant, and at least one sealing plug, wherein the sleeve pipe is alternately filled with the pouring sealant and the sealing plug along the axis direction of the sleeve pipe; and at least one first through hole formed in the sealing plug, and a wire harness which can penetrate through the pouring sealant and the first through hole in the sealing plug. According to the wire harness wall-passing structure, the sleeve pipe is filled with the pouring sealant and the sealing plug, so multi-stage sealing and multi-time sealing of the wire harness are achieved, the sealing performance of the wall-passing structure is greatly improved, and the wire harness wall-passing structure is more suitable for to-be-fixed devices such as a high pressure vessel.
CHINA RAILWAY CONSTRUCTION BRIDGE ENGINEERING BUREAU GROUP CO., LTD. (China)
Shenyang University of Technology (China)
Inventor
Zhao, Jian
Liu, Peng
An, Luming
Chen, Yixuan
Zhou, Guannan
Wang, Yuanqing
Fan, Lilong
Zhang, Pengzhi
Liu, Yintao
Lu, Hongping
Ji, Xianyu
Abstract
The present application belongs to the technical field of bridge engineering, and particularly relates to a structure for relieving cracking of a steel bridge deck. The structure for relieving cracking of a steel bridge deck comprises a steel bridge deck and a plurality of U-ribs welded and fixed to a bottom of the steel bridge deck, and further inventions an iron-based shape memory alloy (Fe-SMA) fixing unit, a filling unit, a structural layer, and a test wire. A Fe-SMA having a restoration capability in the case of heating is used and formed into a honeycomb structure to greatly reduce an amplitude of fatigue stress and an influence of fatigue cracking of a welding part on the bridge deck.
CHINA RAILWAY CONSTRUCTION BRIDGE ENGINEERING BUREAU GROUP CO., LTD. (China)
Shenyang University of Technology (China)
Inventor
Zhao, Jian
Liu, Peng
An, Luming
Lu, Hongping
Zhou, Guannan
Wang, Yuanqing
Fan, Lilong
Chen, Gang
Chen, Meiyu
Chen, Yixuan
Ji, Xianyu
Abstract
The present invention relates to the technical field of bridges, and specifically discloses a bridge sling based on electrochemical detection on steel wire corrosion. By means of winding a steel wire bundle with a wrapping tape, and coating the wrapping tape with a shielding coating, the steel wire bundle and the shielding coating are electrically connected with positive and negative electrodes of a voltage test assembly respectively, so that simple and accurate detection on corrosion in the sling during service is realized, and the safety of the sling during the service is ensured.
CHINA RAILWAY CONSTRUCTION BRIDGE ENGINEERING BUREAU GROUP CO., LTD. (China)
Shenyang University of Technology (China)
Inventor
Liu, Peng
Zhao, Jian
An, Luming
Ji, Xianyu
Wang, Yuanqing
Zhou, Guannan
Fan, Lilong
Ren, Yanlong
Wang, Lei
Lu, Hongping
Chen, Yixuan
Abstract
The present invention provides a high-pressure bearable scale type bridge rubber bearing, comprising spring rubber vibration reduction pad assemblies, a flexible steel plate assembly and a rubber bearing body. The rubber bearing body comprises an outer rubber portion and an inner rubber portion; the outer rubber portion is wrapped around the outside of the spring rubber vibration reduction pad assemblies and the flexible steel plate assembly; the spring rubber vibration reduction pad assemblies are arranged on the upper side and the lower side of the inner rubber portion; and the flexible steel plate assembly is fixedly mounted between the spring rubber vibration reduction pad assemblies. The rubber bearing of the present invention has a relatively large elastic deformation after being loaded and can effectively conduct vibration reduction and earthquake resistance during use.
CHINA NORTHEAST ARCHITECTURAL DESIGN & RESEARCH INSTITUTE CO., LTD (USA)
CHINA CONSTRUCTION TECHNOLOGY GROUP CO., LTD (USA)
SHENYANG UNIVERSITY OF TECHNOLOGY (USA)
CHINA WEST CONSTRUCTION BUILDING MATERIALS SCIENCE RESEARCH INSTITUTE CO., LTD (USA)
Inventor
Gu, Xiaowei
Zhang, Xinlong
Wang, Hao
Gao, Yuxin
Li, Xiaohui
Zhang, Weifeng
Li, Zhangmiao
Liu, Jianping
Liu, Qingdong
Ning, Baokuan
Liu, Peng
Abstract
The present disclosure relates to the technical field of solid waste recycling and fabricated buildings, and provides a solid waste large-mixing-amount concrete prefabricated laminated slab and a preparation method thereof. The solid waste large-mixing-amount concrete prefabricated laminated slab provided by the present disclosure comprises a prefabricated layer and a laminated layer. Transverse grooves and longitudinal grooves are formed in the surface of the prefabricated layer. During application, the grooves can be used for erecting pipelines, the contact area of the prefabricated layer and the laminated layer can also be increased, the combined effect of new concrete and old concrete is improved, the integrity of a floor slab is enhanced, and the effect of improving the overall stress capacity of the floor slab is achieved.
B28B 1/08 - Producing shaped articles from the material by vibrating or jolting
B28B 11/24 - Apparatus or processes for treating or working the shaped articles for curing, setting or hardening
B28B 13/06 - Removing the shaped articles from moulds
C04B 28/02 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
B28B 23/22 - Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material wherein the elements are reinforcing members assembled from preformed parts
27.
Method for quickly predicting fatigue life of wrinkle defect-containing main spar in wind turbine blade
A method for quickly predicting a fatigue life of a wrinkle defect-containing main spar in a wind turbine blade is provided. The method includes: S1: testing a tensile property of a wrinkle defect-containing main spar to be tested; S2: calculating, according to surface temperature data of the specimen obtained in step S1, intrinsic dissipated energy of the main spar specimen under different loading stresses; S3: plotting a relational graph between intrinsic dissipated energy of the specimen and a corresponding ultimate tensile strength (UTS) level; S4: establishing, based on a change of the intrinsic dissipated energy in a fatigue process, a normalized residual stiffness model containing parameters to be determined, and putting fatigue test data into the model; S5: deducing a fatigue life prediction model for the wrinkle defect-containing main spar specimen according to the normalized residual stiffness model with determined parameters; and S6: obtaining a normalized failure stiffness.
LIAONING WUHUAN SPECIAL MATERIALS AND INTELLIGENT EQUIPMENT INDUSTRY TECHNOLOGY RESEARCH INSTITUTE CO., LTD (China)
Inventor
Zhao, Jing
Cui, Jianzheng
Wang, Shijie
Zhang, Qingyu
Zhang, Junfei
Zhang, Xianwei
Abstract
The present application relates to the technical field of electrical devices, and in particular, to a wiring harness through-wall structure and an installation method thereof. The wiring harness through-wall structure comprises a sleeve, a potting adhesive, and at least one sealing plug; along the axis direction of the sleeve, the sleeve is alternately filled with the potting adhesive and the sealing plug; the sealing plug is provided with at least one first through hole; a wiring harness can penetrate through the potting adhesive and the first through hole of the sealing plug. According to the wiring harness through-wall structure provided by the present application, by filling the sleeve with the potting adhesive and the sealing plug, multi-stage sealing and multiple sealing of a wiring harness are achieved, the sealing performance of the through-wall structure is greatly improved, and the wiring harness through-wall structure is more suitable for a device to be fixed, for example, a high-pressure container.
CHINA ELECTRIC POWER RESEARCH INSTITUTE COMPANY LIMITED (China)
Inventor
Chen, Weijiang
Zhong, Jianying
Li, Haiwen
Lin, Shen
Han, Bin
Liu, Yu
Han, Guohui
Lei, Qin
Liu, Yu
Duan, Xiaohui
Wei, Jianwei
Sun, Keke
Li, Xingang
Abstract
A hydraulic control valve, a hydraulic operating mechanism using the hydraulic control valve, and a circuit breaker. The hydraulic control valve comprises a valve body (1), which is internally provided with a valve cavity (3), and a constant high-pressure oil port (4), a control oil port (5) and a constant low-pressure oil port (6) which communicate with the valve cavity (3) are sequentially disposed on the valve body (1) along a linear direction. The hydraulic control valve is further provided with a valve core (9); a straight section of equal diameter is provided on an inner wall of the valve cavity (3) between the constant high-pressure oil port (4) and the constant low-pressure oil port (6); a sealing ring (10) is provided on at least one of the outer peripheral surface of the valve core (9) and on an inner wall of the the straight section of equal diameter, so as to achieve sliding sealing cooperation between the valve core (9) and the straight section of equal diameter. A first limit position and a second limit position are provided on a reciprocating sliding stroke of the valve core (9); when located in the first limit position, the valve core (9) is located between the constant high-pressure oil port (4) and the control oil port (5), and the constant low-pressure oil port (6) communicates with the control oil port (5); and when located in the second limit position, the valve core (9) is located between the constant low-pressure oil port (6) and the control oil port (5), and the constant high-pressure oil port (4) communicates with the control oil port (5). Requirements for the position of the valve core (9) after moving into position are not too strict, and a certain position deviation is permitted, thus reducing the difficulty of processing and assembling.
F16K 11/065 - Multiple-way valves, e.g. mixing valvesPipe fittings incorporating such valvesArrangement of valves and flow lines specially adapted for mixing fluid with all movable sealing faces moving as one unit comprising only sliding valves with linearly sliding closure members
F15B 13/02 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
The present application relates to a magnetic levitation driving platform-based bidirectional digital switching power amplifier and a multi-step current prediction control method thereof. The control method comprises the following steps: establishing a prediction model of the bidirectional digital switching power amplifier; introducing a feedback correction item, and performing closed-loop prediction; solving an optimal modulation duty ratio by means of a value function; and according to the obtained modulation duty ratio, respectively generating four paths of PWM driving signals by means of a pulse width modulation module to control four switching tubes, thereby achieving current prediction control. The present application effectively improves the system control precision, is small in steady-state error, small in online calculation amount, simple and convenient in algorithm, and easy in digitalization, and has good practical values and application prospects.
H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
H02M 3/157 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators with digital control
H02M 1/088 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
31.
HYDRAULIC OPERATING MECHANISM AND HYDRAULIC CONTROL VALVE
A hydraulic operating mechanism and a hydraulic control valve. The hydraulic operating mechanism comprises a working cylinder and the hydraulic control valve; the hydraulic control valve comprises a valve body, a valve core (4), and a driving rod (15); a left moving area (11) and a right moving area (12) are provided in the valve body; the driving rod (15) is disposed corresponding to the end surface of the valve core (4) and used for pushing and/or pulling, under the driving of a driving module (5), the valve core (4) to act; a left moving area channel (13) and a right moving area channel (14) are formed on the valve body and/or the valve core (4); if the effective end surface area of the valve core (4) exposed in a left valve core moving area (11) is A1, the effective end surface area of the valve core (4) exposed in a normal high pressure oil area (8) when the valve core (4) moves rightwards to a limit position is A2, the effective end surface area of the valve core (4) exposed in a working oil area (7) when the valve core (4) moves leftwards to a limit position is A3, and the effective end surface area of the valve core exposed in the right moving area (12) is A4, A1 is larger than A2, and A1 is smaller than A3 plus A4. The solution can solve the problems that hydraulic control valves of existing hydraulic operating mechanisms are inconvenient to install and maintain and have high costs.
Shenyang Daxingcheng Energy Technology Co., Ltd (China)
Inventor
Zhou, Bo
Abstract
The invention relates to the technical field of operation and maintenance of wind turbines, and is also applicable to non-destructive measurement of a depth of a defect of other resin-based composite materials. It is aimed at the problem that the depth of the defect cannot be determined by an intuitive infrared thermal image in the measurement of a depth of a defect of a large wind turbine blade. This method not only ensures accuracy of the measurement, but can also be widely applied. The method comprises the following steps: S1: continuously heating a surface of a wind turbine blade with an irradiation heat source; S2: collecting and storing a real-time heat map sequence of a surface of the blade with an NEC R300 infrared thermal imaging camera; S3: extracting a surface temperature rise curve at a defect location and organizing the results into a temperature rise curve family of the layers in a depth direction at the defect location; S4: extracting a surface temperature rise curve at a non-defect location, and calculating the similarity between the two temperature rise curve families; S5-S7: obtaining a reference depth value of the defect; and S8: determining whether the depth value is in a characteristic interval.
A transformable robot with two wheeled legs having an autonomous navigation and travel function comprises a transformable mechanical body (1) and an autonomous navigation and travel system (2). The autonomous navigation and travel system is located on the transformable mechanical body. The autonomous navigation and travel system comprises a control system (3), a power system (4), a power supply system (118), an interaction system (5), a wireless communication system (6), and a satellite-based positioning system (7). The control system is electrically connected to the power system, the interaction system, the power supply system, the wireless communication system, and the satellite-based positioning system. If the device is used as a public bicycle, after a cyclist reaches a destination, the robot transforms from a bicycle to a robot with two wheeled legs, and then can autonomously return, thereby meeting a requirement of a user to park freely, and eliminating the impact of arbitrary parking on the environment. If the device is used as a private bicycle, after a cyclist reaches a destination, the robot transforms from a bicycle to a robot with two wheeled legs, which can then autonomously follow its master.
An intelligent cooperative control system for a multi-unit permanent magnet synchronous motor, comprising a double parallel PWM rectification circuit (1), a first permanent magnet motor cooperative control unit (2), a second permanent magnet motor cooperative control unit (3), a third permanent magnet motor cooperative control unit (4) and a multi-unit permanent magnet synchronous motor (5), wherein the first permanent magnet motor cooperative control unit (2), the second permanent magnet motor cooperative control unit (3) and the third permanent magnet motor cooperative control unit (4) cooperatively control three stator units of the multi-unit permanent magnet synchronous motor (5) in a parallel connection manner. By means of the system, the problems of energy loss and reactive power loss of a hard switching circuit in a large power electric drive system can be solved, the problems of multi-unit cooperative control and fault tolerant control can be solved, the problems of difficult motor installation, transport and maintenance can be solved, the total energy is optimized, and the purpose of improving the utilization efficiency of the electric energy is achieved.
A double-auxiliary-resonant-pole type three-phase soft switching inverter circuit and a modulation method therefor. The circuit comprises three-phase main inverter circuits and three-phase double-auxiliary-resonant commutation circuits, wherein the phase-A double-auxiliary-resonant commutation circuit (1), the phase-A main inverter circuit (2), the phase-B double-auxiliary-resonant commutation circuit (3), the phase-B main inverter circuit (4), the phase-C double-auxiliary-resonant commutation circuit (5) and the phase-C main inverter circuit (6) are sequentially connected in parallel and are connected to a DC power source (E) in parallel, and all main switching tubes work according to the modes of sine pulse width modulation and complementary switch-on with a phase difference being 180 degrees. By means of the circuit and the modulation method therefor, separation of resonance current of the double-auxiliary-resonant commutation circuits and load current at the current commutation time can be achieved, current stress of auxiliary switching tubes is effectively lowered, and by avoiding superposition of load current and resonance current at the current commutation time, loop current loss of the double-auxiliary-resonant commutation circuits can be effectively lowered, and especially the efficiency can be greatly improved under the light load condition.
H02M 7/537 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
36.
METHOD FOR ACTIVELY OPTIMIZING, ADJUSTING AND CONTROLLING DISTRIBUTED WIND POWER PLANT PROVIDED WITH ENERGY-STORAGE POWER STATION
STATE GRID LIAONING ELECTRIC POWER RESEARCH INSTITUTE (China)
SHENYANG UNIVERSITY OF TECHNOLOGY (China)
Inventor
Xing, Zuoxia
Wang, Wenjie
Yang, Junyou
Liu, Jinsong
Li, Yuting
Jiang, Libing
Cui, Jia
Wang, Haixin
Abstract
A method for actively optimizing, adjusting and controlling a distributed wind power plant provided with an energy-storage power station, which relates to the constraint of the wind power grid access guide rule on the upper and lower limits of the active power output, setting a constraint condition by the maximum and minimum limit values of single power generation, and establishing the constraint condition of the active power output according to the single power generation characteristics of the wind power and energy-storage power supply. In accordance with the external conditions of the operation of the wind power plant, the operation is divided into a power rationed operation and non-power rationed operation, wherein the power rationed operation has the optimization objectives that the variable pitch control load and line loss are minimal and the frequency fluctuation is minimal; and the non-power rationed operation has the optimization objectives that the maximum wind energy capture rate and line loss are minimal and the frequency fluctuation is minimal, and uses a multi-objective layered optimization problem as an objective function. A particle swarm algorithm is used to obtain a solution, so that the wind power active power consumption which is output by the action of an energy-storage system minimizes the stable output, thereby achieving the effective joining of the energy-storage system with the existing scheduling operation mode, and achieving the best economic benefit at the same time.
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