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31.发明申请公开(公告)号：US20220084732A1
公开(公告)日：2022-03-17
申请号：US17355639
申请日：2021-06-23
Applicant: Hunan University of Science and Technology
Inventor： Zhao-Hua Liu , Qi-Wei Xia , Chang-Tong Wang , Lei Chen , Zhu Zhang , Hong-Qiang Zhang , Xiao-Hua Li
IPC: H01F13/00 , G06N20/00 , G06N3/04 , G01R31/34 , H02P29/032
Abstract: A PMSM demagnetization fault diagnosis method based on fuzzy intelligent learning of torque signals, which includes the following steps of: acquiring torque ripple signals of permanent magnet synchronous motors under different demagnetization faults; calculating a fuzzy membership of the torque ripple signals; decomposing and reconstructing the torque ripple signals by using wavelet packet decomposition to obtain wavelet packet coefficients; calculating the energy of the wavelet packet coefficients, constructing a feature vector sample set with the fuzzy membership, and dividing it into a training set and a test set; constructing Fuzzy Extreme Learning Machine (FELM), and inputting the training set into the FELM for training; inputting the test set into the trained FELM, and calculating classification accuracy. The disclosure solves the problem of unbalanced and irregular training sample distribution by integrating fuzzy theory into the Extreme Learning Machine to fuzzify the torque ripple signal samples under demagnetization fault.
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公开(公告)号：US11275191B2
公开(公告)日：2022-03-15
申请号：US16226611
申请日：2018-12-19
Applicant: Hunan University of Science and Technology
Inventor： Cailun Huang , Jing Wang , Yongjun Tian , Kai Sun , Li Ouyang , Kaixuan Zhang , Xiongsheng Yi
Abstract: Disclosed are a method and system of magnetotelluric synchronous detection and real-time inversion. The system includes a detection and inversion host (M) with wireless networking function and N2-1 detection and inversion extensions (Si) with wireless communication functions. The distance between each two detection and inversion extensions (Si) is D, i=1, 2, . . . , N2-1, and N is an odd number. The detection and inversion host is configured for collecting magnetic field signals and electric field signals at measurement points, wireless networking and cooperation, synchronous detection and real-time inversion control of the detection and inversion extensions (Si) in detection area. The detection and inversion extensions (Si) are configured for synchronous collection of electric field signals at measurement points and real-time inversion of detection data at measurement points under cooperative control of the detection and inversion host.
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公开(公告)号：US10927606B2
公开(公告)日：2021-02-23
申请号：US16731060
申请日：2019-12-31
Applicant: Hunan University of Science and Technology
Inventor： Buyan Wan , Yongping Jin , Xiaojun Huang , Jialiang Wang
Abstract: Disclosed is a sediment core-drilling process for a submarine wire-line coring drill rig, including 1) lowering the drill rig; 2) drilling in a pressure-suction mode; 3) drilling in a rotation-pressure-suction mode; 4) cutting sediment cores; 5) recovering a core inner tube; 6) cleaning bottom of hole; 7) punching before adding a drill pipe; 8) lowering another core inner tube; 9) adding the drill pipe; 10) punching after adding the drill pipe; 11) repeating the steps 2)-10) until a given hole depth is reached; 12) recovering the drill pipe and a wire-line coring outer tube drilling tool; 13) recovering the submarine wire-line coring drill rig. The core-drilling process provided herein is suited to working conditions without mud lubrication and mud protection for hole wall. This invention has advantages of low disturbance and high efficiency in coring and is suitable for remote operation.
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公开(公告)号：US20210040800A1
公开(公告)日：2021-02-11
申请号：US16876737
申请日：2020-05-18
Applicant: Hunan University of Science and Technology
Inventor： Buyan WAN , Yongping JIN , Deshun LIU , Xiaojun HUANG
IPC: E21B19/14
Abstract: A support device for the rotation of a high-capacity and compact drill pipe storage unit of a seabed drilling rig in a lying state, including: a rack, a plurality of curved support frames, a plurality of lateral drill pipe stoppers and a plurality of annular fences. The curved support frames are provided parallelly and coaxially on a slideway of the rack. A separating plate is provided on each of the curved support frames. A curved support surface of each of the curved support frames is in contact with a circular edge surface of the corresponding separating plate. The annular fences are mounted on the rack. Each of the annular fences is provided with a first gap and a second gap. The first gap is provided corresponding to the lateral drill pipe stopper. The second gap is configured to allow the drill pipes enter and exit the drill pipe storage unit.
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35.发明申请公开(公告)号：US20210013820A1
公开(公告)日：2021-01-14
申请号：US17037873
申请日：2020-09-30
Applicant: Hunan University of Science and Technology
Inventor： Xiaoping ZHANG , Ping LIU , Sijian KUANG , Zhu ZHANG
Abstract: A modeling method of a stator winding air gap for temperature field analysis of an AC traction motor includes: changing the width of an air gap of a stator winding equivalent model according to a set value of spacing; establishing a three-dimensional finite element model of the AC traction motor with the stator winding air gap; based on the three-dimensional finite element model of different widths of the air gap, analyzing a temperature field to obtain a temperature field distribution diagram of the AC traction motor; carrying out the numerical fitting according to data in the temperature distribution diagram to obtain a function relation between the air-gap width and the temperature of the stator winding equivalent model; and by measuring the actual temperature of a motor stator winding, calculating an optimal air-gap width corresponding to the modeling of the stator winding of the current AC traction motor.
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Patent Agency Ranking
公开(公告)号：US20250044803A1
公开(公告)日：2025-02-06
申请号：US18599605
申请日：2024-03-08
Applicant: Hunan University of Science and Technology
Inventor： Chaoyang CHEN , Zongyao LI , Pei LI , Juan CHEN , Zuguo CHEN , Ying ZOU , Ming LU , Zunhui YI , Lei HE , Liang CHEN
IPC: G05D1/24 , B63G8/00 , B63G8/39 , G01S15/58 , G05D109/30 , G05D111/20
Abstract: The disclosure provides a communication delay compensation method and a communication delay compensation system based on an autonomous robot, where the method includes the following steps: establishing a state equation based on a system model of an AUV positioning system; acquiring an included angle between a direction vector of AUV to an observation station and a velocity vector of AUV based on the system model; establishing an observation equation according to the state equation and the included angle; establishing an extended Kalman filter equation based on the system model, the included angle and the observation equation; and calculating a position information predicted value at the current time by using the extended Kalman filter equation to complete communication delay compensation.
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公开(公告)号：US11983472B2
公开(公告)日：2024-05-14
申请号：US18191149
申请日：2023-03-28
Applicant: Hunan University of Science and Technology
Inventor： Chaoyang Chen , Yong Zhou , Zuguo Chen , Li He , Zhuangxi Tan , Pei Li , Ying Zou , Xiaowen Wu
IPC: G06F30/20 , G06F113/04 , G06F119/02 , H02J3/00
CPC classification number: G06F30/20 , H02J3/00125 , G06F2113/04 , G06F2119/02 , H02J2203/20
Abstract: Disclosed is a method for identifying fragile lines in power grid based on electrical betweenness, which comprises the following steps: constructing the power grid into a network diagram, sequentially removing lines in the network diagram, and sorting the electrical betweenness of each line from large to small; constructing a nonlinear model of complex network cascade failure considering overload and weighted edges, and respectively performing two ways of removing lines for sorted electrical betweenness, namely sequentially removing preset proportion lines and sequentially removing all lines until no new lines are removed in the network diagram; obtaining a change of generator-load power before and after each line removal, and evaluating a severity of power grid failure based on the change of generator-load power, thus completing an identification of power grid fragile lines.
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公开(公告)号：US20230399910A1
公开(公告)日：2023-12-14
申请号：US18457150
申请日：2023-08-28
Applicant: HUNAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
Inventor： Yongping JIN , Zhaodong TONG , Youduo PENG
Abstract: A drilling and sampling device applied to a seafloor tracked vehicle, including a slide seat, a positioning electromagnet, a pipe-replacing cylinder, a dial claw, a plurality of clamping assemblies, a plurality of sampling drill pipes, a drill pipe rack, a frame, a thrust cylinder, a pipe-releasing assembly, a guide rod, a drive pipe, a power head, and a pipe-replacing disc. The guide rod and the thrust cylinder are fixedly arranged on the frame. The slide seat is in clearance fit with the guide rod. A piston rod end of the thrust cylinder is hingedly connected to the slide seat. The power head is fixedly arranged on the slide seat. The drive pipe is arranged at an output end of the power head, and is coaxially screwed with the plurality of sampling drill pipes. The dial claw is slidably arranged in the arc guide groove.
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39.发明公开公开(公告)号：US20230273104A1
公开(公告)日：2023-08-31
申请号：US18314635
申请日：2023-05-09
Applicant: HUNAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
Inventor： Yongping JIN , Fenfei PENG , Deshun LIU
CPC classification number: G01N3/307 , G01N3/066 , G01N2203/0067 , G01N2203/0044 , G01N2203/001
Abstract: A pre-tension and tensile impact test apparatus capable of simulating a full-sea-depth environment includes a pre-tensioning device, a Hopkinson bar device, a seawater pressure simulation device, a power source group and an acquisition control unit. The Hopkinson bar device includes an input rod, an air compressing device, a test sample and an output rod. The pre-tensioning device, the input rod, the air compressing device, the seawater pressure simulation device, the test sample and the output rod are successively arranged on the same axis. The air compressing device includes an air cylinder, an end cover and an impact piston. Two ends of the air cylinder are each provided with the end cover. The impact piston and the air cylinder are in clearance fit. The input rod is coaxially connected to the impact piston. Two ends of the input rod each extend out of the end cover.
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40.发明公开公开(公告)号：US20230273097A1
公开(公告)日：2023-08-31
申请号：US18314730
申请日：2023-05-09
Applicant: HUNAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
Inventor： Yongping JIN , Guangping LIU , Youduo PENG , Wenbo TANG , Ping LIU
IPC: G01N1/04
CPC classification number: G01N1/04
Abstract: A full-sea depth multi-point in-situ sampler includes a sampling assembly, a pressure-retaining assembly, a pressure-compensating assembly, and a cleaning assembly. The sampling assembly includes a handle, an extrusion valve, a needle valve core, a two-stage piston, a sampling tube, and a capturing device. The pressure-retaining assembly includes a pressure-retaining cylinder, a locking mechanism, a floating valve core, a support spring, and a drainage device. The pressure-compensating assembly includes a pressure-compensating cylinder, a piston, and an end cap. The cleaning assembly includes a cleaning sleeve, a cleaning cylinder, and multiple trigger mechanisms. A sampling and transfer method based on the sampler is also provided.
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