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    SIGNAL TRANSMISSION DEVICE CAPABLE OF SHORTENING TURN-OFF TIME OF CONTROLLED SOURCE IN ELECTROMAGNETIC METHOD
    1.
    发明申请
    SIGNAL TRANSMISSION DEVICE CAPABLE OF SHORTENING TURN-OFF TIME OF CONTROLLED SOURCE IN ELECTROMAGNETIC METHOD 有权

    公开(公告)号：US20250070767A1

    公开(公告)日：2025-02-27

    申请号：US18945463

    申请日：2024-11-12

    Applicant: HUNAN UNIVERSITY OF SCIENCE AND TECHNOLOGY

    Inventor： Guohong FU

    IPC: H03K5/01

    Abstract: A signal transmission device for reducing a turn-off time of an electromagnetic controlled source includes a first electronic switch, a twisted pair cable and a second electronic switch. The first electronic switch constitutes a bridge arm, and includes a first bridge arm switch, a second bridge arm switch, a third bridge arm switch and a fourth bridge arm switch. The second electronic switch is configured to control turn-on and turn-off of the twisted pair cable. The signal transmission device and ground constitute a signal transmission loop.

    Method and system for controlling vibration of rotor in turboshaft engine
    4.
    发明授权
    Method and system for controlling vibration of rotor in turboshaft engine 有权

    公开(公告)号：US11840935B2

    公开(公告)日：2023-12-12

    申请号：US17879936

    申请日：2022-08-03

    Applicant: Hunan University of Science and Technology

    Inventor： Guangfu Bin ,  Chao Li ,  Qingxiong Lu ,  Yangyan Zhang ,  Jian Li ,  Huiyu Xu ,  Weimin Wang ,  Pingping Yang

    IPC: B64D31/00 ,  F01D25/16 ,  B64D31/06

    CPC classification number: F01D25/164 ,  B64D31/00 ,  B64D31/06 ,  F05D2260/96

    Abstract: A method and system for controlling a vibration of a rotor in a turboshaft engine are provided. The method includes: establishing, based on a kinetic model for a rotor-casing system, a mapping matrix indicating a correspondence among an unbalance, an oil film clearance, and a vibration response; performing determination on a real-time vibration response, and skipping adjustment if the real-time vibration response is smaller than a response threshold; otherwise, approximately matching a real-time oil film clearance and the real-time vibration response with the mapping matrix to obtain a real-time unbalance; obtaining, based on the real-time unbalance and the mapping matrix, a preferred vibration response, and further obtaining a preferred oil film clearance; based on the preferred oil film clearance and the real-time oil film clearance, obtaining a clearance adjustment amount; generating a control signal based on the clearance adjustment amount, and performing adjustment based on the control signal.

    METHOD AND SYSTEM FOR CONTROLLING VIBRATION OF ROTOR IN TURBOSHAFT ENGINE
    5.
    发明公开
    METHOD AND SYSTEM FOR CONTROLLING VIBRATION OF ROTOR IN TURBOSHAFT ENGINE 审中-公开

    公开(公告)号：US20230366328A1

    公开(公告)日：2023-11-16

    申请号：US17879936

    申请日：2022-08-03

    Applicant: Hunan University of Science and Technology

    Inventor： Guangfu Bin ,  Chao Li ,  Qingxiong Lu ,  Yangyan Zhang ,  Jian Li ,  Huiyu Xu ,  Weimin Wang ,  Pingping Yang

    IPC: F01D25/16

    CPC classification number: F01D25/164 ,  F05D2260/96

    Abstract: A method and system for controlling a vibration of a rotor in a turboshaft engine are provided. The method includes: establishing, based on a kinetic model for a rotor-casing system, a mapping matrix indicating a correspondence among an unbalance, an oil film clearance, and a vibration response; performing determination on a real-time vibration response, and skipping adjustment if the real-time vibration response is smaller than a response threshold; otherwise, approximately matching a real-time oil film clearance and the real-time vibration response with the mapping matrix to obtain a real-time unbalance; obtaining, based on the real-time unbalance and the mapping matrix, a preferred vibration response, and further obtaining a preferred oil film clearance; based on the preferred oil film clearance and the real-time oil film clearance, obtaining a clearance adjustment amount; generating a control signal based on the clearance adjustment amount, and performing adjustment based on the control signal.

    Denoising optimization method for AC traction motor by chamfering stator tooth shoulder with inscribed arc
    6.
    发明授权
    Denoising optimization method for AC traction motor by chamfering stator tooth shoulder with inscribed arc 有权

    公开(公告)号：US11799353B2

    公开(公告)日：2023-10-24

    申请号：US17212088

    申请日：2021-03-25

    Applicant: HUNAN UNIVERSITY OF SCIENCE AND TECHNOLOGY

    Inventor： Xiaoping Zhang ,  Donghao Liu ,  Bo Fu

    IPC: H02K5/24 ,  G06F30/23

    CPC classification number: H02K5/24 ,  G06F30/23 ,  H02K2213/03

    Abstract: A denoising optimization method for an AC traction motor by chamfering a stator tooth shoulder includes taking an angular vertex of the stator tooth shoulder as an end point, obtaining two points equidistantly along two sides of a stator tooth shoulder angle from the end point; and using the two points as tangent points D1 and D2 of the inscribed arc; making the inscribed arc of the tooth shoulder angle through the two tangent points D1 and D2, cutting off the tooth shoulder angle along the inscribed arc, and adjusting an oblique height HS1 of a stator tooth pole shoe. The invention obtains optimal values of a chamfering size and oblique height of a stator tooth slot pole shoe by adjusting the oblique height of the stator tooth pole shoe and adopting a particle swarm optimization algorithm.

    TESTING DEVICE FOR SIMULATING FRICTIONAL WEAR BEHAVIORS OF THREADED JOINT OF DRILL PIPE UNDER TURBID SEAFLOOR ENVIRONMENT
    7.
    发明公开
    TESTING DEVICE FOR SIMULATING FRICTIONAL WEAR BEHAVIORS OF THREADED JOINT OF DRILL PIPE UNDER TURBID SEAFLOOR ENVIRONMENT 审中-公开

    公开(公告)号：US20230273089A1

    公开(公告)日：2023-08-31

    申请号：US18314660

    申请日：2023-05-09

    Applicant: HUNAN UNIVERSITY OF SCIENCE AND TECHNOLOGY

    Inventor： Yongping JIN ,  Chang WU ,  Deshun LIU

    IPC: G01M5/00

    CPC classification number: G01M5/0033 ,  G01M5/0025

    Abstract: A testing device for simulating frictional wear behaviors of threaded joints of a drill pipe under turbid seafloor environment, including a support, an oil cylinder, upper and lower specimens, a first motor, several second motors, stirring rods, a turbidity sensor, and a test tank. The oil cylinder and test tank are arranged on the support. A piston rod of the oil cylinder is connected to the first motor. A rotating-speed sensor is arranged on a bottom surface of the first motor, facing toward an output shaft of the first motor. The output shaft of the first motor is connected to an upper end of a torque limiter. A lower end of the upper specimen fits an upper end of the lower specimen under loading of a main shaft of the first motor. The stirring rods are provided at two sides of the test tank.

    METHOD FOR OPTIMIZING STRUCTURED MESH GENERATION FOR A THERMAL ANALYSIS MODEL OF A ROTOR BAR OF AN AC MOTOR
    9.
    发明申请
    METHOD FOR OPTIMIZING STRUCTURED MESH GENERATION FOR A THERMAL ANALYSIS MODEL OF A ROTOR BAR OF AN AC MOTOR 有权

    公开(公告)号：US20210240874A1

    公开(公告)日：2021-08-05

    申请号：US17235866

    申请日：2021-04-20

    Applicant: HUNAN UNIVERSITY OF SCIENCE AND TECHNOLOGY

    Inventor： Xiaoping ZHANG ,  Yuxuan GUO ,  Zhu ZHANG ,  Guanghui ZHU ,  Haipeng JIANG ,  Hongwei CHEN

    IPC: G06F30/10

    Abstract: Provided is a method for optimizing structured mesh generation for a thermal analysis model of a rotor bar of an AC motor. A quadrilateral is randomly added within the top surface of the thermal analysis model of the rotor bar. The polygonal top surface is divided into multiple quadrilateral areas by drawing lines from each vertex of the quadrilateral to each vertex of the top surface or two points selected randomly on each edge of the top surface, respectively. A fruit fly optimization algorithm is adopted to obtain a maximum value of the average quality of the quadrilateral areas in a division mode and corresponding coordinates of the vertices of the quadrilateral areas. The top surface is divided into multiple quadrilateral areas according to the division mode corresponding to the maximum average quality to divide the model of the rotor bar into multiple columnar models.

    Half-car floating device based on load feedback and half-car position tracking method
    10.
    发明授权
    Half-car floating device based on load feedback and half-car position tracking method 有权

    公开(公告)号：US11067480B2

    公开(公告)日：2021-07-20

    申请号：US16236632

    申请日：2018-12-30

    Applicant: Hunan University of Science and Technology

    Inventor： Yong Guo ,  Zhewu Chen ,  Ningke Tong ,  Juchuan Dai ,  Shuyi Yang ,  Qihui Ling ,  Hongzhou Li

    IPC: G01M17/04

    Abstract: Disclosed is a half-vehicle floating device and a half-vehicle position tracking method based on load feedback. The device includes a rack, an active platform, a position-measuring triangle frame and a position-measuring platform. Guide rails corresponding to the active platform and the position-measuring platform are provided vertically on the rack. The active platform and the position-measuring platform are respectively placed on a corresponding rail through a slider. The bottom of the active platform is hinged to a first corner of an active triangle frame through an active slider rod, and a second corner of the active triangle is hinged to the rack and connected to an inverter motor through a transmission device. The bottom of the position-measuring platform is hinged to a first corner of the position-measuring triangle frame through a position measuring slider rod, and a second corner of the position-measuring triangle frame is hinged to the rack.

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