Patents by Inventor Xianwen Zeng

Xianwen Zeng has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 12233550
    Abstract: A robot control method, a robot, and a computer-readable storage medium are provided. The method includes: obtaining a linear motion model of a robot; determining a predicted state corresponding to each moment in a preset time period based on the linear motion model; determining an expected state corresponding to each moment in the preset time period; and determining a compensation value of a velocity of joint(s) at each moment from k-th moment to k+N?1-th moment based on the predicted state corresponding to each moment in the preset time period and the expected state corresponding to each moment in the preset time period, determining instruction parameter(s) at the k-th moment based on the compensation value of the velocity of the joint(s) at the k-th moment, and adjusting a position of each of the joint(s) of the robot according to the instruction parameter(s) at the k-th moment.
    Type: Grant
    Filed: November 28, 2022
    Date of Patent: February 25, 2025
    Assignee: UBTECH ROBOTICS CORP LTD
    Inventors: Xianwen Zeng, Yizhang Liu, Youjun Xiong
  • Patent number: 12186909
    Abstract: A robot control method, a robot, and a computer-readable storage medium are provided. The method includes: obtaining a trajectory planning parameter of joint(s) of the robot, force data of an end of the robot, and force data of the joint(s); obtaining an end admittance compensation amount; determining a first joint parameter and a first slack variable corresponding to the end admittance compensation amount in a joint space of each of the joint(s) based on the end admittance compensation amount and the trajectory planning parameter; obtaining a joint admittance compensation amount; determining a second joint parameter based on the first joint parameter, the first slack variable, the joint admittance compensation amount, and the trajectory planning parameter; determining a target joint commanding position based on the second joint parameter; and controlling the robot to move according to the target joint commanding position.
    Type: Grant
    Filed: December 6, 2022
    Date of Patent: January 7, 2025
    Assignee: UBTECH ROBOTICS CORP LTD
    Inventors: Xianwen Zeng, Yizhang Lìu, Xuan Luo, Youjun Xiong
  • Patent number: 12123489
    Abstract: A gearbox casing is provided in which a bottom part or a side part of the gearbox casing has a number of first coolant tanks. The gearbox casing above a bottom part of the first coolant tanks is provided therein with a lubricating liquid, and the first coolant tanks are used to cool the lubricating liquid. A first coolant tank is provided therein with a number of parallel partition walls, by which the first coolant tank is separated into at least two communicated sub-tanks that are provided with first fixed guide ribs and first suspended guide ribs to divide the coolant.
    Type: Grant
    Filed: August 14, 2020
    Date of Patent: October 22, 2024
    Assignee: JING-JIN ELECTRIC TECHNOLOGIES CO., LTD.
    Inventors: Jianwen Li, Xudong Yang, Xianwen Zeng, Jiaqi Li
  • Patent number: 12115673
    Abstract: A robot obstacle avoidance method, a robot controller using the same, and a storage medium are provided. The method includes: determining an influence value of an obstacle on a motion range of a joint of the robot according to a position of the obstacle in a workspace of the robot; establishing a state transition relationship of the robot by taking a joint velocity of the robot as a control target and a joint angular velocity of the robot as a control input quantity; and avoiding the robot from colliding with the obstacle during a movement process of the robot by performing a model predictive control on the robot according to the state transition relationship and the influence value. In the present disclosure, the influence of the obstacle on the motion range of the joint of the robot is fully considered.
    Type: Grant
    Filed: November 3, 2022
    Date of Patent: October 15, 2024
    Assignee: UBTECH ROBOTICS CORP LTD
    Inventors: Yizhang Líu, Youjun Xiong, Xianwen Zeng, Zhihao Zhang, Meihui Zhang, Chunyu Chen
  • Publication number: 20240181633
    Abstract: A robot control method, a robot, and a computer-readable storage medium are provided. The method includes: obtaining a trajectory planning parameter of joint(s) of the robot, force data of an end of the robot, and force data of the joint(s); obtaining an end admittance compensation amount; determining a first joint parameter and a first slack variable corresponding to the end admittance compensation amount in a joint space of each of the joint(s) based on the end admittance compensation amount and the trajectory planning parameter, obtaining a joint admittance compensation amount; determining a second joint parameter based on the first joint parameter, the first slack variable, the joint admittance compensation amount, and the trajectory planning parameter; determining a target joint commanding position based on the second joint parameter; and controlling the robot to move according to the target joint commanding position.
    Type: Application
    Filed: December 6, 2022
    Publication date: June 6, 2024
    Inventors: XIANWEN ZENG, Yizhang Liu, Xuan Luo, Youjun Xiong
  • Patent number: 11992946
    Abstract: A joint acceleration planning method, a redundant robot using the same, and a computer readable storage medium are provided.
    Type: Grant
    Filed: December 16, 2021
    Date of Patent: May 28, 2024
    Assignee: UBKANG (QINGDAO) TECHNOLOGY CO., LTD.
    Inventors: Yizhang Liu, Youjun Xiong, Xuan Luo, Xianwen Zeng, Ligang Ge, Chunyu Chen
  • Publication number: 20230258261
    Abstract: A gearbox casing is provided in which a bottom part or a side part of the gearbox casing has a number of first coolant tanks. The gearbox casing above a bottom part of the first coolant tanks is provided therein with a lubricating liquid, and the first coolant tanks are used to cool the lubricating liquid. A first coolant tank is provided therein with a number of parallel partition walls, by which the first coolant tank is separated into at least two communicated sub-tanks that are provided with first fixed guide ribs and first suspended guide ribs to divide the coolant.
    Type: Application
    Filed: August 14, 2020
    Publication date: August 17, 2023
    Inventors: Jianwen LI, Xudong YANG, Xianwen ZENG, Jiaqi LI
  • Publication number: 20230258260
    Abstract: A liquid cooling heat dissipation structure and a gearbox casing that includes heat dissipation structure are disclosed. The heat dissipation structure includes a coolant tank and a cover plate that is used to seal the coolant tank. Two ends of the coolant tank are respectively provided with a liquid inlet and a liquid outlet. The coolant tank is provided therein with a plurality of fixed guide ribs that are arranged alternately and at intervals to form a continuous S-shaped or maze shaped channel for the coolant to flow through. The suspended guide ribs are further provided between the fixed guide ribs or between a fixed guide rib and an inner wall of the coolant tank.
    Type: Application
    Filed: August 14, 2020
    Publication date: August 17, 2023
    Inventors: Jianwen LI, Xudong YANG, Xianwen ZENG
  • Publication number: 20230166400
    Abstract: A robot control method, a robot, and a computer-readable storage medium are provided. The method includes: obtaining a linear motion model of a robot; determining a predicted state corresponding to each moment in a preset time period based on the linear motion model; determining an expected state corresponding to each moment in the preset time period; and determining a compensation value of a velocity of joint(s) at each moment from k-th moment to k+N?1-th moment based on the predicted state corresponding to each moment in the preset time period and the expected state corresponding to each moment in the preset time period, determining instruction parameter(s) at the k-th moment based on the compensation value of the velocity of the joint(s) at the k-th moment, and adjusting a position of each of the joint(s) of the robot according to the instruction parameter(s) at the k-th moment.
    Type: Application
    Filed: November 28, 2022
    Publication date: June 1, 2023
    Inventors: XIANWEN ZENG, Yizhang LIU, Youjun XIONG
  • Publication number: 20230158672
    Abstract: A robot obstacle avoidance method, a robot controller using the same, and a storage medium are provided. The method includes: determining an influence value of an obstacle on a motion range of a joint of the robot according to a position of the obstacle in a workspace of the robot; establishing a state transition relationship of the robot by taking a joint velocity of the robot as a control target and a joint angular velocity of the robot as a control input quantity; and avoiding the robot from colliding with the obstacle during a movement process of the robot by performing a model predictive control on the robot according to the state transition relationship and the influence value. In the present disclosure, the influence of the obstacle on the motion range of the joint of the robot is fully considered.
    Type: Application
    Filed: November 3, 2022
    Publication date: May 25, 2023
    Inventors: YIZHANG LIU, Youjun Xiong, Xianwen Zeng, Zhihao Zhang, Meihui Zhang, Chunyu Chen
  • Publication number: 20230130977
    Abstract: A method for controlling a robot comprising an end effector includes: establishing at steady state between the end effector and a working surface through a preset impedance control mechanism, and adjusting a contact force between the end effector and the working surface according to a preset desired force; obtaining a contact torque generated by the contact force; controlling the end effector to rotate according to the contact torque until a pose of the end effector is consistent with a pose of the working surface; and controlling the end effector to move tangentially along the working surface.
    Type: Application
    Filed: December 28, 2022
    Publication date: April 27, 2023
    Inventors: Xianwen Zeng, Yizhang Liu, Meihui Zhang, Jinliang Chen, Youjun Xiong
  • Publication number: 20230101489
    Abstract: A joint acceleration planning method, a redundant robot using the same, and a computer readable storage medium are provided.
    Type: Application
    Filed: December 16, 2021
    Publication date: March 30, 2023
    Inventors: Yizhang Liu, Youjun Xiong, Xuan Luo, Xianwen Zeng, Ligang Ge, Chunyu Chen
  • Publication number: 20220379469
    Abstract: A massage motion control method, a robot controller using the same, and a storage medium are provided. The method includes: calculating a robot end desired speed and a robot end desired angular speed corresponding to a desired massage trajectory of a massage robot to compensate using two obtained robot end compensation amounts in the case that the desired massage trajectory for a target massage area at a current control cycle, a robot end speed compensation amount meeting a desired massage intensity requirement, and a robot end angular speed compensation amount adapted to an environmental curvature of the target massage area are obtained, and controlling the massage robot by determining a corresponding to-be-outputted joint angle based on motion parameter(s) obtained by the compensation. In this manner, the adaptive change of the massage position and the massage intensity for the massage area of the patient can be realized.
    Type: Application
    Filed: March 23, 2022
    Publication date: December 1, 2022
    Inventors: Xianwen Zeng, Yizhang Liu, Youjun Xiong