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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2021, Vol. 42 ›› Issue (1): 524246-524246.doi: 10.7527/S1000-6893.2020.24246

• Dissertation • Previous Articles    

Multi-target coordinated control of wheel-legged Mars rover

SUN Yanlong1, HE Jun1, XING Yan2   

  1. 1. School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;
    2. Beijing Institute of Control Engineering, Beijing 100190, China
  • Received:2020-05-18 Revised:2020-06-11 Published:2020-08-07
  • Supported by:
    National Natural Science Foundation of China (51575337); Equipment Pre-research Aerospace Joint Fund (6141B06220407); Key Laboratory Fund of Science and Technology on Space Intelligent Control (HTKJ2019-KL502011)

Abstract: The Mars exploration mission requires the robot to be dynamically stable and adaptive to the unknown irregular terrain. This paper proposes a multi-target coordinated control strategy for a wheel-legged Mars exploration robot based on the inverse kinematics model, the vehicle body attitude and the wheel-to-ground contact force. Through kinematic modeling of vehicle attitude adjustment, the first-order low-pass filtering and leg impedance control algorithm, and the center of gravity height adjustment algorithm based on the leg motion hazard coefficient, we realize the tracking control of the vehicle body attitude, wheel-ground constant force contact control and the optimal control of the center of gravity height, thereby improving the self-adaptability, movement stability and the safety of the leg movement space when the wheel-legged robot passes unstructured topographies. The effectiveness of this control strategy proposed in this paper is verified by the joint simulation of MATLAB and UG.

Key words: wheel-legged robots, coordinated control, kinematics, ZMP method, joint simulation

CLC Number: