Journal of System Simulation ›› 2021, Vol. 33 ›› Issue (9): 2128-2137.doi: 10.16182/j.issn1004731x.joss.20-0455

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Trajectory Planning of 6-DOF Manipulator Based on Inverse Multi-objective Optimization

Duan Xianyin1, Zhang Can1, Zhu Zerun2, Sun Zhaoyang2, Jiang Guozhang1, Xiang Feng1   

  1. 1. Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering, College of Mechanical Automation, Wuhan University of Science and Technology, Wuhan 430081, China;
    2.State Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
  • Received:2020-07-08 Revised:2020-08-24 Online:2021-09-18 Published:2021-09-17

Abstract: In order to optimize the machining quality and production efficiency of manipulator, an inverse multi-objective determination method based on the optimization of manipulator stiffness and global travel is proposed. Establishing the forward kinematics model of manipulator, the inverse kinematics is solved by using behaviour tree. The stiffness performance evaluation index and the mathematical model of total stroke of joint angle are constructed to carry out the inverse solution multi-objective optimization. The 7-5-7 order polynomial joint space interpolation algorithm is designed for the trajectory planning. Compared with the commonly used cubic polynomial programming method, the manipulator trajectory obtained by the 7-5-7 order polynomial programming method is more stable and smoother.

Key words: inverse kinematics, manipulator, behaviour tree, stiffness, the motion range of joint, trajectory planning

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