Applied Mathematics and Mechanics (English Edition) ›› 2024, Vol. 45 ›› Issue (12): 2183-2202.doi: https://doi.org/10.1007/s10483-024-3191-6

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  • 收稿日期:2024-07-12 出版日期:2024-12-01 发布日期:2024-11-30

Distributionally robust model predictive control for constrained robotic manipulators based on neural network modeling

Yiheng YANG1, Kai ZHANG1,2,*(), Zhihua CHEN3, Bin LI1   

  1. 1 College of Aeronautics and Astronautics, Sichuan University, Chengdu 610065, China
    2 Robotic Satellite Laboratory of Sichuan Province, Sichuan University, Chengdu 610065, China
    3 Beijing Institute of Control Engineering, Beijing 100190, China
  • Received:2024-07-12 Online:2024-12-01 Published:2024-11-30
  • Contact: Kai ZHANG E-mail:zhangkaihit@gmail.com
  • Supported by:
    the National Natural Science Foundation of China(62273245);the National Natural Science Foundation of China(62173033);the Sichuan Science and Technology Program of China(2024NSFSC1486);the Opening Project of Robotic Satellite Key Laboratory of Sichuan Province of China;Project supported by the National Natural Science Foundation of China (Nos. 62273245 and 62173033), the Sichuan Science and Technology Program of China (No. 2024NSFSC1486), and the Opening Project of Robotic Satellite Key Laboratory of Sichuan Province of China

Abstract:

A distributionally robust model predictive control (DRMPC) scheme is proposed based on neural network (NN) modeling to achieve the trajectory tracking control of robot manipulators with state and control torque constraints. First, an NN is used to fit the motion data of robot manipulators for data-driven dynamic modeling, converting it into a linear prediction model through gradients. Then, by statistically analyzing the stochastic characteristics of the NN modeling errors, a distributionally robust model predictive controller is designed based on the chance constraints, and the optimization problem is transformed into a tractable quadratic programming (QP) problem under the distributionally robust optimization (DRO) framework. The recursive feasibility and convergence of the proposed algorithm are proven. Finally, the effectiveness of the proposed algorithm is verified through numerical simulation.

Key words: robotic manipulator, trajectory tracking control, neural network (NN), distributionally robust optimization (DRO), model predictive control (MPC)

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