Journal of System Simulation ›› 2018, Vol. 30 ›› Issue (4): 1448-1455.doi: 10.16182/j.issn1004731x.joss.201804029

Previous Articles     Next Articles

L2-gain Robust Control for Flexible Joints and Flexible Link Space Robot

ZhangLijiao1,2, Chen Li1,2   

  1. 1.School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou 350108, China;
    2.Collaborative Innovation Center of High End Equipment Manufacturing, Fuzhou 350116, China
  • Received:2016-04-14 Revised:2016-07-22 Online:2018-04-08 Published:2019-01-04

Abstract: The trajectory tracking and the double flexible vibration active suppression control for free-floating space robot with flexible-joints and flexible-link were proposed. The dynamic equation of the system was established according to system’s momentum conservation and Lagrange method. A singular perturbation model was established by integral manifold method, and the system was decomposed into a fast subsystem of flexible-joint which used the speed difference between the feedbacks of control law to suppress the elastic vibration of flexible-joints, a fast subsystemof flexible-link which designed optimal linear quadratic regulator (LQR) to damp out the vibration of the flexible manipulator and a slow subsystemwhich designed a robust controller to make the external disturbances have the performance of the L2-gain of the system, that avoids to directly solve the HJI (Inequality Hamilton-Jacobi) inequality of large calculation. Numerical simulation results show that the proposed control algorithm is effective.

Key words: external disturbance, freefloating, space robot with flexible-joint and flexible-link, L2-gain robust control, dual vibration grading suppression

CLC Number: