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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2021, Vol. 42 ›› Issue (11): 524890-524890.doi: 10.7527/S1000-6893.2020.24890

• Article • Previous Articles     Next Articles

Distributed coordinated control for large flexible truss antenna considering connection nonlinearity

LIU Fucheng1, ZHU Dongfang2,3   

  1. 1. Shanghai Academy of Spaceflight Technology, Shanghai 201109, China;
    2. Shanghai Aerospace Control Technology Institute, Shanghai 201109, China;
    3. Shanghai Key Laboratory of Aerospace Intelligent Control Technology, Shanghai 201109, China
  • Received:2020-10-19 Revised:2020-11-30 Published:2021-01-26
  • Supported by:
    National Natural Science Foundation of China (61903245, 61803258); Shanghai Rising-Star Program (19QB1402100, 20QA1404400)

Abstract: A dynamic model is established for the large space flexible structure with nonlinear connections based on the theory of dynamic substructure. On this basis, the dynamic model of the flexible structure vibration subsystem is converted into a distributed-parametric system model. Considering the states of the structure cannot be directly measured by any type of sensor, an optimum consensus observer is designed to estimate the main system's modal coordinates. Using the graph theory, a new leader-follower-based consensus vibration controller is proposed to actively suppress the oscillations in distributed parameter flexible structures. The proposed control method can realize high-precision shape maintaining control of large space flexible structure, and is robust to the failure of the structure control elements. The simulation results show the effectiveness of the proposed control method.

Key words: truss antenna, nonlinear connection, distributed coordinated control, consistency, robust control

CLC Number: