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Abstract
To deal with the problem of vibration control for large-scale flexible space structure, an detailed distributed vibration control scheme with the switch control method and PD control method improved by fuzzy logic system is proposed in this paper. Firstly, the dynamic model, the actuator model and the multi-subsystem model of a large-scale flexible space structure are established. Then, a distributed control scheme is designed, which installs multiple groups of piezoelectric actuators on the support truss. The traditional methods and the improved method based on fuzzy logic system are discussed. Through ADAMS-MATLAB co-simulation platform, the effectiveness of the distributed control to suppress the vibration of large-scale flexible space structure in both Y and Z directions is verified. The simulation results show that the control precision by the improved method based on fuzzy logic system is better than traditional methods, and the control spillover is not easy to be caused.
Highlights
With the space science and technology are developing rapidly in recent years, on-orbit spacecraft and its appendages are becoming larger and more flexible
Many researchers combine fuzzy control with traditional control methods and apply them to control the vibration of flexible structures
Xu et al [7] proposed an online learning fuzzy control method based on fuzzy logic system and reinforcement learning algorithm
Summary
With the space science and technology are developing rapidly in recent years, on-orbit spacecraft and its appendages are becoming larger and more flexible. The conventional centralized control on satellite is no longer applicable to solve the vibration problem of spacecraft with large deployable flexible appendages, and it is necessary to take distributed control technology. The feasibility of distributed vibration control for solar power station structure is verified. Many researchers combine fuzzy control with traditional control methods and apply them to control the vibration of flexible structures. Rao et al [6] proposed the fuzzy optimal control theory, and verified the feasibility and applicability of this method by a control simulation example of a plane truss. Through the co-simulation of the finite element software and the control system, the feasibility of the novel distributed control method is verified, which suppresses the vibrations of large-scale. DISTRIBUTED VIBRATION CONTROL FOR LARGE-SCALE FLEXIBLE SPACE STRUCTURE IMPROVED BY FUZZY LOGIC SYSTEM. The simulation results show that it has higher control precision and is not easy to cause spillover
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