Abstract: Space mechanical structures tend to be largescale, complex and flexible, which easily leads to residual vibration, and the frequency of residual vibration is low and the vibration time is long. Aiming at the residual vibration problem of multi flexible beams coupling structure, the dynamic model is established by finite element method, and the vibration characteristics are analyzed, showing the characteristics of dense frequency and beat frequency. For the residual vibration problem, combined with fuzzy reinforcement learning control algorithm, the fuzzy rule table is constructed. The action in each rule is selected by εgreedy method, and the control voltage is generated in the end. The feedback learning of stateaction value is carried out via temporal difference (TD) error. After training, the controller converges to a fuzzy control rule. The simulation results show that the fuzzy reinforcement learning controller can quickly suppress the residual vibration of multi flexible beams, and verify the effectiveness of the fuzzy reinforcement learning control algorithm.

Key words: multi flexible beams, vibration control, finite element modeling, fuzzy reinforcement learning