A Fuzzy Indirect Model Reference Adaptive Control and Simulation for Launch Vehicle

摘要

A Fuzzy Indirect Model Reference Adaptive Control (FIMRAC) algorithm is proposed for launch vehicle attitude control system. Considering the structure perturbation and uncertain outer disturbance in the process of flight, such as elastic vibration and liquid sway, the algorithm based on stable reference model is designed so as to track a reference signal, using the feedback of state. Meanwhile, the algorithm can effectively restrain elastic vibration, liquid sway and compensate outer disturbance, by online adjusting the parameters of adaptive law and introducing the mechanism of fuzzy inference. Besides, it is proved that the control system is global, asymptotical and stable, according to Lyapunov stability theory. Simulation results show that the algorithm is effective for launch vehicle attitude control system and has stronger robustness property for outer disturbance.