Study on application of model reference adaptive control in fast steering mirror system

The control accuracy of traditional controllers for fast steering mirror system depends largely on the accuracy of the system model, which limits the performance of the controllers. Model reference adaptive controller (MRAC) is suggested for further improving the control accuracy of the fast steering mirror. Before designing the controller, we first introduced rate feedback to reduce the resonance peak of the fast steering mirror. Then a reference model which has good dynamic performance is selected. The MRAC controller is designed base on Lyapunov theory, which guarantees the asymptotic stability of the whole system and makes the output of the FSM system evolves asymptotically to the selected model. Experimental results show that FSM system with MRAC controller shows excellent dynamic performance.