Application of model reference adaptive algorithm in fast-steering mirrors

Fast-steering mirrors is the core component of fine tracking system in the electro-optical tracking system. In order to meet the requirements of electro-optical tracking system, the fast-steering mirrors close-loop control system must has high disturbance rejection ability, fast tracking ability and high tracking accuracy. A fourth-order model structure by the approach of theoretical modeling and the needed third-order model structure by the approach of experimental modeling were obtained. After confirming the needed third-order model, an ideal third-order model was chosen which responses fast and precisely to be a reference model in the adaptive control algorithm. For simulating interference, two sinusoidal signals were put in front of the FSM. A large number of simulations explained that, interference could be suppressed efficiently by use of the adaptive control algorithm, and that the third-order reference model could be followed precisely. Since the reference model responses fast and precisely, the FSM control system based on the adaptive control algorithm has the ability of responsing fast and precisely.