A Method of Enhancing Fast Steering Mirror’s Ability of Anti-Disturbance Based on Adaptive Robust Control

Abstract EN

Fast steering mirror (FSM) plays a crucial role in stabilization of the line-of-sight (LOS) and phase shift compensation.

The control accuracy of the FSM is affected by various disturbances especially the vibration in the aviation environment.

Traditional anti-disturbance methods, such as disturbance observer (DOB), have a little effect of suppressing disturbance in FSM.

But it also brings some problem, such as increasing mass and amplifying high frequency noise.

To solve these problems, an anti-disturbance strategy based on adaptive robust control (ARC) was proposed.

And it will not amplify the high-frequency noise which is inevitable in DOB.

Experimental results show that, using adaptive robust controller, the steady-state error of the FSM decreased 4.8 times compared to simple PID control and 1.9 times compared to DOB+PID control in the simulated vibration environment.