基于自适应鲁棒控制提升快速反射镜的抗扰能力

Improving Anti-Disturbance Capability of Fast Steering Mirror by Adaptive Robust Control

航空光电稳定平台广泛采用快速反射镜进行视轴稳定,航空环境中的各种扰动,尤其是振动会影响快速反射镜的稳定性能。针对传统的抗扰方法[如比例-积分-微分控制器(PID)、干扰观测器(DOB)等]抑制扰动效果不明显的问题,提出一种基于自适应鲁棒控制(ARC)方法的快速反射镜抗扰策略。实验测试发现,引入ARC以后,快速反射镜在振动环境中的稳态均方根误差值相比于PID降低约80%,相比于DOB降低约60%,表明ARC对于提升快速反射镜的抗扰能力和稳定性能具有显著效果,具有较大的工程应用价值。

Fast steering mirrors (FSM) are widely used in aeronautical optoelectronic stabilization platform for lineof- sight stabilization. The stability of the FSM is affected by various disturbances especially the vibration in the aviation environment. Traditional anti-disturbance methods, such as proportion integration differentiation controller (PID) and disturbance observer (DOB), have a little effect on suppressing disturbance in FSM. To solve these problems, a fast anti-disturbance strategy based on adaptive robust control (ARC) is proposed. The experimental results show that the steady-state root mean square error of FSM in vibration environment is reduced by about 80% compared with that of the PID control strategy and about 60% compared with that of the DOB control strategy after the introduction of the ARC. It shows that ARC has remarkable effect on improving the anti-interference ability and stability of FSM, and has large engineering application value.