基于MEMS加速度计的快速反射镜复合控制  

Composite Control of Fast Steering Mirror Based on MEMS Accelerometer

作　　者：桂潇怡 李伟鹏[1] 郑新涛 黄海[1] Gui Xiaoyi;Li Weipeng;Zheng Xintao;Huang Hal(Beihang University School of Astronautics, Beijing 100191, China)

机构地区：[1]北京航空航天大学宇航学院,北京100191

出　　处：《航天控制》2018年第2期30-36,41,共8页Aerospace Control

摘　　要：设计研制了基座含MEMS加速度计的两轴快速反射镜样机,底部的两组MEMS加速度计测量干扰形成控制前馈,用自适应方法调节前馈系数,从而增强抑制角振动能力。样机的仿真和实验结果显示,静态精度优于1″、小信号带宽高于200Hz。仅转角反馈PID回路工作时对基座振动引起的角振动抑制-42.8d B,增加MEMS加速度前馈回路后达到-47d B。A two-axis fast steering mirror（ FSM） prototype with MEMS accelerometer integrated with the base is designed and developed. The adaptive feed-forward loop of the MEMS accelerometer is established to enhance the FSM internal feedback loop. The simulation and experiment results show that the FSM prototype pointing precision is better than 1″,and the small-signal closed-loop bandwidth is beyond 200 Hz. Besides,the angular perturbation caused by the base vibration can be suppressed to-42. 8 dB and the suppression effect can be enhanced to-47 dB by PID angle feedback loop and with the addition of MEMS acceleration feed-forward loop.

关 键 词：快速反射镜 柔性铰链 自适应前馈 MEMS加速度计 

分 类 号：TP273.3[自动化与计算机技术—检测技术与自动化装置] V556.7[自动化与计算机技术—控制科学与工程]