第19卷第9期 2011年9月
文章编号
1004-924X(2011)09-2085-07
光学精密工程
Optics and Precision Engineering
Vol. 19No. 9
Sep.2011
基于压电偏转系统的卫星平台振动补偿
韩诚山，李祥之，文明，赵庆磊，姜肖楠
（中国科学院长春光学精密机械与物理研究所，吉林长春130033）
摘要：针对卫星平台振动严重影响空间光通信跟瞄精度的间题，提出了基于压电偏转控制系统的扰动补偿方案。建立了压电偏转系统的数学模型，设计了基于改进型最小均方根(LMS)滤波算法的自适应控制器，分析了最优步长选择的影响因素。针对输人信号的相位延遇间题，设计了自适应延迟滤波器，不仅有效地补偿了相位延迟，还可通过自适应调节输人信号相位，在不增加步长的前提下提高收敛速率。最后进行了实验验证，结果表明补偿后的残余误差仅为urad量级，补偿因子达85%以上，验证了补偿算法的有效性和可行性。
关键词：空间光通信；卫呈平台；额动补偿；压电偏转；LMS滤波
中图分类号：TN929.1;V476.5
文麟标识码：A
doi;10. 3788/OPE, 20111909. 2085
Vibrationcompensationofsatelliteplatform based onpiezo-electric steeringsystem
HAN Cheng-shan,LI Xiang-zhi',WEN Ming,ZHAO Qing-lei,JIANG Xiao-nan
(Changchun Institute of Optics,Fine Mechanics and Physics, Chinese Academy of Sciences,Changchun130033,China) +Correspondingauthor,E-mqil:liriangzhi219@163.com
Abstract: A disturbance compensation scheme based on a piezo-electric steering control system was presented,for the vibration of a satellite platform seriously impacted the tracking and pointing accura cy in space optical communication. A mathematical model for the piezo-electric steering system was built. Then, an adaptive controller based on an improved Least Mean Square(LMS) filter was de-signed, and effect factors on optimal step length choices were analyzed. For the problem of signal phase delay, an adaptive delay filter was designed not only to compensate the phase delay, but also a daptively to adjust the input signal phase to increase its convergence rate without adding the step length. Finally, a verifying experiment was performed. The results show that the remained erors af-ter compensation are μrad magnitude and the compensation factor is over 85%. These results prove that this control scheme is valid and feasible.
Key words: space optical communication; satellite platform; vibration compensation; piezo-electric
steering; LMS filtering
收日期：2010-12-02；修订日期：2011-02-15.
基金项目：长江学者和创新团队发展计划资助项目（No.IRT0520）