基于液晶偏转系统的卫星平台振动补偿方法研究  

Research on Satellite Platform Vibration Compensation Method Base on Liquid Crystal Steering System

作　　者：李祥之[1,2] 韩诚山[1] 文明[1] 姜肖楠[1] 赵庆磊[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,长春130033 [2]哈尔滨工业大学卫星技术研究所,哈尔滨150001

出　　处：《宇航学报》2011年第10期2266-2272,共7页Journal of Astronautics

基　　金：创新团队发展计划(IRT0520)

摘　　要：针对卫星平台振动严重影响空间光通信跟瞄精度的问题,提出了基于液晶偏转控制系统的扰动补偿方案。建立了液晶偏转控制系统的数学模型,为了提高收敛速度,设计了基于后验估计误差RLS格型滤波算法的自适应控制器。引入了变阶算法,不但实现了快速、高精度的扰动补偿,而且在没有增加计算量的情况下,消除了高定阶RLS自适应算法中大的暂态响应,改善了控制系统性能。实验结果表明补偿后的扰动残差在10-6rad量级,验证了该控制方案的有效性和可行性。The disturbance compensation scheme based on liquid crystal steering control system is presented because the satellite platform vibration seriously impacts the tracking and pointing accuracy.The mathematical model of liquid crystal steering system is built.For improving convergence speed,the adaptive controller based on the posteriori estimation error＇s RLS lattice filter algorithm is designed,and the variable-order algorithm is introduced,which not only achieves fast adaptive adjustment and optimal steady-state disturbance compensation,but also removes the great transient response of high order RLS algorithm and improves the system performance in the case of not adding amount of calculation.Finally,the experiment results show that residual errors after having been compensated are μ rad magnitude and this control scheme is valid and feasible.

关 键 词：空间光通信 卫星平台振动补偿 液晶偏转 变阶RLS 

分 类 号：TN929.1[电子电信—通信与信息系统]