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中文摘要：
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。
英文摘要：
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.
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