基于频域分析的挠性卫星姿态高稳定度控制  

High stability attitude control for flexible satellite based on frequency-domain analysis

作　　者：张超[1] 孙延超[1] 李传江[1] 马广富[1] 

机构地区：[1]哈尔滨工业大学控制科学与工程系,黑龙江哈尔滨150001

出　　处：《电机与控制学报》2016年第12期92-100,108,共10页Electric Machines and Control

基　　金：国家自然科学基金(61304005;61174200;61403103);国家973计划项目(2012CB720000);高等学校博士学科点专项科研基金(20102302110031)

摘　　要：在考虑外界干扰和挠性振动的影响下,针对卫星姿态的高稳定度控制需求提出了一种控制方案,并给出控制参数的整定方法。采用传统的PD控制结合干扰补偿器的控制方法完成姿态稳定任务。干扰补偿器的设计运用了鲁棒模型匹配的原理,并通过减小干扰输入到角速度输出的幅频响应以提高姿态控制的稳定度。分别给出了挠性影响化作广义干扰和未化作广义干扰时的传递函数模型,然后用频域分析的方法分析了引入干扰补偿器后系统的开环特性以及干扰抑制的性能,并证明了系统的鲁棒稳定性。仿真表明,所采用的姿态控制方法有效抑制了挠性振动,并提高了姿态控制的精确度与稳定度。方法设计简单,容易实现,适于工程应用。Considering external disturbances and flexible vibration, a scheme for satellites high stability at- titude control and its parameter tuning method are presented. Traditional PD controller was applied to realize attitude stabilization combining with the disturbance compensator. The disturbance compensator was designed using robust model matching principle. By reducing the magnitude-frequency response from dis- turbances to angular velocities, the attitude stability was improved. Transfer function models were provided according to the flexible effects being regarded as generalized disturbances or not, respectively. Then the frequency characteristics of the system were analyzed through frequency domain method to demonstrate the effectiveness of the disturbance compensator. And it is proved that the system can reach robust stability. Simulation results show that the attitude control strategy effectively improve the precision and stability and suppresses the flexible vibration. The proposed method is easy to achieve and suitable for engineering ap- plication.

关 键 词：挠性卫星 姿态控制 高稳定度 频域分析 干扰补偿器 

分 类 号：V448.22[航空宇航科学与技术—飞行器设计]