基于反步法的空间目标复合指向控制方法研究  

Space target compound pointing control method based on backstepping

作　　者：张宏 吴云华 钟胜钧 郭海波 ZHANG Hong;WU Yunhua;ZHONG Shengjun;GUO Haibo(College of Astronautics,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China;Shanghai Institute of Satellite Engineering,Shanghai 201108,China)

机构地区：[1]南京航空航天大学航天学院,江苏南京211106 [2]上海宇航系统工程研究所,上海201108

出　　处：《系统工程与电子技术》2023年第9期2884-2893,共10页Systems Engineering and Electronics

基　　金：国家自然科学基金(61973153);青蓝工程资助课题。

摘　　要：针对空间动目标高精度姿态跟踪控制问题,提出一种由卫星和二维转台组成的复合平台姿态高精度控制方法。首先建立复合平台耦合动力学模型,其次针对卫星本体设计反步法控制器实现粗跟踪。当姿态误差满足一定的切换要求时,粗跟踪误差作为二维转台的目标输入,二维转台采用基于负载观测器的模型预测方法辅助卫星本体进行姿态精跟踪控制,从而实现复合平台的高精度姿态控制。此外,设计了非线性干扰观测器,用来估计耦合运动对卫星本体产生的干扰力矩。数值仿真结果表明,所提出的复合平台姿态控制精度可以提高一个数量级,可以实现高精度姿态跟踪控制,为航天工程实践提供一定的理论基础。A composite platform high precision control method composed of satellite platform and two-dimensional turntable is proposed for space moving target high precision attitude tracking.Firstly,the coupled dynamics model of the composite platform is established.Secondly,the backstepping controller is designed for the satellite to achieve coarse tracking.When the attitude error meets certain switching requirement,the two-dimensional turntable adopts the model predictive controller based on the loading observer to assist the satellite to perform the attitude precision tracking.In addition,the nonlinear disturbance observer is designed to estimate the disturbance torque generated by the coupled motion on the satellite body.Finally,the numerical simulation results show that the attitude accuracy of the proposed method can be improved by an order of magnitude,which can realize high-precision attitude tracking control,and provide research basis for engineering practice.

关 键 词：空间动目标 动态跟踪 复合平台 耦合动力学 模型预测控制 

分 类 号：V448.222[航空宇航科学与技术—飞行器设计]