基于自触发的大挠性航天器模型预测姿态控制  

Model predictive attitude control of large flexible spacecraft based on the self-triggered scheme

作　　者：赵桐 管萍[1] 戈新生[1] 曹彧腾 ZHAO Tong;GUAN Ping;GE Xinsheng;CAO Yuteng(School of Automation,Beijing Information Science&Technology University,Beijing 100192,China)

机构地区：[1]北京信息科技大学自动化学院,北京100192

出　　处：《北京信息科技大学学报（自然科学版）》2022年第2期22-29,共8页Journal of Beijing Information Science and Technology University

基　　金：国家自然科学基金重点资助项目(11732005);国家自然科学基金青年基金项目(12002058)。

摘　　要：针对大挠性航天器,考虑其控制量受限,设计了自触发模型预测姿态控制系统。在控制量更新时刻,基于模型求解优化问题推导出预测控制序列,取控制序列的前若干步来控制实际系统。不同于传统模型预测控制需要在每个采样时刻求解优化问题,该控制方法采用自触发策略确定控制量更新时刻和预测时域,以有效减少优化问题的求解次数,从而缩短了控制算法的在线计算时间,使系统状态能快速进入终端区域,然后采用状态反馈控制使姿态角迅速到达期望值,证明了控制算法的可行性及自触发预测姿态控制系统的稳定性。仿真结果表明,该姿态控制方法可使大挠性航天器姿态角快速跟踪姿态角期望值,有较好的动静态性能。Considering the constrained control,a self-triggering model predictive attitude control system was designed for large flexible spacecraft.At each updating control instant,the predictive control sequence was derived by solving the optimization problem based on the model with the first several steps of the control sequence applied to the actual system.Different from traditional model predictive control which needs to solve the optimization problem at each sampling instant,the designed control method determines the updating control instant and the predictive horizon by the self-triggered strategy to reduce the frequency of solving optimization problem effectively.Thus the online calculate time of control method is decreased so that the system state can be driven into the terminal region quickly and the attitude angle can fast track the desired value under the state feedback control.The feasibility of the proposed control method and the stability of the self-triggered model predictive attitude control system are proved.Simulation results show that the proposed attitude control can drive the attitude angle of large flexible spacecraft to the desired value and has excellent dynamic and static control performance.

关 键 词：大挠性航天器 姿态控制 模型预测控制 自触发控制 

分 类 号：V448.22[航空宇航科学与技术—飞行器设计]