高指向精度柔性航天器的H∞PID控制设计  

H∞PID Control Design of High Pointing Precision Flexible Spacecraft

作　　者：李世宏 庞爱平 王勇[1] LI Shi-hong;PANG Ai-ping;WANG Yong(Air Force Aviation University,Changchun 130000 China;Guizhou University,School of Electrical Engineering,Department of Automation,Guiyang 550000 China)

机构地区：[1]空军航空大学,吉林长春130000 [2]贵州大学电气工程学院自动化系,贵州贵阳550000

出　　处：《自动化技术与应用》2023年第6期1-4,130,共5页Techniques of Automation and Applications

基　　金：贵州大学培育项目(贵大培育[2019]60);贵州省教育厅青年人才成长项目(黔科合KY[2021])。

摘　　要：针对具有大挠性航天器姿态控制中存在系统柔性结构、外界干扰以及模型不确定性的问题,提出一种基于H∞理论的PID控制方法。根据H∞最优性能指标设计一个具有固定低阶次的鲁棒控制器,保证系统保持鲁棒稳定性和令人满意的性能。以携带大型柔性太阳帆的航天器为例,对航天器的俯仰轴控制系统进行仿真研究,结果表明控制器能有效地抑制柔性结构的振动,并相对于传统的PID控制器和H∞控制器,能更快地满足指向系统的高指向精度要求。Aiming at the problems of flexible system structure,external interference and model uncertainty in the attitude control of a spacecraft with large flexibility,a PID control method based on H∞ theory is proposed.This method designs a robust controller with a fixed low order according to the H∞ optimal performance index,which ensures that the system still maintains robust stability and satisfaction.In this paper,taking a spacecraft carrying a large flexible solar sail as an example,a simulation study is carried out on the pitch axis control system of the spacecraft.The results show that the designed controller can effectively suppress the vibration of the flexible structure and can meet the requirements of the pointing system faster than the traditional PID controller and H∞ controller.High pointing accuracy requirements.

关 键 词：柔性航天器 H∞理论 H∞ PID控制 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]