基于滑模观测器的卫星姿态控制系统滑模容错控制  

Sliding Mode Fault Tolerant Control for Satellite Attitude Systems Based on Sliding Mode Observer

作　　者：程月华[1,2] 姜斌[1] 孙俊 樊雯[1] 

机构地区：[1]南京航空航天大学自动化学院,南京210016 [2]南京航空航天大学高新技术研究院,南京210016 [3]上海航天控制工程研究所,上海200233 [4]上海市空间智能控制技术重点实验室,上海200233

出　　处：《上海交通大学学报》2011年第2期190-194,201,共6页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金资助项目(90816023);江苏省重点科学基金项目(BK2010072)

摘　　要：针对卫星姿态控制系统执行机构故障,设计了基于滑模观测器的滑模容错控制律.采用迭代学习算法在线调节观测器滑模项切换增益,设计滑模观测器估计卫星姿态和角速度.在此基础上,将执行机构故障作为系统的未知动态,提出一种对卫星姿态控制系统执行机构故障不敏感的滑模容错控制方法.该方法利用系统输入和状态信息,结合动力学特性实现未知动态估计,以此设计滑模控制律.通过数字仿真验证了该容错控制方法的有效性.In the presence of actuator faults in attitude control system of satellite,a method of sliding mode fault tolerant control based on sliding mode observer was proposed.The estimation of attitude and angle rate was obtained via a sliding mode observer,and an iterative learning algorithm was utilized to update the switching gain of the sliding mode term.Considering actuator faults as unknown dynamics,a method of sliding mode fault tolerant control which is insensitive to the actuator faults of attitude control system of satellite was presented.By using the system,input and state information,unknown dynamics was estimated based on which a sliding mode control law was designed.Finally,the numerical simulation result demonstrates the effectiveness of the proposed fault tolerant control method.

关 键 词：卫星 姿态控制 滑模观测器 滑模控制 容错控制 

分 类 号：TP183[自动化与计算机技术—控制理论与控制工程]