非线性系统执行器故障检测及重构  

Actuator Fault Detection and Reconstruction for Nonlinear Systems

作　　者：朱芳来[1] 李志强[1] 

机构地区：[1]同济大学电子与信息工程学院,上海201804

出　　处：《同济大学学报（自然科学版）》2013年第7期1106-1111,共6页Journal of Tongji University:Natural Science

基　　金：国家自然科学基金(61074009);高等学校博士学科点专项科研基金(20110072110015);广西制造系统与先进制造技术重点实验室(PF110289);同济大学基础高等研究院基金;上海市重点学科(B004)

摘　　要：针对受到外部干扰的利布希茨非线性系统,讨论了一种观测器匹配条件不满足下的基于观测器的执行器故障检测方法.通过构造辅助输出,使得匹配条件针对该辅助输出得以满足;通过一高阶滑模观测器,不仅估计出辅助输出,还估计出它的微分.基于高阶滑模观测器,提出了一种执行器故障重构的方法.通过引入一个自适应调节项,对利布希茨常数进行自适应性调节,从而设计中无需知道利布希茨常数的大小.最后通过一个3阶系统的仿真,表明了方法的有效性.The problems of the actuator fault detection and reconstruction based on observers were discussed for uncertain nonlinear systems, when the observer matching condition was not satisfied. An auxiliary output vector was introduced so that the observer matching condition was satisfied. A high-order sliding mode observer was employed to exactly estimate both the auxiliary outputs and their derivatives within a cartain time based on the system outputs. A fault reconstruction method based on the high-order sliding mode observer was developed. An adaptive controller was implemented to adjust the Lipschitz constant adaptively. Finally, a numerical simulation example was given to illustrate the effectiveness of the proposed methods.

关 键 词：滑模观测器 匹配条件 故障检测及重构 

分 类 号：TP13[自动化与计算机技术—控制理论与控制工程]