摘要
针对传统自适应故障估计观测器难于处理存在未知扰动的不确定性系统和无法准确和快速估计时变故障等问题,提出了一种新型的基于自适应故障估计观测器的容错控制系统设计方法。该方法构造增广误差系统,利用线性矩阵不等式(LMI)表述的多目标约束算法,有效抑制了干扰对系统设计的影响,并基于系统状态和故障的实时估计信息,设计了状态反馈容错控制器,使得系统在出现故障时仍可确保稳定性。最后通过仿真实验验证了该算法对时变故障估计的准确性、快速性及故障模式下系统的稳定性。
Considering conventional adaptive fault estimation observer cannot deal with uncertain systems with unknown disturbances well and also cannot estimate fault rapidly and accurately,a novel design method of fault tolerant control system based on fault estimation observer is presented,which effectively inhibit the interference on the system design by construct the augmented error system and multi-objective constraint based on linear matrix inequality(LMI).Then based on the obtained state and fault information,a state feedback fault tolerant control design is proposed to guarantee the stability of faulty systems.Finally,simulation results are presented to show the effectiveness of the proposed method.
作者
彭宇
林瑞仕
高晓颖
屈玉苗
白骏
Peng Yu;Lin Rui-shi;Gao Xiao-ying;Qu Yu-miao;Bai Jun(Beijing Aerospace Automatic Control Institute,Beijing,100076)
关键词
故障估计
容错控制
自适应观测器
线性矩阵不等式
fault estimation
fault tolerant control
adaptive observer
linear matrix inequality
