摘要
提出了一种基于自适应观测器的故障诊断与容错控制策略,应用到近空间高超声速飞行器(NSHV)上处理执行器故障.NSHV是非线性、多变量和强耦合的系统,首先使用T-S模糊技术建模,基于T-S模型设计自适应故障诊断观测器(AFDO).然后定义AFDO和实际系统误差的范数作为残差来检测故障,采用自适应故障估计算法估计系统故障.基于所得故障信息,设计容错控制器(FTC)来补偿执行器的失效.通过求解线性矩阵不等式得到AFDO的增益矩阵,采用Lyapunov理论证明了误差系统的稳定性.最后,对高超声速飞行器的纵向模型进行算法验证,仿真结果表明了所提方法的有效性.
A fault diagnosis and fault-tolerant control scheme using adaptive observer is generalized to near space hypersonic vehicle(NSHV) to deal with actuator fault.The model of NSHV is nonlinear,multivariable and strong coupling,so T-S fuzzy technique is used for modeling,and an adaptive fault diagnosis observer(AFDO) is designed based on the T-S fuzzy model.Then a residual is defined as the norm of the output error between AFDO and actual system to detect fault,and adaptive estimation algorithm is proposed to estimate the fault.Fault tolerant controller(FTC) is designed by utilizing the diagnostic fault information to compensate for the loss of actuator effectiveness.The gain matrices of AFDO are obtained by solving linear matrix inequalities(LMI) and the stability of the error dynamic system is proved using Lyapunov theory.Finally,simulation results of the longitudinal model of NSHV are presented to illustrate the effectiveness of the proposed approach.
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2009年第S1期189-194,共6页
Journal of Southeast University：Natural Science Edition
基金
国家自然科学基金资助项目(90816023)
