基于固定滞后平滑算法的线性离散时变系统故障估计  

Fixed-lag Smoothing-based Fault Estimation for Linear Discrete Time-varying Systems

作　　者：赵辉宏[1] 李传祥[1] 

机构地区：[1]德州学院清洁能源研究与技术推广中心,山东德州253023

出　　处：《德州学院学报》2013年第6期63-68,共6页Journal of Dezhou University

摘　　要：研究一类线性离散时变系统的故障估计问题.首先,通过引入一种规则化最小二乘标准来作为故障估计问题的性能指标;进而,应用最小二乘固定滞后平滑算法,得到了估计问题可解的充要条件,给出了故障和状态的一步滞后平滑估计器和两步滞后平滑估计器.算例验证了本文所提方法的有效性.This paper addresses the fault estimation problem for linear discrete time--varying systems. First, a regularized least--squares criterion is introduced as a performance index of the fault estimation problem. Moreover, by applying the least--squares fixed--lag smoothing algorithm, a sufficient and nec- essary condition on the existence of the fault estimator is derived. Simultaneously, the simultaneous state and fault estimator is obtained if the solvable conditions are satisfied. Finally, a numerical example is pres- ented to illustrate the proposed method.

关 键 词：线性离散时变系统 故障估计 规则化最小二乘 固定滞后平滑 

分 类 号：TP13[自动化与计算机技术—控制理论与控制工程]