基于输出时滞方法的采样数据系统故障估计  

An output delay approach to fault estimation for sampled-data systems

作　　者：文成林[1] 邱爱兵[2] 姜斌[3] 

机构地区：[1]杭州电子科技大学系统科学与控制工程研究所,杭州310018 [2]南通大学电气工程学院,南通226019 [3]南京航空航天大学自动化学院,南京210016

出　　处：《中国科学：信息科学》2013年第5期694-706,共13页Scientia Sinica(Informationis)

基　　金：国家自然科学基金项目(批准号:61104028;60934009;61034005);南通市科技项目(批准号:BK2011016)资助

摘　　要：从时滞系统角度率先研究了一类非均匀采样数据系统的故障估计问题.首先,基于输出时滞方法将采样数据系统建模成具有时变时滞输出的连续时间系统;然后,通过分析自适应诊断观测器不再适用于此类连续时滞系统的原因,提出了一种能够保证估计误差指数收敛的增广故障估计滤波器设计新方法;并进一步研究了具有噪声干扰的采样数据系统的时变故障估计问题;最后,通过对某型飞控系统的仿真实验结果验证了所提方法的有效性.The problem of fault estimation for a class of non-uniformly sampled-data systems is investigated from the time delay point of view in this paper.Firstly,the output delay approach is employed to model the sampled-data system as a continuous-time one with time-varying delay output.Then,based on the analysis of the inapplicability of the adaptive fault diagnosis observer in such class of time-delay systems,a novel augmented fault estimation observer design method is proposed to guarantee the exponential convergence of the estimation errors.Furthermore,an extension to the case of time varying fault estimation for the noisy sampled-data systems is studied.Finally,simulation results of a-ight control system are presented to demonstrate the e-ectiveness of the proposed method.

关 键 词：故障估计 非均匀采样 增广观测器 输出时滞 采样数据 

分 类 号：TP311.13[自动化与计算机技术—计算机软件与理论]