自动化学报2017，Vol.43Issue(11)：1920-1930,11.DOI:10.16383/j.aas.2017.c160479
基于SWT与等价空间的LDTV系统故障检测
SWT and Parity Space Based Fault Detection for Linear Discrete Time-varying Systems
摘要
Abstract
This paper deals with fault detection (FD) for linear discrete time-varying (LDTV) systems by combining stationary wavelet transform(SWT)with parity space based method,so as to improve the FD performance. By employing SWT to filter the residual generated with low order parity relation,the design of residual generator can be formulated as multi-objective optimization problem at each scale of SWT, so that minimum ratio criterion of robustness to unknown input and sensitivity to faults are assured,and a bank of multi-scale residuals are obtained by applying the SWT recursive algorithm. Moreover, by analysing the generated residual signals at multiscale, the faults within a broader frequency band can be detected and a lower miss detection rate can be achieved. Finally,a numerical example is given to verify the effectiveness of the proposed approach.关键词
故障检测/等价空间/平稳小波变换/LDTV系统Key words
Fault detection/parity space/stationary wavelet transform (SWT)/linear discrete time-varying (LDTV) systems引用本文复制引用
薛婷,钟麦英..基于SWT与等价空间的LDTV系统故障检测[J].自动化学报,2017,43(11):1920-1930,11.基金项目
国家自然科学基金(61333005, 61733009, 61421063) 资助 Supported by National Natural Science Foundation of China (61333005, 61733009, 61421063) （61333005, 61733009, 61421063）
