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A Consideration of Failure Detection in Linear Discrete Systems

Memoirs of the Faculty of Engineering, Yamaguchi University Volume 33 Issue 1 Page 153-160
published_at 1982
KJ00000156450.pdf
[fulltext] 620 KB
Title
線形離散値系の異常性検出についての一考察
A Consideration of Failure Detection in Linear Discrete Systems
Creators Okita Tsuyoshi
Creators Kobayashi Yasuhide
Creators Tanaka Syogo
Source Identifiers
This paper is concerned with the failure detection in linear systems whose dynamics change unexpectedly at unknown time. The generalized likelihood ratio test and the sequential probability ratio test have been applied to these problems, under the given threshold value. If we can not find the adequate threshold value, it results in the deterioration of the reliability or the time-lag in the detection of the failure. But the threshold value should be determined from the experimental results because it can not design analytically. Then, we propose the method which detects the failure of the system adaptively, considering the change pattern of the prameters and the statistics of the noise. The parameter estimates are obtained by using the least square method and the failure of the system may be detected on the basis of the performance index considered the residual and the error covariance of estimated prameters. As the change of the system parameters are unknown, it is treated as a step model and a ramp model. It is shown from the results of the digital simulation that the proposed method may be useful for the detection of the system failure.
Subjects
電気電子工学 ( Other)
Languages jpn
Resource Type departmental bulletin paper
Publishers 山口大学工学部
Date Issued 1982
File Version Version of Record
Access Rights open access
Relations
[ISSN]0372-7661
[NCID]AN00244228
Schools 工学部