Cheng, Joseph Hurk-Ning
(1986)
Frequency Domain Approaches to Fault Detection in Closed-Loop Systems.
MSc(R) thesis, University of Glasgow.
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Abstract
This thesis describes fault detection techniques which can be applied to closed-loop automatic control systems. Particular emphasis is placed upon frequency domain methods. Digital simulation is used for the evaluation of on-line techniques for fault detection using pseudo-random-binary test signals. This simulation work involves a simple process model based on a two tank liquid flow control system. Frequency-domain identification using pseudo-random-binary test signals is performed by means of a mixed radix-2 fast Fourier transformation technique. This technique avoids the synchronisation problems which arise when the more conventional radix-2 transformation is used with pseudo-random binary test signals. A novel method of parameter sensitivity analysis is investigated both in terms of the identification of faults and for system optimisation following fault occurrence.
Item Type: |
Thesis
(MSc(R))
|
Qualification Level: |
Masters |
Keywords: |
Electrical engineering |
Date of Award: |
1986 |
Depositing User: |
Enlighten Team
|
Unique ID: |
glathesis:1986-77351 |
Copyright: |
Copyright of this thesis is held by the author. |
Date Deposited: |
14 Jan 2020 09:11 |
Last Modified: |
14 Jan 2020 09:11 |
URI: |
http://theses.gla.ac.uk/id/eprint/77351 |
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