Controller modification applied for active fault detection

Hans Henrik Niemann; Jakob Stoustrup; Niels Kjølstad Poulsen

doi:10.1109/ACC.2014.6858784

Controller modification applied for active fault detection

Authors:

Niemann, Hans Henrik ;
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0000-0002-1518-4979
Department of Electrical Engineering, Technical University of Denmark
Stoustrup, Jakob ;
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Department of Mechanical Engineering, Technical University of Denmark
Poulsen, Niels Kjølstad
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0000-0002-8476-0052
Department of Applied Mathematics and Computer Science, Technical University of Denmark

DOI:

10.1109/ACC.2014.6858784

Abstract:

This paper is focusing on active fault detection (AFD) for parametric faults in closed-loop systems. This auxiliary input applied for the fault detection will also disturb the external output and consequently reduce the performance of the controller. Therefore, only small auxiliary inputs are used with the result that the detection and isolation time can be long. In this paper it will be shown, that this problem can be handled by using a modification of the feedback controller. By applying the YJBK-parameterization (after Youla, Jabr, Bongiorno and Kucera) for the controller, it is possible to modify the feedback controller with a minor effect on the external output in the fault free case. Further, in the faulty case, the signature of the auxiliary input can be optimized. This is obtained by using a band-pass filter for the YJBK parameter that is only effective in a small frequency range where the frequency for the auxiliary input is selected. This gives that it is possible to apply an auxiliary input with a reduced amplitude. An example is included to show the results.

ISBN:

9781479932726

Type:

Conference paper

Language:

English

Published in:

Proceedings of the American Control Conference, 2014, p. 1963-1968

Keywords:

band-pass filters; closed loop systems; fault diagnosis; feedback; Components, Circuits, Devices and Systems; Active fault detection; Adaptive control; band-pass filter; Band-pass filters; Closed loop systems; closed-loop systems; controller modification; Fault detection; Fault diagnosis; feedback controller modification; feedback controllers; parametric faults; Transfer functions; Vectors; YJBK parameterization; YJBK-parameterization; Youla-Jabr-Bongiorno-Kucera parameterization

Main Research Area:

Science/technology

Publication Status:

Published

Series:

Proceedings of American Control Conference

Review type:

Peer Review

Conference:

2014 American Control Conference, 2014

Publisher:

IEEE

Submission year:

2014

Scientific Level:

Scientific

ID:

2201251027

Controller modification applied for active fault detection

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