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Controller modification applied for active fault detection

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Authors:
  • Niemann, Hans Henrik ;
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    Orcid logo0000-0002-1518-4979
    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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    Orcid logo0000-0002-8476-0052
    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

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