Conference paper
Controller modification applied for active fault detection
Department of Electrical Engineering, Technical University of Denmark1
Automation and Control, Department of Electrical Engineering, Technical University of Denmark2
Aalborg University3
Department of Applied Mathematics and Computer Science, Technical University of Denmark4
Dynamical Systems, Department of Applied Mathematics and Computer Science, Technical University of Denmark5
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.
| Language: | English |
|---|---|
| Publisher: | IEEE |
| Year: | 2014 |
| Pages: | 1963-1968 |
| Proceedings: | 2014 American Control Conference |
| Series: | Proceedings of American Control Conference |
| ISBN: | 147993271X , 1479932728 , 1479932744 , 1479932752 , 9781479932719 , 9781479932726 , 9781479932740 and 9781479932757 |
| ISSN: | 23785861 and 07431619 |
| Types: | Conference paper |
| DOI: | 10.1109/ACC.2014.6858784 |
| ORCIDs: | Niemann, Hans Henrik and Poulsen, Niels Kjølstad |
Active fault detection Adaptive control Band-pass filters Closed loop systems Components, Circuits, Devices and Systems Fault detection Fault diagnosis Transfer functions Vectors YJBK parameterization YJBK-parameterization Youla-Jabr-Bongiorno-Kucera parameterization band-pass filter band-pass filters closed loop systems closed-loop systems controller modification fault diagnosis feedback feedback controller modification feedback controllers parametric faults
