TY - GEN
T1 - Controller modification applied for active fault detection
AU - Niemann, Henrik
AU - Stoustrup, Jakob
AU - Poulsen, Niels Kjølstad
PY - 2014/1/1
Y1 - 2014/1/1
N2 - 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.
AB - 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.
KW - Active fault detection
KW - controller modification
KW - feedback controllers
KW - parametric faults
KW - YJBK parameterization
U2 - 10.1109/ACC.2014.6858784
DO - 10.1109/ACC.2014.6858784
M3 - Article in proceeding
AN - SCOPUS:84905686876
SN - 9781479932726
T3 - American Control Conference
SP - 1963
EP - 1968
BT - American Control Conference (ACC), 2014
PB - IEEE Signal Processing Society
T2 - 2014 American Control Conference (ACC)
Y2 - 4 June 2014 through 6 June 2014
ER -