Regular Papers
International Journal of Control, Automation and Systems 2020; 18(12): 3159-3166
Published online June 24, 2020
https://doi.org/10.1007/s12555-019-0870-2
© The International Journal of Control, Automation, and Systems
Robust Fault Diagnosis Observer Design for Uncertain Switched Systems
In order to improve the fault diagnosis theory of switched systems, observer-based method is proposed to deal with the fault diagnosis issue subjected to the parameter uncertainty, unknown process disturbances and unexpected faults. By employing proportional-integral observer (PIO) technique and the average dwell-time (ADT) method, an H∞/H− performance level is considered to ensure the worst case of robustness to the disturbance and sensitivity to the fault simultaneously. Moreover, the obtained fault diagnosis observer can give accurate fault estimation online for the piecewise constant fault. Finally, a two-tank system example is introduced in the end to show the effectiveness of the proposed results.
Download: http://link.springer.com/article/10.1007/s12555-019-0870-2
Keywords Fault detection, fault estimation, PIO, switched system.
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Regular Papers
International Journal of Control, Automation and Systems 2020; 18(12): 3159-3166
Published online December 1, 2020 https://doi.org/10.1007/s12555-019-0870-2
Copyright © The International Journal of Control, Automation, and Systems.
Robust Fault Diagnosis Observer Design for Uncertain Switched Systems
Dongsheng Du*, Yue Yang, Huanyu Zhao, and Yushun Tan
Huaiyin Institute of Technology
Abstract
In order to improve the fault diagnosis theory of switched systems, observer-based method is proposed to deal with the fault diagnosis issue subjected to the parameter uncertainty, unknown process disturbances and unexpected faults. By employing proportional-integral observer (PIO) technique and the average dwell-time (ADT) method, an H∞/H− performance level is considered to ensure the worst case of robustness to the disturbance and sensitivity to the fault simultaneously. Moreover, the obtained fault diagnosis observer can give accurate fault estimation online for the piecewise constant fault. Finally, a two-tank system example is introduced in the end to show the effectiveness of the proposed results.
Download: http://link.springer.com/article/10.1007/s12555-019-0870-2
Keywords: Fault detection, fault estimation, PIO, switched system.
Vol. 22, No. 12, pp. 3545~3811
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