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Type: Journal article
Title: Fault estimation sliding-mode observer with digital communication constraints
Author: Liu, M.
Zhang, L.
Shi, P.
Zhao, Y.
Citation: IEEE Transactions on Automatic Control, 2018; 63(10):3434-3441
Publisher: IEEE
Issue Date: 2018
ISSN: 0018-9286
Statement of
Ming Liu, Lixian Zhang, Peng Shi and Yuxin Zhao
Abstract: This paper addresses the actuator fault estimation sliding-mode observer (SMO) design problem of linear continuous-time systems over digital communication channels. This problem frequently occurred in a network environment where data has to be quantized before being transmitted via digital communication channels. Traditional observers (linear Luenberger observer, Walcott-ZaK SMO) are not effective to solve this design issue since the effects of signal quantization will degrade estimation performances evidently. In this paper, a new descriptor SMO method is presented to overcome this difficult problem. It is shown that, if the quantizer density is larger than √2-1, the designed observer can compensate quantization errors completely, and the fault vector can be reconstructed despite of signal quantization. Finally, a simulation example with the F-404 aircraft engine model is proposed to demonstrate the effectiveness of the proposed robust digital observer design approach.
Keywords: Digital communication channel; sliding-mode observer (SMO); state estimation
Rights: © 2018 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission. See for more information.
DOI: 10.1109/TAC.2018.2794826
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Appears in Collections:Aurora harvest 3
Electrical and Electronic Engineering publications

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