Threshold design for fault detection with first order sliding mode observers

Twan Keijzer, Riccardo M.G. Ferrari*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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Abstract

Sliding Mode Observer (SMO) based methods have been extensively used for Fault Estimation (FE). However, the fault detection (FD) problem for these SMO based FE methods has not been completely solved. In this paper a robust threshold on the so-called Equivalent Output Injection (EOI) is presented which enables FD for systems with measurement noise and unmatched uncertainties. This threshold is applicable to a large class of existing SMO based FE methods, and its applicability can easily be verified. Theoretical guarantees on the detection performance of this threshold are provided, and further demonstrated via a simulation study.

Original languageEnglish
Article number110600
Number of pages9
JournalAutomatica
Volume146
DOIs
Publication statusPublished - 2022

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