Threshold design for fault detection with first order sliding mode observers

Twan Keijzer; Riccardo M.G. Ferrari

doi:10.1016/j.automatica.2022.110600

Threshold design for fault detection with first order sliding mode observers

Twan Keijzer, Riccardo M.G. Ferrari^*

^*Corresponding author for this work

Team Riccardo Ferrari

Research output: Contribution to journal › Article › Scientific › peer-review

4 Citations (Scopus)

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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 language	English
Article number	110600
Number of pages	9
Journal	Automatica
Volume	146
DOIs	https://doi.org/10.1016/j.automatica.2022.110600
Publication status	Published - 2022

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10.1016/j.automatica.2022.110600

1-s2.0-S0005109822004629-mainFinal published version, 701 KBLicence: CC BY

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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.",

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AB - 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.

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Threshold design for fault detection with first order sliding mode observers

Abstract

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Advances in Safety and Security of Cyber-Physical Systems: Sliding Mode Observers, Coalitional Control and Homomorphic Encryption

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