Publication
Combining set-theoretic UIO and invariant sets for optimal guaranteed robust fault detection and isolation
Journal Article (2019)
Journal
Journal of Process Control
Pages
155-169
Volume
78
Doc link
https://doi.org/10.1016/j.jprocont.2019.04.004
File
Abstract
This paper proposes an optimal guaranteed robust fault detection and isolation (FDI) method combing the set-theoretic unknown input observer (SUIO) and the robust positively invariant (RPI) sets for linear time-invariant (LTI) systems. The optimality of the proposed FDI method is achieved under a two-layer framework. The first layer allows to design a single optimal FDI-oriented SUIO with RPI set separation-based guaranteed FDI conditions to reduce the FDI conservatism of single observer. The second layer consists in designing an optimal observer configuration for a bank of optimal SUIOs to reduce the FDI conservatism of all the SUIOs together. Finally, the effectiveness of the proposed guaranteed robust FDI method is illustrated by using a four-tank system.
Categories
control theory.
Scientific reference
F. Xu, J. Tan, Y. Wang, V. Puig and X. Wang. Combining set-theoretic UIO and invariant sets for optimal guaranteed robust fault detection and isolation. Journal of Process Control, 78: 155-169, 2019.
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