Fault tolerant system based on non-integers order observers: Application in a heat exchanger

This work presents a fault-tolerant (FT) scheme based on the application of non-integer order observers also called fractional observers, the case of study is a double pipe countercurrent heat exchanger (HE). The aim of the FT is to detect sensors faults as soon as possible, and to provide a healthy...

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Bibliographic Details
Published in:ISA transactions 2018-09, Vol.80, p.286-296
Main Authors: Alegría-Zamudio, M., Escobar-Jiménez, R.F., Gómez-Aguilar, J.F.
Format: Article
Language:English
Subjects:
Fault diagnosis and isolation
Fault tolerant system
Fractional observers
Heat exchangers
High-gain observers
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Summary:This work presents a fault-tolerant (FT) scheme based on the application of non-integer order observers also called fractional observers, the case of study is a double pipe countercurrent heat exchanger (HE). The aim of the FT is to detect sensors faults as soon as possible, and to provide a healthy signal in order to replace the faulty sensor signal by the fractional observer estimation. To develop the FT scheme a bank of high gain fractional order observers (HGFOO) is proposed. The Riemann-Liouville (RL) fractional derivative definition is used to solve each fractional observer. Experimental measures from a HE were used to test the performance of the fractional observers and the control scheme. The results show the robustness of the proposed observers. •Fractional high-gain observers design.•Fault toleran system based on fractional observers.•The robustness of the fractional observers to sensor faults.
ISSN:0019-0578
1879-2022
DOI:10.1016/j.isatra.2018.06.007