Handling fault in ambient temperature measurements in a cooling system - A fault tolerant control approach

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Abstract

This paper proposes an active fault tolerant control (AFTC) scheme for detecting and correcting faulty measurements from the ambient temperature sensor that is utilized to calculate the optimal setpoints for a rooftop gas cooler unit operation. The faulty measurements are caused by improper placement of the ambient temperature sensor so that it is exposed to heat generated directly or indirectly by the sun. The AFTC is designed in a plug & play manner with no prior knowledge of the underlying system. The underlying system is identified by applying an online identification algorithm. To ensure the validity of the model several criteria is established. The resulting model is utilized in an observer based fault tolerant controller scheme including a bumpless implementation of the fault correction when a fault has been detected. The validity of the proposed AFTC scheme is investigated using both experimental data as well as simulation.

Original languageEnglish
Book seriesIFAC-PapersOnLine
Volume55
Issue number6
Pages (from-to)61-66
Number of pages6
ISSN2405-8963
DOIs
Publication statusPublished - 2022
Event11th IFAC Symposium on Fault Detection, Supervision and Safety for Technical Processes, SAFEPROCESS 2022 - Pafos, Cyprus
Duration: 8 Jun 202210 Jun 2022

Conference

Conference11th IFAC Symposium on Fault Detection, Supervision and Safety for Technical Processes, SAFEPROCESS 2022
Country/TerritoryCyprus
CityPafos
Period08/06/202210/06/2022

Bibliographical note

Publisher Copyright:
© 2022 Elsevier B.V.. All rights reserved.

Keywords

  • ambient temperature
  • fault tolerant control
  • online system identification
  • play
  • plug
  • refrigeration system

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