Title: Fault diagnosis for actuators of an intensified multifunctional heat-exchanger from the view of both plant and component levels

Authors: Mei Zhang; Ze-tao Li; Qin-mu Wu; Boutaïeb Dahhou

Addresses: Electrical Engineering School, Guizhou Provincial Key Laboratory of Internet Plus Collaborative Intelligent Manufacturing, Guizhou University, 550025, Guiyang, China ' Electrical Engineering School, Guizhou University 550025, Guiyang, China ' Electrical Engineering School, Guizhou University 550025, Guiyang, China ' Univ de Toulouse, UPS, LAAS, F-31400 Toulouse, France

Abstract: This paper proposes a fault detection and diagnosis (FDD) approach to the nonlinear model of the intensified heat exchanger system locally and globally. It implements the optimal performances monitoring on both internal dynamics of each component and the global system. FDD of the actuator is triggered once faults occur. The recognition of cause and effect relationship between unexpected temperature behaviour and internal variables of the faulty control valves are investigated. Simulations are considered to confirm the effectiveness of the proposed strategy.

Keywords: fault diagnosis; control valve; intensified process; local fault filter; global performance monitoring; interconnected observer; invertibility; input reconstruction; local faulty variable identification.

DOI: 10.1504/IJMIC.2020.115390

International Journal of Modelling, Identification and Control, 2020 Vol.36 No.1, pp.1 - 13

Received: 06 May 2020
Accepted: 11 Jul 2020

Published online: 26 May 2021 *

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