Fault diagnosis in nonlinear dynamical systems based on left invertibility condition: A real-time application to three-tank system

This paper is concerned with the active fault tolerant control (FTC) problem for an Internet-based networked threetank system (INTTS) serving as a benchmark system for evaluating networked FTC algorithms. The INTTS has two parts located at Tsinghua University in China and at the University of South Wales in the UK, respectively, which are connected via Internet. With the INTTS as an experimental platform, the active FTC problem is investigated for a class of nonlinear networked systems subject to partial actuator failures. A binary switching random sequence with a known distribution is employed to describe the packet dropout phenomena induced by network cables with limited-capacity.Once a specific actuator failure is detected and confirmed by a fault diagnosis unit, the control law is then reconfigured based on the information of the detected fault. Both the stability and the H ∞ disturbance attenuation performance are guaranteed for the closed-loop system by using the remaining reliable actuators. Extensive experiments are carried out on the active fault tolerant control problem of the INTTS with partial actuator failures and the effectiveness of the proposed scheme is illustrated. KeywordsActive fault tolerant control, Internet-based networked three-tank system, actuator failure, controller reconfiguration, random packet dropout.

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“…Based on this benchmark system, much work has been done on FDD and/or FTC problems, see e.g. [3][4][5][6][7][8][9].…”

Section: Fig 1 a Benchmark System: Dts 200mentioning

confidence: 99%

Active Fault-Tolerant Control for an Internet-Based Networked Three-Tank System

Wang

Qin

et al. 2016

IEEE Trans. Contr. Syst. Technol.

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“…Mata-Machuca J.L. [13] discussed the fault diagnosis problem, some new properties are found using the left invertibility condition through the concept of differential output rank. Whereas, Zhou D. H. etc.…”

Section: Introductionmentioning

confidence: 99%

A Teamwork Fault Detection Scheme for Five-tank System

ZHENG¹

2017

dtetr

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This paper investigates a leakage fault problem for a MIMO nonlinear five-tank system which is a benchmark experimental facility for research purpose in industrial process control domain. A Teamwork Fault Detection Scheme (TFDS) is proposed in this note. In this scheme, two fault detectors (FDs) are designed. Each FD monitors three tanks, while sharing a tank. In order to avoid the consensus-less or non-cooperative case in traditional fault detection scheme, the presented FDs in this paper can be allowed to exchange their captured system information in the process of fault detection, so that the capability of fault detection is greatly improved. It is mainly due to a fact that the designed FDs don't run independently, but take the way of cooperation with more diagnostic knowledge. Moreover, the derivation of rigorous analytical results for the fault detectability is given. Finally, simulation results are given to show the effectiveness of the provided scheme.

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