A Teamwork Fault Detection Scheme for Five-tank System

Abstract

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.