Title :
Sensor and actuator fault diagnosis of quantised systems
Author :
Lunze, J. ; Schroder, J.
Author_Institution :
Inst. of Control Eng., Tech. Univ. Hamburg-Harburg, Hamburg, Germany
Abstract :
The paper describes a method for detecting and identifying faults that occur in the sensors and actuators of quantised dynamical system described by a qualitative model. The paper is based upon a solution to sensor and actuator fault diagnosis for systems with discrete input and outputs. The solution scheme is similar to the generalised observer scheme that has been proposed several years ago for continuous-variable systems. The applied scheme consists of two parts. The first part detects the existence of a sensor or actuator faults while the second is used for fault identification. It is shown that the models used in the observers can be obtained from the overall model of the quantised system in a simple way. Experimental results illustrate the proposed diagnostic method.
Keywords :
actuators; continuous systems; discrete event systems; fault diagnosis; observers; quantisation (signal); sensors; actuator fault diagnosis; continuous-variable systems; discrete event system; discrete input; discrete outputs; fault detection; fault identification; generalised observer scheme; qualitative model; quantised dynamical system; sensor; Actuators; Automata; Fault detection; Fault diagnosis; Mathematical model; Observers; Stochastic processes; discrete-event systems; fault diagnosis; qualitative modelling; stochastic automata;
Conference_Titel :
Control Conference (ECC), 2001 European
Conference_Location :
Porto
Print_ISBN :
978-3-9524173-6-2
