Fault diagnosis and accommodation of a three-tank system based on analytical redundancy.

This paper investigates the application of a fault diagnosis and accommodation method to a real system composed of three tanks. The performance of a closed-loop system can be altered by the occurrence of faults which can, in some circumstances, cause serious damage on the system. The research goal is to prevent the system deterioration by developing a controller that has some capabilities to compensate for faults, that is, the fault accommodation or fault-tolerant control. In this paper, a two-step scheme composed of a fault detection, isolation and estimation module, and a control compensation module is presented. The main contribution is to develop a unique structured residual generator able to isolate and estimate both sensor and actuator faults. This estimation is of paramount importance to compensate for these faults and to preserve the system performances. The application of this method to the three-tank system gives encouraging results which are presented and commented on in case of various kinds of faults.

[1]  Paul M. Frank,et al.  Fault diagnosis in dynamic systems using analytical and knowledge-based redundancy: A survey and some new results , 1990, Autom..

[2]  D. Theilliol,et al.  Fault-tolerant control method for actuator and component faults , 1998, Proceedings of the 37th IEEE Conference on Decision and Control (Cat. No.98CH36171).

[3]  Didier Theilliol,et al.  Fault-tolerant control in dynamic systems: application to a winding machine , 2000 .

[4]  Steffen Leonhardt,et al.  Methods of fault diagnosis , 1997 .

[5]  Michèle Basseville,et al.  Detection of abrupt changes: theory and application , 1993 .

[6]  P. Müller,et al.  Disturbance decoupled observer design: a unified viewpoint , 1994, IEEE Trans. Autom. Control..

[7]  Didier Theilliol,et al.  Fault-tolerant control of a nonlinear system application to a three-tank-system , 1999, 1999 European Control Conference (ECC).

[8]  Jie Chen,et al.  Robust Model-Based Fault Diagnosis for Dynamic Systems , 1998, The International Series on Asian Studies in Computer and Information Science.

[9]  Luis A. Aguirre,et al.  A modified observer scheme for fault detection and isolation applied to a poorly observed process with integration , 1998 .

[10]  P. M. Frank,et al.  Neural observer-based approach to fault-tolerant control of a three-tank system , 1999, 1999 European Control Conference (ECC).

[11]  Jaehong Park,et al.  On the representation of sensor faults in fault detection filters , 1994, Autom..

[12]  Youmin Zhang,et al.  Design of integrated fault detection, diagnosis and reconfigurable control systems , 1999, Proceedings of the 38th IEEE Conference on Decision and Control (Cat. No.99CH36304).

[13]  Janos Gertler,et al.  Fault detection and diagnosis in engineering systems , 1998 .

[14]  Marcello R. Napolitano,et al.  New technique for aircraft flight control reconfiguration , 1991 .

[15]  Jan M. Kohcielny.  Application of Fuzzy Logic for Fault Isolation in a Three-Tank System , 1999 .

[16]  P. Frank,et al.  Survey of robust residual generation and evaluation methods in observer-based fault detection systems , 1997 .

[17]  Rolf Isermann,et al.  Trends in the Application of Model Based Fault Detection and Diagnosis of Technical Processes , 1996 .

[18]  Gene H. Golub,et al.  Matrix computations , 1983 .