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FAULT DIAGNOSIS AND FAULT-TOLERANT CONTROL IN NONLINEAR SYSTEMS

ZHANG, XIAODONG
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1021937028

Abstract Details

2002, PhD, University of Cincinnati, Engineering : Electrical Engineering.
Fault-tolerance is an essential property of many modern intelligent control systems. This dissertation presents a general framework for fault diagnosis and fault-tolerant control in nonlinear dynamical systems in the presence of possibly unstructured modeling uncertainty. The overall architecture is based on a learning approach, where the unknown fault is estimated using adaptive and on-line approximation techniques. First, the problem of fault detection and isolation in nonlinear uncertain systems is investigated. A novel fault isolation scheme is presented with its robustness and sensitivity properties enhanced by the use of adaptive thresholds in the residual evaluation stage. The fault isolation scheme is rigorously analyzed for its fault isolability condition and fault isolation time. Then we integrate the fault diagnosis (fault detection and isolation) scheme with fault-tolerant control design. Based on the fault information obtained during the diagnosis procedure, the system controller is reconfigured after fault detection and fault isolation, respectively, to compensate the effects of the fault. The closed-loop stability of the integrated fault-tolerant control system is established for different modes of the controlled plant. The effectiveness of the proposed fault diagnosis and fault-tolerant control scheme is illustrated via simulations in the three-tank system, a rigid-link robotic manipulator and the van der Pol oscillator system.
Dr. Marios Polycarpou (Advisor)
167 p.
Fault Detection; Fault Isolation; Fault-Tolerant Control; Fault Accommodation; Nonlinear Systems

Recommended Citations

Citations

  • ZHANG, X. (2002). FAULT DIAGNOSIS AND FAULT-TOLERANT CONTROL IN NONLINEAR SYSTEMS [Doctoral dissertation, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1021937028

    APA Style (7th edition)

  • ZHANG, XIAODONG. FAULT DIAGNOSIS AND FAULT-TOLERANT CONTROL IN NONLINEAR SYSTEMS. 2002. University of Cincinnati, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1021937028.

    MLA Style (8th edition)

  • ZHANG, XIAODONG. "FAULT DIAGNOSIS AND FAULT-TOLERANT CONTROL IN NONLINEAR SYSTEMS." Doctoral dissertation, University of Cincinnati, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1021937028

    Chicago Manual of Style (17th edition)

ucin1021937028
2,054
© 2002, all rights reserved.
This open access ETD is published by University of Cincinnati and OhioLINK.