In this paper, a new method of analyzing for the performance loss caused by faults in the systems is presented, and applied to the design of a fault tolerant longitudinal controller for a transit bus. Based on the amount of performance loss measured by a quadratic function, fault impact assessment is developed for both single and multiple faults. More specifically, ellipsoidal approximation of the tracking error bounds via dynamic surface control (DSC) is obtained via convex optimization technique for the nonlinear closed-loop system. Relying on the fault impact to the closed loop system and its isolatability on a fault detection and diagnosis system, the fault classification is proposed to provide a switching logic in the framework of a switched hierarchical structure. Finally, simulation results of the fault tolerant controller and corresponding fault classification are shown for multiple multiplicative faults.
Fault Tolerant Control and Classification for Longitudinal Vehicle Control
Contributed by the Dynamic Systems, Measurement, and Control Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT, AND CONTROL. Manuscript received by the ASME Dynamic Systems and Control Division February 7, 2002; final revision March 12, 2003. Associate Editor: Y. Chait.
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Song, B., Hedrick, J. K., and Howell, A. (September 18, 2003). "Fault Tolerant Control and Classification for Longitudinal Vehicle Control ." ASME. J. Dyn. Sys., Meas., Control. September 2003; 125(3): 320–329. https://doi.org/10.1115/1.1592188
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