Abstract
This paper proposes a reliability monitoring scheme for active fault tolerant control systems using a stochastic modeling method. The reliability index is defined based on system dynamical responses and a safety region; the plant and controller are assumed to have a multiple regime model structure; and a semi-Markov model is built for reliability evaluation based on safety behavior of each regime model estimated by using Monte Carlo simulation. Moreover, the history data of fault detection & isolation decisions is used to update its transition characteristics and reliability model.
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