Design of a failure tolerant control system via coprime factorization method

This paper deals with design of a failure tolerant control system where failures are identified using the normalized coprime factorization method. The identification method employed is a closed-loop one, which is also based on coprime factorization; therefore, the method is suitable to the robust control systems. The impact of failure on the closed-loop stability is evaluated by v-gap metric obtained from the estimated plant. To illustrate the effectiveness of the control and identification method, a simple design example and simulation results are shown.