The train braking system with redundant components has an essential effect on driver safety. In this paper. we consider the failure of K-out-of-N brake motors during operation and the redundant recovery by preventive maintenance. Two Continuous Time Markov Chains (CTMC) are used to model the working process and the preventive maintenance process of the braking system corresponding to ... https://yeswellneses.shop/product-category/kitchen-tools/