A new reliability evaluation method for spaceflight telemetry, tracking and control system
This paper presents a new approach to evaluate the reliability of the space flight telemetry, tracking and control (TT&C) system which is a complex and repairable phased-mission system. It is difficult to use existing analytical approaches to evaluate the reliability of repairable phased-mission systems as the number of components increases to a large scale. This paper presents a simple “path-vector” model with considering only effective states which is a tiny part of all states. Hence this model is able to avoid huge-scale sparse matrix which must be computed in traditional Markovian methods. Compared with the Markov-BDD approach, the proposed model eliminates the need to find an appropriate but cumbersome BDD ordering strategy, which greatly simplifies the model development. The effectiveness and correctness of our approach is analyzed by comparing with the simulation result.