Abstract:

Both binary decision diagram (BDD) method and crude simulation method have limitation to evaluate the reliability of tracking, telemetering and command (TT&C) mission that has lots of TT&C resources and phases. Based on analyzing the mission reliability decrease in each single phase mission, an analytical model is proposed for solving the reliability of the TT&C mission. A fast simulation method for estimating the reliability of highly reliable mission systems, called forcing, is used to obtain the input data of the analytical model. Compared with BDD method and crude simulation method, the advantage on time efficiency of this mixed method is proved through an example. The mixed method combining analytical model and fast simulation method offers a feasible technique to evaluate the reliability of the TT&C mission which has huge number of TT&C resources and phases.