Mission reliability simulation modeling of space TT&C system based on DSPN
Yang Xiao-son · Journal of Aerospace Power · 2014
A general methodology for mission reliability modeling and analysis of space TTC system using DSPN was proposed to evaluate the TTC scenarios.By dividing the time sequences of TTC mission profile and taking into consideration of the complex situations which were difficult to be dealt with by other modeling methods such as phase dependency of TTC units,reparability of the system and different time intervals for various TTC units,the mission reliability of TTC system was modeled bycomponent-system logic-phasethree levels of Petri nets(PN)that could interact with each other.After simulating the DSPN model,the quantitative assessment mission reliability of TTC system for given TTC scenario can be obtained.The case study reveals that the simulation results have a good convergence with the increase of simulation numbers,and the errors are controlled with one percent compared with the analytical result of Markov analytic method.