Simulation analysis of outage recovery time of navigation satellite

Outage recovery time is an important factor affecting the availability of navigation satellite. In order to effectively estimate the outage recovery time of satellite on orbit at the design stage, this paper analyses the specific process of outage recovery, and puts forward the modelling and analysis method of outage recovery time according to the characteristics of outage recovery process. In this paper, outage recovery time is divided into fault detection time, fault location time, fault handling time, state recovery time and access system time. By using the correlation analysis method, the equipment that may cause outage can be located quickly. Taking the recovery time corresponding to a certain recovery strategy as the input, the recovery time on the satellite can be obtained by weighting the recovery time and failure rate. Considering the randomness of outage recovery process, state flow graph is used to model and simulate the recovery time. Finally, an example of simulation analysis is given.