A New Way of Reliability Estimation Based on Markov Model for onboard Computer System
Yuan Chen-jun · Journal of Astronautics · 2007
The onboard computer adopted by internal aerospace department is a high dependable tolerant computer system,which was studied by internal researcher. The reliability plays an important role in onboard computer system.In this paper,a new statistical usage testing method of estimating the reliability of onboard computer system was put forward.First,the description method of induced states transitions in the Markov chain during testing was improved after analyzing the propagation.The condition that fault not always induces fail was described in Markov.Second,a probability computing method for execution paths of the program was proposed,which was used to evaluate the reliability of onboard computer system.Last,the validity of computing method was shown in the simulation experiment.In conclusion,testing and evaluating reliability of onboard computing system can reflect reality condition after analyzing the the induced states transitions and proposing the computing method of path probability.