Reliability assessment of the Missile system based on Bayesian network

The Tactical Missile is a complex system with a large number of components, with characteristics of high reliability, long storage life. Due to the limitation of the samples of the missile, the traditional method of modeling and evaluating based on mathematical statistics has a lot of shortcomings. Therefore, according to the Bayesian network method, we use the principle of physics of failure analysis to establish the assessment model from the components to the system. The work of the paper mainly includes the following contents. First, the failure modes and the sensitive environmental stress are qualitatively and quantitatively analyzed to determine the main influencing factors of the system failure at work. Second, according to the system function to establish the system function flow chart, the data is divided into different styles based on the physics of failure. According to the test results, the likelihood function is established. Third, based on the Bayesian network and combined with the system function, the paper establishes the qualitative and quantitative Bayesian network model from the component to the system, from the bottom node to the high node. According to the test data, the evaluation and verification of the system life parameters are carried out.