Reliability Estimation of Aviation Pyrotechnics System Based on Mixed Beta Distribution

• 作 者: 赖岳华 董海平 程涛 杨树彬
• 机 构: School of Mechatronical Engineering,Beijing Institute of Technology,The 213th Research Institute of
• 出 处: Journal of Donghua University(English Edition)
• 发表日期: 2014年06期

For evaluating reliability of an aviation pyrotechnics system,a Bayesian reliability estimation method utilizing reliability information of a system and its units was put forward. Firstly,an inheritance factor was determined by chi-square goodness of fit test.Then the mixed prior distribution was obtained based on the inheritance factor. Finally, the density function of posterior distribution was obtained and used to assess the reliability of system.According to the new method, the reliability of an aviation pyrotechnics system was evaluated to reach 0. 989 6 at the confidence level of 0. 90. To reach the reliability index,the required numbers of trials of system and its units were given. It is instructional to apply the new method on the reliability estimation of aviation pyrotechnics systems.

For an evaluating reliability of an aviation pyrotechnics system, a Bayesian reliability estimation method utilizing reliability information of a system pyramid and its units was put forward. Firstly, an inheritance factor was determined by chi-square goodness of fit test. based on the inheritance factor. Finally, the density function of posterior distribution was obtained and used to assess the reliability of system. According to the new method, the reliability of an aviation pyrotechnics system was evaluated to reach 0. 989 6 at the confidence level of 0. 90. To reach the reliability index, the required numbers of trials of system and its units were given. It is instructional to apply the new method on the reliability estimation of aviation pyrotechnics systems.