Weibull寿命模型下火箭发动机可靠性增长试验的LS-Bayes分析

基于液体火箭发动机可靠性增长试验的特点,结合数理统计中的线性回归方法对新阶段试验下发动机的可靠性试验结果进行预测.结合发动机的少量现场试验数据,利用Bayes方法对Weibull寿命型火箭发动机的可靠性增长试验结果进行评定.首先给出了可靠性增长分析的模型,然后运用历次阶段试验中的可靠性增长数据建立动态参数的递推估计模型,在此基础上,运用随机变量函数的分布,给出各阶段可靠性增长试验中可靠度的Bayes估计.

The LS-Bayes Analysis for Rocket Engine Reliability Growth Test under Weibull Life Model

This paper,based on the characteristics of rocket engine reliability test,use liner model and regression method to forecast the measurement parameters in weibull distribution model,see ,in the new stage reliability test. Then it uses Bayesian method and combines with a little field test data to evaluate the reliability parameters of rocket engine. In the article,first,the reliability growth analysis model is present,and then with the reliability growth test data, a dynamic parameter iterative evaluation model is built. With the iterative model and field test data,the reliability evaluation of every stage can be calculated out by Bayesian formula. Based on the distribution of function of the random variable,the reliability evaluation is given.