不完全Gamma分布下弹簧触指的可靠性寿命评估
Reliability Life Assessment of Spring Contact with Incomplete Gamma Distribution

针对高压断路器固封极柱内滑动联接用弹簧触指在极小样本无失效情况下的可靠性试验评估问题，采用不完全Gamma分布作为弹簧触指失效率的先验分布，基于多层Bayes可靠性评估方法建立概率模型，根据最小二乘法求出二参数Weibull分布中的待定参数，得到弹簧触指可靠性数学模型。研究结果验证了不完全Gamma分布作为失效率先验分布运用到多层Bayes方法可靠性评估中的合理性，为弹簧触指的可靠性评估提供了一定的理论指导。
For the problem of reliability evaluation of the spring contact used in sliding connection of high-voltage circuit breaker's embedded pole in the case of minimum sample and zero-failure reliability test evaluation, the incomplete gamma distribution is adopted as a prior distribution of the spring contact failure probability, the mathematical model of accumulation failure probability is established based on the hierarchical Bayesian reliability assessment method. According to the least square method, the undetermined parameters of the two parameter Weibull distribution are solved and the reliability mathematical model is obtained for the canted spring contact. The results verify the reasonable of applying the incomplete gamma distribution to the reliability evaluation of the hierarchical Bayesian, which provides a guide for evaluating the reliability of spring contact