【摘要】 对高可靠性、长寿命的电子式漏电断路器建立基于Wiener过程的剩余寿命预测模型并对其进行可靠性预测。首先对电子式漏电断路器进行以温度为加速应力、剩余动作电流值为退化特征量的恒定应力加速退化试验,根据试验数据描述其性能退化轨迹,分析性能退化规律;然后对加速退化试验数据进行正态分布检验,验证其符合Wiener过程,利用极大似然估计的方法,对剩余寿命预测模型进行参数估计,预测出漏电断路器的剩余寿命;将漏电断路器初始时刻的剩余寿命作为伪失效寿命,外推出漏电断路器在正常应力下的使用寿命大约为2 085天。更多还原

【Abstract】 For high-reliability, long-life electronic leakage circuit breakers, a residual life prediction model based on Wiener process is established to predict its reliability. First, the constant stress accelerated degradation test is carried out for the electronic leakage circuit breaker, with temperature as the accelerated stress and residual operating current as the degradation characteristic quantity. According to test data, its performance degradation trajectory is described, and the performance degradation rules are analyzed. Then, the test data of the accelerated degradation are checked by normal distribution to verify that it conforms to the Wiener process. The maximum likelihood estimation method is used to estimate the parameters of the residual life prediction model and predict the residual life of the leakage circuit breaker. Taking the remaining life of the circuit breaker at the initial moment as the pseudo-failure life, it is extrapolated that the life under normal stress is about 2 085 days.更多还原