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某型陀螺仪是影响武器控制舱贮存寿命的薄弱环节,针对历年统计的陀螺仪的成败型、不完全故障数据,将“保序回归”和“变样本Pearson?2拟合优度检验与极小卡方估计”相结合,得到了其寿命分布函数。结果显示,I型极大值和威布尔分布适用于陀螺仪的寿命分布,但I型极大值不具有可加速性,因而选择威布尔分布作为寿命分布。根据统计数据计算,得到了置信度0.90和可靠度0.95时陀螺仪自然贮存寿命为22.30年,得到了陀螺仪在90℃下的加速系数K=7.2695,预估了2009年和2011年生产的陀螺仪加速寿命试验时间分别为8.25月和11.56月,对加速寿命试验时间规划、经费预算具有工程实际意义。
A certain type of gyroscope is the weak link that affects the storage life of the weapon control module. According to the statistics of the success or failure of the gyroscope over the years and the incomplete fault data, the Pearson? 2 goodness-of-fit Test and minimal chi-square estimation ", we get the life distribution function. The results show that type I maxima and Weibull distribution are suitable for the lifetime distribution of gyroscopes, but type I maxima are not accelerable, so the Weibull distribution is chosen as the life distribution. According to the statistical data, the gyroscope’s natural storage life is 22.3 years when the confidence level is 0.90 and the reliability is 0.95. The acceleration coefficient K = 7.2695 of the gyroscope at 90 ℃ is obtained. The gyroscopes produced in 2009 and 2011 are estimated. Instrument accelerated life test time were 8.25 months and 11.56 months, accelerated life test time planning, budget has a practical significance.