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激光陀螺是一种由多种元器件组成的高可靠性、长寿命的光电器件,在可靠性评估中,可以依据最小薄弱环节定理,基于传统寿命试验,建立激光威布尔分布可靠性模型:但是由于其高可靠性的特点,在可靠性寿命试验中常常得不到失效数据,应用传统的参数评估方法不能对威布尔分布中的未知参数进行估计。贝叶斯原理得到各个时刻的失效概率,进而建立参数的线性回归模型对威布尔模型中的未知参数进行估计,从而得出激光陀螺的可靠性指标,最后对此种方法进行了验证。该方法中贝叶斯估计结合经验信息大大减小了试验样本数,且克服了传统可靠性评估方法依赖失效数据的缺点,在工程应用上具有很高的价值,结果表明了该方法的有效性。
Laser gyro is a kind of optoelectronic device with high reliability and long life composed of various components. In the reliability evaluation, the reliability model of laser Weibull distribution can be established based on the traditional life test based on the principle of least weak link: Due to its high reliability, failure data can not always be obtained in the reliability life test. The traditional parameter estimation method can not estimate the unknown parameters in Weibull distribution. Bayesian principle to obtain the failure probability of each moment, and then establish the linear regression model of parameters to estimate the unknown parameters of Weibull model, and then get the reliability index of laser gyro. Finally, this method is verified. The Bayesian estimation combined with empirical information greatly reduces the number of test samples and overcomes the shortcomings of the traditional reliability assessment method relying on the failure data. It has high value in engineering application and the results show the effectiveness of the method .