摘要
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。
The laser gyroscope is a kind of high reliability,long life photovoltaic device which is composed of a variety of components.In the reliability evaluation,the Weibull distribution model is established as the reliability model of the erbium-doped fiber laser in accordance with the smallest weak link theorem,which is based on the traditional life test.However,due to its characteristics of high reliability,the failure data is usually not gotten from the reliability life test.So the traditional parameter estimation method can't estimate the unknown parameters of the Weibull distribution.The principle of Bayesian is applied to get the probability of failure of each moment,and then is used to estimate the unknown parameters in the Weibull model by establishing the parameters of the linear regression model,to arrive at the reliability index of laser gyroscope.Finally,this method is verified.The method greatly decreases the number of test samples because of Bayesian estimation has taken advantage of experience information,and it overcomes the shortcoming of relying on failure data when using traditional reliability assessment methods.So it has great value on project application.
出处
《导航与控制》
2016年第2期51-56,共6页
Navigation and Control
关键词
激光陀螺
可靠性
贝叶斯
无失效数据
laser gyroscope
reliability
Bayesian
zero failure data
