飞行器火工品加速贮存寿命试验与评估方法

飞行器火工品是一种高可靠长寿命产品,为提高小样本量下飞行器火工品贮存寿命评估精度,通过对贮存寿命影响因素进行分析,建立了加速贮存寿命模型以描述火工品贮存寿命与贮存温度的关系,并将感度试验和加速试验相结合,给出了一种适用于飞行器火工品的加速贮存寿命试验与评估方法。依据火工品加速后的感度试验数据,基于广义线性模型给出了感度分布参数的极大似然估计,进而根据参数估计的渐近正态特性对飞行器火工品进行了贮存寿命评估。将该方法应用于某飞行器火工品。通过利用样本量约为150、周期约为40天的试验获得的数据,可对贮存寿命要求为15年以上的飞行器火工品进行有效评估。

Accelerated Storage Life Test and Assessment Method for Explosive Initiator used on Aircraft

The explosive initiator used for aircraft is a product with high reliability and long life. In order to improve the storage life assessment precision of small sample size explosive initiator, through the analysis of the influence factors on storage life, an accelerated storage life model describing the relation of storage life and storage temperature for explosive initiator was established and a method suited for testing and evaluating the accelerated storage life of explosive initiator used for aircraft was proposed via a combination of sensitivity test and accelerated test. Based on the sensitivity test data of explosive initiator after acceleration and generalized linear model, the maximum likelihood estimations of the sensitivity distribution parameters were given. Then, the storage life assessment of explosive initiator used for aircraft was performed according to approximate normal characteristics of parameter estimations. The method was applied to one aircraft explosive initiator. The results show that the effective evaluation of explosive initiator required to store more than 15 years can be carried out via test data obtained by a sample size of about 150 and a period of about 40 days.