现场信息的可靠性参数评估

THE RELIABILITY PARAMETER ESTIMATION OF FIELD INFORMATION

为充分利用航空产品现场使用中获得的可靠性信息,多年来对现场信息的特点进行了研究,在参数的点估计方面完善了一套处理方法。为使其评估结果付诸实用,用统计分析的方法对MTBF(平均故障间隔小时)的点估计结果进行了修正,并针对现场信息随机截尾的特点,推导了随机截尾子样的区间估计及单边下限估计的公式,以运七飞机机载成品为例给出了参数的计算值。

The feature of field information has been investigated for many years in order to fully utilize the reliability information of aviation products obtained in the field and a set of perfect processing method for parameter point estimation of MTBFs has been established.In this paper,the point estimation are modified with statistical analysis method for practical applications.The formulae of interval estimation and one-sided lower limit estimation concerning random censored sample are derived.The caculated results of parameter of the air borne iteems of YUN-7 are given as examples.