维修时间截尾序贯验后加权检验的实现

Realization of Truncated Sequential Posterior Odd Test of Maintenance Time

截尾序贯验后加权检验是一种小子样检验方法,可用于装备维修性指标的验证。对于此检验方法,当需要求解决策阈值时,现有的基于数值逼近原理的方法存在的难题是积分变量中含有正态分布积分函数,它没有解析表达式,因此不能直接进行积分运算。为此,在满足检验精度的情况下,尝试将积分变量中的正态分布积分函数替换为与之近似的解析表达式,从而给出了一种求解决策阈值的可行方法。对某导弹平均修复时间指标进行验证的实例表明该方法是有效的。

The truncated sequential posterior odd test can be used for maintainability index verifieation. As to SPOT） is a small sample test method which s method, when it is necessary to figure out the threshold value for deciding whether the maintainability of the equipment will be accepted, the exist- ing method based on digital approximation principle has a difficulty that the integration variables contain normal distribution integration functions, which have no analytic expression. Therefore, it is impossible to do integral operation directly. Aiming at solving the problem, an attempt to replace each normal distri- bution integration function with an analytic expression approximate to the function is made and thus it presents a feasible way to figure out the threshold value for decision without decreasing the test accuracy. The verification of mean time to repair （MTTR） index of some missile shows that this method is effective.