Reliability Analysis of Flexible Test System for the Products of Aerospace Pyromechanical Device Based on Dynamic Bayesian Network

摘要

The flexible test system for aerospace pyromechanical device products (PDPs) is an important mean to accurately assess the quality of aerospace-grade PDPs. Since aerospace PDPs are disposable products produced in small batch and multi-batch, only a limited number of samples can be tested to evaluate the quality level of the whole batch. Therefore, the reliability of ignition test system is concerned to ensure the reliability of limited test samples. The reliability of the test system is related to time and product batch task. Therefore, this paper proposes a dynamic Bayesian network method based on the combination of time and batch factors, and a test channel configuration optimization method is introduced to meet the reliability requirements of the batch change test, which provides an effective mean for evaluating the reliability of the test system. Numerical experiments show that the method can accurately reflect the reliability change of the flexible test system.