舵系统加速寿命试验方案优化设计

Design of Accelerated Life Test Optimized Plan for Missile Rudder System

论文对导弹舵系统的加速寿命试验方案进行了优化设计。优化设计过程以舵系统在贮存应力水平下,p阶分位寿命渐近方差最小作为优化设计的准则,以舵系统中位寿命渐近方差作为舵系统加速寿命试验方案优化目标函数。通过寻优计算,得到了导弹舵系统在温度和湿度两个试验应力作用,应力水平组合数为4和5时,其温度和湿度的应力水平、样本分配比例νi、每组试验截尾时间τi的最优值,并利用方差因子相对百分比确定了此时的合理测试次数为6。对优化方案进行的敏感性分析表明,优化试验方案对导弹舵系统的加速模型参数具有较好的鲁棒性。

The accelerated life test plan of a missile rudder system is optimized in this paper. According to this optimi- zation method, the design criterion is to minimize the P order division asymptotic variance of the rudder＇s life, so the optimi- zation objective function is asymptotic variance. Through optimization calculation, the optimal values of stress levels, the proportion vi of every group＇s distribution, the test time quantum ri of every group are worked out while different stresses of temperature and humidity are divided in 4 or 5 levels. The reasonable test number is 6 times comparing the variance factor relative percentage. Sensitivity analysis of the optimized plan shows that the plan has good robust to the parameters of the ac- celerated model.