摘要
某型导弹电连接器属于高可靠性、长寿命产品,为了预测其寿命提出了基于Wiener模型的性能退化量分析方法。以电连接器的接触电阻作为性能参量,通过温度、湿度双应力加速退化试验获取了其性能退化数据。利用Wiener模型对样品退化轨迹进行拟合,使用广义艾林模型描述了样品寿命与温度、湿度之间的关系。使用极大似然估计的方法,对所有性能退化数据进行整体统计推断,估计出了模型参数,对电连接器进行了寿命预测。
For predicting the lifetime of a certain type of missile electrical connector, which is high-relia- bility and long-lifetime production, the approach of degradation data analysis based on Wiener model was accordingly proposed. Firstly, taking contact resistor as performance index, the performance degradation data was gotten through accelerated degradation test, in which temperature and relative humidity were ac- celerated stresses. Secondly, Wiener model was used to fit the degradation path, and then generalized Eyring model was utilized to set up relationship between sample lifetimes and accelerated stresses. Final- ly, with MLE method, the estimators of model parameters were obtained by integral statistics of all the performance degradation data. Furthermore, the lifetime of electrical connector was successfully predic- ted.
出处
《战术导弹技术》
2014年第1期42-45,共4页
Tactical Missile Technology
基金
国家自然科学基金(61273058)
