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为了准确预测航空陀螺电机寿命,利用对数正态分布函数来描述其寿命分布,采用最小二乘法(LSM)估计了对数均值、对数标准差及加速参数,对陀螺电机寿命是否服从对数正态分布进行了K-S检验,并利用自行开发的寿命预测软件计算出平均寿命和中位寿命。结果表明,航空陀螺电机寿命满足对数正态分布,其寿命特征和温度应力的关系符合阿伦尼斯方程,预测出的陀螺电机寿命精度较高,利用精确计算的加速参数可实现在短时间(10 h)内估算其寿命,为航空陀螺电机设计提供技术参考。
In order to accurately predict the life of an aeronautic gyro motor, logarithm normal distribution function is used to describe the life distribution. Logistic mean and logarithmic standard deviation and acceleration parameters are estimated by least square method (LSM) Normal distribution of the KS test, and the use of self-developed life prediction software to calculate the average life expectancy and median life. The results show that the life of the aeronautic gyro motor satisfies the logarithm normal distribution, the life characteristics and the temperature stress are in accordance with the Arrhenius equation, and the predicted gyro motor has higher life expectancy. The precise calculation of the accelerating parameter can be used to realize the short- 10 h) to estimate its life, providing a technical reference for the design of aeronautical gyro motor.