无人水下航行器推进电机可靠性加速试验方法研究

Reliable Acceleration Test Method for Propulsion Motor of Unmanned Underwater Vehicle

目的用加速试验方法替代常规试验方法,达到缩短研制周期、节约研制成本、提高试验效率的目标。方法通过对推进电机的故障模式及影响分析,确定电机的绕组和控制驱动器的功率器件为薄弱部位,考虑到产品的水下应用环境,采用温度应力加速试验方法。结合绕组和功率器件与温度的数学模型及试验数据,计算出加速因子。结果设计了用173 h的满功率工作试验来考核产品平均无故障时间5500 h的可靠性加速试验方法。结论该试验方法对同类产品可靠性加速试验具有一定的借鉴意义。

Objective To shorten the development cycle, save the development costs and improve the test efficiency by replacing the conventional test method with the acceleration test method. Methods By analyzing the failure mode and ef-fects of the propulsion motor, the motor winding and the power devices of the drive module were determined as the weakest parts. Considering the underwater application environment of the product, temperature stress acceleration was adopted. The acceleration factor was calculated by the mathematical models and experimental data on winding, power devices and temperature. Results The reliability acceleration test method was designed based on 173 hours of full power work to assess the MTBF 5000 hours of the propulsion motor. Conclusion The test method can provide a reference for the similar products’ reliability acceleration test to some extent.