CRH2及CRH380A系列动车组速度传感器可靠性评估研究

提出了一种动车组列车速度传感器的寿命研究方法,通过对不同运行里程的速度传感器进行全寿命周期的环境影响分析,设计三综合性能退化寿命试验,缩短试验周期,并根据试验过程中测试参数的退化趋势,确定其寿命主要特征参数为线圈电阻.分析了不同里程速度传感器的特征参数试验结果,采用数据拟合及寿命里程等效估算的方法,预测速度传感器的寿命...

Reliability Evaluation of Speed Sensor for CRH2 and CRH380A Series EMU

The life research method of the speed sensor of the EMU was proposed in this paper. Through the environmental impact analysis of the whole life cycle of speed sensors with different operating mileage, three comprehensive tests for performance degradation life were designed to shorten the test cycle, and according to the degradation trend of test parameters during the test, the main characteristic parameter of the life was determined as coil resistance. The life of speed sensors was predicted through analyzing the test results of characteristic parameters of different speed sensors and using a method of data fitting and life-mileage equivalent estimation. The result shows that with the increase of operating mileage, the coil resistance gradually increases and insulation resistance gradually decreases at the same test time. It is estimated that the equivalent operating mileage of the three comprehensive test time is equivalent to 32.78 thousand kilometers per hour. The MTBF of the EMU speed sensor reaches 19.78 million kilometers in normal operation conditions. The research of this project also provides a method basis for rapid evaluation of speed sensor life.