Abstract:
Objective To ensure trains smoothly accelerate and decelerate during traction/braking processes, animpact-type tests must be conducted before train delivery. To address the challenge of selecting impact rate testing methods during traction/braking in impact-type tests, a comparative analysis framework based on accelerometer-based method and speed method is proposed, to optimize the test method selection and enhance the result reliability.
Method Through impact-type tests on trains, impact rates generated during traction/braking process under multiple operating conditions are investigated emphatically. A detailed comparative analysis is conducted using a specific train model, examining the accelerometer-based and speed two common testing methods. Statistical methods are employed to analyze differences and tendencies in results between both methods across various operating conditions. After eliminating the influence of equipment errors, a chi-square test confirmed statistically significant differences between the two algorithms are identified.
Result & Conclusion Comparative analysis revealed significant differences in pass rates between the two methods: the speed method shows markedly higher pass rates than the accelerometer-based method under identical conditions. This indicates that the accelerometer-based method offers superior reliability and applicability for testing train impact rates. Where conditions permit, the accelerometer-based method should be prioritized for impact rate testing during traction/braking process.