Research on On-Line In-Situ Calibration Technology for Bogie Rolling Vibration Test Bench

As one of the key components of heavy-duty electric locomotives, the bogie is closely related to the operational and safety performance of heavy-duty electric locomotives. In the design and manufacturing process of bogies, there are problems such as ineffective traceability and insufficient detection methods in large-scale specialized testing devices such as bogie rolling vibration test benches. Moreover, during the testing process, the measurement results are inevitably affected by load effects, mechanical wave interference, locomotive vibration, wheel hub distortion, and other factors; The existing traceability methods for bogie values adopt offline calibration, ignoring the influence of factors such as actual installation position, electromagnetic interference, and environmental disturbance, making calibration data difficult to apply. The author analyzed the basic structure and working principle of the rolling vibration test bench for heavy-duty electric locomotive bogies, and summarized a series of technical indicators that can comprehensively and objectively reflect the measurement characteristics of the test bench. The calibration items and specific testing methods of the test bench were clarified, and the most critical performance indicator torque of the test bench was selected for measurement uncertainty analysis. Finally, three test benches developed by CRRC Zhuzhou Machinery Co., Ltd. were selected for experimental verification, proving that the calibration method of the discussed test benches is scientific and reasonable.