轨道检测里程测量误差补偿算法研究
Study on Error Compensation Algorithm for Mileage Measurement in Track Inspection
高速铁路轨道检测基于轮轴编码器脉冲计数原理实现里程测量,测量误差随车辆运行里程增加而不断累积增大。为减小里程测量累积误差,首先分析轨道检测里程测量误差产生的原因,基于正负误差相消的思想提出误差补偿的乒乓算法;然后通过轨道检测综合试验标定台模拟试验,验证算法的有效性;最后在国家铁道试验中心环形铁道线采用实车试验,验证算法的实用性。结果表明:该算法在比较周期内最大里程测量累积误差为0.3 mm,完成1个比较周期,整体实现里程测量误差正负相消;该算法可适用于低分辨率的编码器,降低了轨道检测里程测量对编码器分辨率的要求;对于新造综合检测列车、现役轨道检查车和现役综合巡检车,车辆行驶100 km时,采用该算法轨道检测里程测量误差可分别减少约65,57和61 m。研究结果可为长大隧道、偏远山区特殊工况等无辅助定位条件下准确测量里程提供参考。
The track inspection of high-speed railway is based on the pulse counting principle of wheel axle encoder to measure mileage, and the measurement error accumulates and increases with the increase of vehicle operating mileage. To reduce the cumulative error of mileage measurement, the causes of mileage measurement errors in track inspection were analyzed first, and a ping-pong algorithm for error compensation was proposed based on the idea of positive and negative error cancellation. Then, the effectiveness of the algorithm was verified by simulation tests using the track inspection comprehensive test calibration platform. Finally, the practicality of the algorithm was verified by real vehicle tests on the circular railway line at the National Railway Test Center. The results show that the maximum accumulated measurement error is 0.3 mm within a comparison cycle, and the whole mileage measurement error can be cancelled out by positive and negative signals in one comparison period. The algorithm is applicable to lower-resolution encoders, which reduces the requirement for encoder resolution for track inspection mileage measurement. For the new-built comprehensive inspection trains, in-service track inspection vehicles, and in-service comprehensive inspection vehicles were compared. The track inspection mileage measurement error under 100 km condition can be reduced by approximately 65 m, 57 m, and 61 m, respectively. The algorithm is practical and can provide a methodological reference for accurate mileage measurement under special working conditions such as long tunnels and remote mountainous areas without auxiliary positioning.
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国家自然科学基金资助项目(52278465)
国家重点研发计划项目(2022YFB2602900)
中国国家铁路集团有限公司科技研究开发计划课题(N2022G051)
中国铁道科学研究院集团有限公司院基金课题(2023YJ024)
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