基于KF-LSTM的轮轴横向力间接测量方法研究

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (13) : 254-267.

论文

孙昭意，陈建政，吴越，谢清林

作者信息 +

Indirect measurement method for wheel axle lateral force based on KF-LSTM

SUN Zhaoyi, CHEN Jianzheng, WU Yue, XIE Qinglin

Author information +

文章历史 +

摘要

轮轴横向力作为评价列车运行安全性的重要指标，对其进行服役状态下的在线监测尤为重要。本文结合卡尔曼滤波和长短时记忆网络算法（Kalman Filter & Long Short-Term Memory，KF-LSTM）发展了轮轴横向力间接测量模型。首先利用17自由度车辆横向动力学方程建立卡尔曼滤波算法的过程和观测方程，其次构建最优观测变量集进行间接测量，然后采用长短时记忆网络算法对列车测量效果较差位置处的横向力测量公式进行修正补偿，通过数值仿真与现场试验证明了提出KF-LSTM模型的有效性。结果表明：基于KF-LSTM方法可准确测量0～20 Hz频域范围内轮轴横向力，仿真线路中轮轴横向力序列预测值与仿真真实值的相关系数约0.85，平均绝对误差值约4.82 kN；现场试验中轮轴横向力序列预测值与测力轮对实测值的相关系数约0.84，平均绝对误差值约2.99 kN，并依据该测量方法设置该车辆在该条线路运行时轮轴横向力的预警标准，为工程设计和实践提供依据。

Abstract

The wheelset lateral force is an important indicator to evaluate the safety of the metro and it is significantly important to monitor the state online. An indirect measurement model of wheelset lateral force is developed by Kalman filter & Long short-term memory (KF-LSTM) algorithm. First, the process and observation equation of the Kalman filter are established by using the 17-degree-of-freedom lateral dynamics equation for the metro, and then the optimal observation variable is constructed for indirect measurement, and the long short-term memory network is used to measure the lateral force of the metro under the poor measurement results, the formula is corrected and compensated, and the validity of the KF-LSTM model is proved by numerical simulation and field trial. The result shows that: the wheelset lateral force can be accurately measured in the range of 0～20 Hz by KF-LSTM model. The correlation coefficient between the predicted value of the wheelset lateral force and the real value by simulation is about 0.85, and the average absolute error value is about 4.82 kN; The correlation coefficient between the predicted value and the force measured by instrument wheelset is about 0.84, and the average absolute error value is about 2.99 kN, and the warning standard is set while the metro is running on the line based on the method which provides practical guidance in engineering.

导出引用

孙昭意，陈建政，吴越，谢清林. 基于KF-LSTM的轮轴横向力间接测量方法研究[J]. 振动与冲击, 2024, 43(13): 254-267

SUN Zhaoyi, CHEN Jianzheng, WU Yue, XIE Qinglin. Indirect measurement method for wheel axle lateral force based on KF-LSTM[J]. Journal of Vibration and Shock, 2024, 43(13): 254-267

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