轨检车体加速度系统服役状态动态校准方法OA

The measurement accuracy of the track inspection car body acceleration system is affected by multiple factors,including vehicle vibration,sensor sensitivity drift,and micro-variations in the mechanical structure at the installation position,leading to measurement errors.To evaluate the system status and correct test results during its operational state,a dynamic calibration method for the track inspection car body acceleration system is proposed.First,a mathematical model is established based on system identification and prediction methods,using measurement data from a miniaturized transfer device as the reference to predict and correct the data from the track inspection car body acceleration system.Then,an online verification method is applied to evaluate and analyze the data before and after correction,demonstrating the feasibility of the data correction process.Experimental results show that after system identification and correction,the correlation coefficient of the track inspection car body acceleration data is improved by up to 6.9%,the RMSE is reduced by up to 34.1%,the MAE is optimized by up to 27.3%,and the 95th percentile is improved by up to 45.2%.This method significantly enhances the accuracy and reliability of the measurement data from the track inspection car body acceleration system.