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| Motion Attitude Measurement Method of Bogie Based on Six Degrees of Freedom Vibration Table |
| HAN Zhi,CHEN Chun-Lei,FU Qiang,HAPO Jin-Fei,CHENG Zhao-Yang |
| Infrastructure Inspection Research Institute, China Academy of Railway Sciences Corporation Limited, Beijing 130022, China |
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Abstract Track geometry dynamic detection is an important means to ensure the safe operation of trains.The reliability of track geometry dynamic detection is affected by the veracity of motion attitude measurement results of vehicle bogie.In order to improve the accuracy of motion attitude detection results of vehicle bogie,a method of frame motion attitude measurement based on six degree of freadom shaking table was proposed.Different excitation signals are applied to the bogie.Four triaxial accelerometers are used to collect acceleration signals.The acceleration signal is converted to simulate the displacement and rotation of bogie's geometric center through the frequency domain integration method of fast Fourier transform and attitude calculation algorithm based on displacement data.The verification test of bogie attitude measurement method was carried out with the input signal of six degree of freadom shaking table as the standard.The results show that the lateral displacement,vertical displacement,roll and swing root mean square difference of bogie attitude measurement algorithm are less than 0.04mm,0.03mm,0.05° and 0.03° respectively.
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Received: 02 December 2021
Published: 18 April 2023
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2023, Vol. 44 
