Experimental study on the comprehensive test bench of high-speed train cabinet-end relationship

To verify whether the comprehensive test bench of cabinet-end relationship for high-speed train can meet the demand or not, the positioning precision, maximum motion range, forward kinematics, dynamic tracking performance and maximum output speed tests were carried out. The results indicate that the maximum positioning error of translational motion is 0.1 mm and the maximum positioning error of rotation motion is 0.1°, far superior to the actual demand. The forward kinematics of the Stewart parallel manipulator is precise enough and can be used for monitoring the real-time state of the system. In the dynamic tracking test, the maximum aptitude attenuation and the maximum phase lag occur in the Y direction, 0.755 dB and 25.92°, respectively, significantly better than the amplitude attenuation 3 dB and phase lag 90°. The maximum output speed of three translational motion can meet the 0.2 m/s requirement. The results show that cabinet-end relationship comprehensive test bench can fully meet the demand of the high-speed train cabinet-end relationship test and has space for further improving performance.