Control method for automatic wheel diameter calibration of motor train unit

Abstract

The invention discloses a control method for automatic wheel diameter calibration of a motor train unit. Aiming at the change of a wheel diameter actual value and a wheel diameter storage value in a control system caused by abrasion or other reasons of the motor train unit, a control system automatically performs wheel diameter calibration and automatically stores the wheel diameter after calibration is completed, so that manual control and manual new wheel diameter input are not needed, and the problems that wheel diameter data is distorted and cannot be automatically updated after being lostare solved. The method comprises the following steps: 1) monitoring the running state of a rail vehicle in real time according to a TCMS, and determining whether to execute automatic wheel diameter calibration or not; 2) enabling a traction control system to detect and confirm the error speed of the GPS, and to execute the automatic wheel diameter calibration after confirming that the speed of the GPS is normal; 3) selecting different calibration speeds according to different difference values between the actual measurement speed and the GPS speed; 4) performing integral calculation on a difference value between the vehicle speed provided by the GPS and the actually measured vehicle speed of the speed sensor, and adding the calibrated wheel diameter difference value and the existing stored wheel diameter to obtain a calibrated wheel diameter value, and 5) storing the calibrated wheel diameter value within an allowable range after the shortest calibration duration is executed.

Description

technical field [0001] The invention relates to a control method for wheel diameter automatic calibration of an EMU based on a vehicle control and management system (hereinafter referred to as TCMS) and a traction control system, belonging to the field of rail vehicle design. Background technique [0002] With the rapid development of EMU technology and the increase of operating speed, the requirements for automation design and control accuracy of rail vehicle electrical systems are also increasing. [0003] Existing rail vehicle TCMS and traction control systems need accurate wheel diameter values ​​as the basis and important parameters for speed calculation and running status detection to ensure safe and reliable operation of the vehicle. In particular, when wheel diameter changes due to normal or abnormal wear, or when stored wheel diameter data is lost due to reflashing of TCMS / traction control system software, automatic wheel diameter calibration is required to return t...

AI Technical Summary

Problems solved by technology

[0007] The control method for the automatic wheel diameter calibration of the EMU described in the present invention is designed to solve the above-mentioned problems in the prior art and propose an automatic calculation and calibration method for the wheel diameter during the operation of the rail vehicle to solve the problems in the prior art. For the problem of wheel diameter deviation due to wear or loss of wheel diameter data due to system software restart, the wheel diameter data is accurate after automatic calibration, which can ensure the implementation of subsequent protection functions such as vehicle speed control and accurate traction distribution.

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