关键词: 校准, 轮径, 牵引控制, 轮径差

Abstract: During the operation of subway vehicles, with the wheel wear, there will be differences between the true wheel diameter value and the wheel diameter value stored in traction control unit (DCU). When the difference is too large, idling/sliding, traction blocking and other faults will occur, resulting in abrasion of the wheel set and affecting the train operation. In this case, the wheel diameter calibration is required to update the wheel diameter value stored in DCU to reduce the wheel diameter difference. Train wheel diameter calibration needs to meet many preconditions, and in fact, many practical operation lines cannot reach the conditions of wheel diameter calibration. Based on the schematic diagram of train wheel diameter calibration control logic, this paper analyzes the principle and condition of wheel diameter calibration process, and guides the operation and maintenance of subway vehicles.

Key words: calibration, wheel diameter, traction control, wheel diameter difference