Optimal adhesion control method based on optimal creep speed searching and tracking

Abstract

The invention discloses an optimal adhesion control method based on optimal creep speed searching and tracking. The method comprises a full state observer, a reference creep speed searching module andan MPC adhesion controller, wherein the full state observer is used for estimating a locomotive adhesion coefficient by utilizing the traction torque of a motor and the wheel pair rotating speed; thereference creep speed searching module is used for judging a locomotive running condition according to the adhesion coefficient and the creep speed of the locomotive, adjusting the reference creep speed and searching the optimal creep speed of a current track surface, and outputting the searched reference creep speed to the MPC adhesion controller; and the MPC adhesion controller is used for predicting the optimal traction torque in real time under two signal conditions of the given reference creep speed and the actual creep speed in combination with the motor control torque constraints, creep speed constraints and a driving performance index, and outputting the optimal traction torque to the locomotive in order to realize the tracking of the optimal creep speed. According to the method,the maximum adhesion force is obtained, the adhesion utilization rate is improved, and meanwhile, the requirements for a traction system are met.

Description

technical field [0001] The invention relates to locomotive traction control technology, in particular to an optimal adhesion control method based on optimal creep speed search and tracking. Background technique [0002] Due to its large capacity and high traction power, heavy-duty locomotives have always played an important role in rail transportation, especially cargo transportation, and are also the best way to transport large cargo. With the development of the economy, my country's demand for heavy-duty freight and the requirement for locomotive traction power are also getting higher and higher. [0003] The exertion of traction force and braking force mainly depends on the adhesion between wheel and rail, and the maximum traction force and braking force that locomotive traction system can exert is also limited by the adhesion between wheel and rail. There are many factors that affect the adhesion coefficient between wheel and rail, and the track environment, wheel diame...

AI Technical Summary

Problems solved by technology

The wheel-rail environment of locomotives is complex and changeable. Under natural conditions, oil pollution on the track, fallen leaves, and the influence of wet, rainy and snowy weather will cause a significant decrease in the adhesion coefficient between the wheel and rail. If the traction torque of the wheel set exceeds the When the maximum wheel traction torque is reached, the wheels may spin / skid, which may lead to derailment in severe cases

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