Safe and efficient operation active adhesion controlling method and system for motor train unit

Abstract

The invention relates to a safe and efficient operation active adhesion controlling method for a motor train unit. The method comprises the following steps: S1, designing an adhesion torque observer for estimating an adhesion torque il between train wheels and a rail in real time according to a single-axis dynamical model and the full-dimensional state observer principle; S2, deriving an adaptive limiting torque Tlim of a traction motor according to the adhesion torque il, a body acceleration value a and a variable step length algorithm; and S3, designing an adhesion controller according to the daptive limiting torque Tlim of the traction motor and a motor output torque index value Tm* given by a superior traction control system, to coordinate traction control and adhesion control. The method effectively improves the traction braking efficiency of a train, reduces wheel-rail wear, strengthens safe and stable operation of the train, prolongs the service lives of wheels and rails, improves the comfort of passengers and reduces energy consumption of the train.

Description

technical field [0001] The present invention relates to the field of railway and rail transit, and more specifically relates to an active adhesion control method and system for safe and efficient operation of multiple trains. Background technique [0002] Adhesion generated by the wheel-rail interaction is a key component of the rail vehicle powertrain, providing the actual traction or braking force for the rail vehicle. However, the adhesion between wheel and rail is a complex process with great uncertainty, which is affected by many factors such as locomotive design, wheel and rail conditions, vehicle speed, track conditions, and climate conditions. With the increasing speed and range of EMU trains, the operating environment of trains has become more complex and changeable. In order to ensure the safe and effective operation of trains under such high-speed and long-distance conditions, it puts forward higher requirements and challenges for the adhesion control performance...

AI Technical Summary

Problems solved by technology

However, these methods are all post-compensation control methods when dealing with the slipping problem caused by "low adhesion", and they need to measure the accurate vehicle body speed and obtain the adhesion characteristics of the wheel-rail surface to ensure the effectiveness of the control

However, in the current practical application, it is difficult to obtain the accurate vehicle body speed and the adhesion characteristics of the wheel-rail surface.

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