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A method of train anti-slip control based on optimal slip ratio and its control device

A slip rate, optimal technology, applied in brakes, pneumatic brakes, transportation and packaging, etc., can solve problems such as the change of the optimal slip rate of the adhesion coefficient between the train wheels and rails

Active Publication Date: 2020-06-05
CENT SOUTH UNIV
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  • Description
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AI Technical Summary

Problems solved by technology

[0004] The traditional slip rate control method is to give a fixed slip rate, but when the wheel-rail contact conditions change with the weather, environment and other factors, the adhesion coefficient between the train wheel and rail and the corresponding optimal slip rate will also change

Method used

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  • A method of train anti-slip control based on optimal slip ratio and its control device
  • A method of train anti-slip control based on optimal slip ratio and its control device
  • A method of train anti-slip control based on optimal slip ratio and its control device

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Embodiment Construction

[0073] The present invention will be further described below in conjunction with examples.

[0074] like figure 1 As shown, the train anti-skid control device provided by the present invention includes an electronic brake control unit (EBCU), an air source system, an anti-skid valve, a pressure sensor, a speed sensor and a brake cylinder, wherein the anti-skid valve is connected with the air source system, the brake cylinder The air source system and the atmosphere are connected to the brake cylinder through the anti-skid valve, and the electronic brake unit is connected to the brake cylinder through the anti-skid valve. It exhausts or refills the brake cylinder by controlling the anti-skid valve switch to Adjust the brake cylinder pressure until the solved braking torque is reached. The pressure sensor collects the pressure in the brake cylinder in real time, and the speed sensor collects the wheel set speed in real time. Both the pressure sensor and the speed sensor are con...

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Abstract

The invention discloses a train anti-skid control method based on an optimal slip rate and a control device thereof. The method comprises the following steps: firstly, according to a braking cylinderpressure, calculating a locomotive braking force; secondly, according to a non-linear relationship between an adhesion coefficient and a slip rate, calculating the optimal slip rate through an extremevalue search algorithm; and according to a difference value of an actual slip rate and the optimal slip rate, through running a PID control algorithm, solving to obtain a braking force moment by an anti-skid valve control panel; based on the braking force moment, controlling an anti-skid valve switch to exhaust air or re-charge air to the braking cylinder, adjusting the pressure of the braking cylinder until the braking force moment is solved. The anti-skid control method is capable of realizing the optimal slip rate as a control objective, through adjusting parameters of a controller, enabling a wheel slip rate to be near the optimal slip rate, and guaranteeing that a train has the good anti-skid control effect while driven in different rail environments.

Description

technical field [0001] The invention belongs to the technical field of vehicle braking, and in particular relates to a train anti-slip control method and a control device based on an optimal slip ratio. Background technique [0002] The rapid development of high-speed railway plays an increasingly important role in promoting the economy and people's daily life. With the increase of locomotive speed and load, the train anti-skid brake control system plays an important role in ensuring the safe operation of the train. The locomotive mainly relies on adhesion braking when braking. However, once the wheel-rail contact condition changes suddenly or the adhesion between the wheel and rail decreases, the braking force of the locomotive will exceed the adhesion force, causing the wheelset to slip on the rail. High-speed sliding on rails can cause tread scuffing. Therefore, it is very important to adjust the braking force according to the change of the adhesion between the wheel an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60T8/17B60T8/172B60T8/174B60T8/1755B61H11/06
Inventor 彭军徐小康张晓勇陈彬张瑞黄志武蒋富杨迎泽刘伟荣李恒
Owner CENT SOUTH UNIV
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