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Method and device for cLosed-Loop controL of raiL vehicLe braking deceLeration

A braking deceleration and closed-loop control technology, which is applied in the field of rail vehicle braking systems, can solve problems such as inability to calculate or perceive, lack of adaptability and accuracy, etc., to reduce uncontrollable excessive, avoid train sliding, improve The effect of stop accuracy

Active Publication Date: 2018-11-23
NANJING CRRC PUZHEN HAITAI BRAKE EQUIP CO LTD
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Problems solved by technology

In the two implementations proposed in this patent application, the target cylinder pressure correction value is realized through table look-up and fuzzy reasoning, respectively, and the adaptability and accuracy are insufficient, and it is impossible to quantify the interference factors such as brake shoes / plates and ramps. calculation or perception

Method used

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  • Method and device for cLosed-Loop controL of raiL vehicLe braking deceLeration

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Embodiment Construction

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0039] The core of the rail vehicle braking deceleration closed-loop control method of the present invention lies in the acquisition of the total disturbance estimated value, and the principle is as follows:

[0040] First, a simplified train kinematics equation is established as shown in Equation 1:

[0041]

[0042] Among them, v is the speed of the train, M is the mass of the train, g is the acceleration of gravity, b 0 is the basic resistance, θ is the slope of the ramp (positive for uphill, negative for downhill), and B is the total braking force (including friction coefficient f).

[0043] make in, For the control system to calculate the ...

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Abstract

The invention reLates to a method and device for cLosed-Loop controL of a raiL vehicLe braking deceLeration. During the braking and deceLerating process of the vehicLe, the totaL disturbance estimation vaLue is updated in reaL time, and then a target braking force is caLcuLated according to the totaL disturbance estimation vaLue so as to achieve cLosed-Loop controL of the train braking deceLeration. By using the method, the target vaLue foLLowing feature of the deceLeration actuaL vaLue during the braking process of the train can be improved, when the disturbances, such as a ramp, the Loading,the friction coefficient of the brake shoe (sheet), or eLectricaL braking force and the Like, exist, the deviation between the actuaL braking deceLeration and target braking deceLeration of the trainis controLLed to a Lower LeveL.

Description

technical field [0001] The invention belongs to the technical field of rail vehicle braking systems, and in particular relates to a braking control device and a control method for closed-loop control of rail vehicle braking deceleration. Background technique [0002] The current rail vehicle brake control system is open-loop at the level of train deceleration, the control system only controls the brake cylinder pressure in a closed-loop, and the process from brake cylinder pressure to deceleration is uncontrolled. [0003] During the braking process of the rail vehicle, the friction coefficient of the brake shoe / plate is changed by the relative motion speed, temperature, pressure and other time-varying parameters of the friction pair, so that the actual braking force of the train is larger or smaller, so that the actual deceleration of the train is reduced. There is an error with the target value. [0004] During the braking process of rail vehicles, if they run on ramps, c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L7/26
CPCB60L7/26B60L2200/26
Inventor 杨俊田春刘寅虎鲁进军罗飞平幸甚蔡亮亮
Owner NANJING CRRC PUZHEN HAITAI BRAKE EQUIP CO LTD
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