A rail vehicle anti-skid control method, device and rail vehicle system

A technology of a rail vehicle and a control method, applied in the field of rail vehicles, can solve the problems that the wheels cannot run in the optimal slip rate range, the wheels cannot run all the time, etc., and achieve the effect of avoiding sliding

Active Publication Date: 2022-07-26
CRRC TANGSHAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The anti-skid control of rail vehicles mainly calculates the optimal slip ratio and controls the braking force to make the slip ratio of the wheel rotate near the optimal slip ratio, but the wheel cannot always run at the optimal slip ratio due to the existence of wheel speed fluctuations. In terms of slip rate, especially when the track continues to be in a low-adhesion state, the wheel cannot run in the optimal slip rate range
Existing rail vehicles cannot maximize the adhesion provided by the wheel-rail to achieve effective anti-skid control

Method used

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  • A rail vehicle anti-skid control method, device and rail vehicle system
  • A rail vehicle anti-skid control method, device and rail vehicle system
  • A rail vehicle anti-skid control method, device and rail vehicle system

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Experimental program
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Effect test

Embodiment 1

[0045] Figure 5 A schematic flowchart of the implementation of the anti-skid control method for a rail vehicle in Embodiment 1 of the present application is shown.

[0046] As shown in the figure, the anti-skid control method for a rail vehicle includes:

[0047] Step 501, obtain the vehicle target deceleration a according to the given braking level; And, obtain the current deceleration a' of the controlled shaft according to the shaft speed of the controlled shaft;

[0048] Step 502, obtain the deceleration difference Δa according to the target deceleration a and the current deceleration a';

[0049] Step 503: Generate a braking force change command according to the deceleration difference Δa and the pre-calculated slip ratio S of the controlled shaft.

[0050] During specific implementation, the braking level of the rail vehicle system may include levels 1-7, and the braking level may be determined according to the braking level instruction obtained by the driver or other...

Embodiment 2

[0120] Based on the same inventive concept, the embodiments of the present application provide an anti-skid control device for a rail vehicle. The principle of these devices for solving the technical problem is similar to a method for anti-skid control of a rail vehicle, and the repetition will not be repeated.

[0121] Figure 9 A schematic structural diagram of the anti-skid control device for a rail vehicle in the second embodiment of the present application is shown.

[0122] As shown in the figure, the rail vehicle anti-skid control device includes:

[0123] The target deceleration module 901 is used to obtain the vehicle target deceleration a according to the given braking level;

[0124] a deceleration module 902, configured to obtain the current deceleration a' of the controlled shaft according to the shaft speed of the controlled shaft;

[0125] A deceleration difference value module 903, configured to obtain a deceleration difference value Δa according to the targe...

Embodiment 3

[0155] Based on the same inventive concept, the embodiments of the present application provide a rail vehicle system, which will be described below.

[0156] Figure 10 A schematic structural diagram of the rail vehicle system in the third embodiment of the present application is shown.

[0157] As shown in the figure, the rail vehicle system includes: a train control network system 1001, the rail vehicle anti-skid control device 1002 described in the second embodiment, and a braking system 1003;

[0158] in,

[0159]The train control network system is used to give the braking level;

[0160] The braking system is used for changing the braking force acting on the controlled axle under the control of the rail vehicle anti-skid control device.

[0161] In one embodiment, the braking system includes one or more of the following:

[0162] Air brake system, hydraulic brake system, electric brake system.

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Abstract

A rail vehicle anti-skid control method, device and rail vehicle system, the vehicle target deceleration a is obtained according to a given braking level; the current deceleration a' of the controlled shaft is obtained according to the shaft speed of the controlled shaft; A deceleration difference Δa is obtained from the target deceleration a and the current deceleration a'; a braking force change command is generated according to the deceleration difference Δa and the pre-calculated slip rate S of the controlled shaft. By adopting the solution in this application, the braking force output is controlled by mutual restriction between the slip rate S of the controlled shaft and the difference between the deceleration of the wheel and the target deceleration, which can maximize the use of the adhesion between the wheel and rail to achieve anti-skid control.

Description

technical field [0001] The present application relates to rail vehicle technology, and in particular, to a rail vehicle anti-skid control method, device, and rail vehicle system. Background technique [0002] The high-speed operation of the train must have a reliable braking system, which can enable the train to brake safely and effectively within the specified distance. At present, the main braking method of rail trains still relies on the adhesion of wheel and rail to brake. The biggest disadvantage of adhesive braking is that the adhesive force is limited, and there is a big change with the wheel-rail state, especially when the wheel-rail adhesion force is low such as rain and snow, the friction factor between the wheel and rail is very high. Small, in some cases can not provide enough wheel-rail tangential force. During towing or braking, if the traction or braking torque is too large, the wheels will spin or slide or even lock. For this purpose, the braking force is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60T8/17B60T8/171B60T8/176B60T8/32
CPCB60T8/1705B60T8/171B60T8/176B60T8/3235B60T8/32B60T8/17
Inventor 尹昱淞王铁成徐练李英李玉龙刘大伟路奇刘欣卢波何天祝百年孙明超
Owner CRRC TANGSHAN CO LTD
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