Antiskid control method for rail vehicle braking system

A technology for braking systems and rail vehicles, applied in the field of anti-skid control of rail vehicle braking systems, can solve problems such as quantitative calculation or perception of non-stick conditions, and achieve the effects of online parameter identification, skid prevention, and shortened braking distances

Active Publication Date: 2019-12-03
TONGJI UNIV
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Problems solved by technology

The implementation scheme described in this document is based on the existing criteria for optimal control, and cannot make quantitative calculations or perceptions of the current sticking situation

Method used

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  • Antiskid control method for rail vehicle braking system
  • Antiskid control method for rail vehicle braking system
  • Antiskid control method for rail vehicle braking system

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Embodiment Construction

[0047] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0048] A method for anti-skid control of a rail vehicle braking system, such as figure 1 shown, including:

[0049] Step S1: Obtain the estimated value of the adhesion coefficient through online estimation of the adhesion based on the negative gradient iterative method, including:

[0050] Step S11: Obtain the braking force K and wheel pair angular velocity ω applied by the braking system at the current moment in real time;

[0051] Step S12: Obtain the estimated value of the adhesion force between the wheel and rail, and continuously update the estimated value of the adhesion force...

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Abstract

The invention relates to an anti-skid control method for the braking system of a rail vehicle, which comprises the following steps: step S1, on-line estimating adhesion coefficient based on negative gradient iteration method to obtain an estimated value of adhesion coefficient; 2, accord to that estimated value of the adhesion coefficient, identify the optimal slip rate based on the least square parameter identification method to obtain a slip rate characteristic curve; Step S3, obtaining the slope of the current slip rate characteristic curve according to the obtained slip rate characteristiccurve, and determining the current control strategy according to the differential of the slip rate. Compared with the prior art, the invention can effectively prevent the wheelset from coasting in the braking process of the train, improve the adhesion utilization rate and shorten the braking distance.

Description

technical field [0001] The invention relates to an anti-skid control method, in particular to an anti-skid control method for a rail vehicle braking system. Background technique [0002] For sticking braking, the sliding of the vehicle is mainly caused by the braking force exceeding the sticking force, so the anti-skid control can be realized by controlling the braking force, that is to say, the braking deceleration can be controlled according to the sticking force to avoid coasting , so the anti-skid control is mainly to control the braking force, improve and make full use of sticking. At present, the braking system of rail vehicles uses many criteria when judging sliding, mainly based on speed difference, deceleration, creep rate, deceleration differential, etc. Among them, speed difference and deceleration are more common. The anti-skid control system sets the threshold value to control the change of braking force according to the change of speed difference and decelerat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60T8/172
CPCB60T8/172
Inventor 吴萌岭田春朱文良马天和袁泽旺蒋亮
Owner TONGJI UNIV
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