Antiskid control method for rail vehicle braking system

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...

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