To solve the problems of low accuracy and poor evaluation effect of existing anti-skid efficiency calculation methods,based on the in-depth analysis of change rules and characteristics of wheel-rail adhesion coefficient during the train braking anti-skid process,the peak deceleration envelope in the train braking anti-skid process was corrected to make it close to the ideal deceleration curve.Then,a new anti-skid efficiency calculation method was proposed.Combined with the actual working principles of train braking anti-skid systems,a simulation verification platform for the train braking anti-skid efficiency was built.The correctness of the deceleration envelope correction and the accuracy of the new anti-skid efficiency calculation method were verified at the simulation level.The rationalities and the anti-skid performance evaluation effects of six anti-skid efficiency calculation methods were compared and analyzed under different simulation conditions,and the practical applicability of the new method was verified based on the real vehicle anti-skid test.Research results show that the relative errors of braking time and braking distance between the simulation verification platform for train braking anti-skid efficiency and the actual vehicle anti-skid test results are less than 5％under the same condition.Therefore,the platform can be used to verify and analyze the anti-skid efficiency calculation method and the anti-skid performance evaluation effect.The relative error between the corrected peak deceleration envelope and the ideal deceleration curve does not exceed 4.5％.When the anti-skid control strategy remains unchanged,the simulation results of the new anti-skid efficiency calculation method for trains differ by less than 1.1％under different braking levels and adhesion levels.The test results differ by less than 3.5％under the above conditions.The anti-skid efficiencies are all less than 100％.The above results demonstrate good stability of the method.When different anti-skid control strategies are adopted,the simulation results have obvious differences based on the new anti-skid efficiency calculation method,and the corresponding anti-skid efficiencies of different control strategies are positively correlated with their anti-skid performance.The performance differences among different anti-skid systems can be reflected.The new anti-skid efficiency calculation method can calculate the anti-skid efficiency through real vehicle anti-skid tests,providing a new evaluation means of the anti-skid performance for real vehicles.2 tabs,16 figs,30 refs.
railway vehiclebraking systemanti-skid efficiencydeceleration envelopeco-simulationreal vehicle anti-skid test
维普
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