（1.Department of Automobile Engineering, Guangxi Vocational &Technical College of Communication,Nanning 530216, China; 2.Guangxi Key Laboratory of Automobile Component and  Vehicle Technology, Guangxi University of Science and Technology, Liuzhou 545006, China）


Abstract: Aiming at the problem that the selection scheme to the electromagnetichydraulic braking system (EHYS) is difficult to judge by a single method, an EHYS scheme evaluation method based on rank correlation analysis fuzzy comprehensive evaluation method was proposed. The rank correlation analysis was applied to determine the index weights of the key indicators, which included braking torque, electromagnetic brake service life, cost performance and installation difficulty. The key index evaluation table was established, the evaluation matrix of each scheme were obtained, the weight of the key indicators and the evaluation matrix of each scheme were fuzzy calculated, the fuzzy comprehensive evaluation model of each scheme were calculated, the evaluation results of each scheme were finally obtained. The results indicate that the best EHYS election scheme can be obtained when the current intensity to the electromagnetic brake coil is 25 A, the air gap between the iron core and the braking disc is 1 mm, the number of coil turns are 810, and the brake disc material is steel material.
Key words: electromagnetichydraulic braking system (EHYS); rank correlation analysis; fuzzy comprehensive evaluation method; scheme judging