Braking Force Distribution Strategy of an Innovative Friction and Permanent Magnet Combined Braking System

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Kuiyang Wang
Yuyong Wang
Chuanyun Zhu
Guo Chen
Jinhua Tang

Abstract

An innovative friction and permanent magnet combined braking system is the research object of this article and its distribution strategy of braking force was studied. Firstly, three typical distribution strategy curves of braking force were defined, based on the working mechanism of the friction and permanent magnet combined braking system, between the front and rear axles of vehicle. Considering the constraints of ECE regulations, the distribution strategy between the front and rear axles was formulated for the combined braking system, and the distribution strategy within a combined brake was formulated. Secondly, the co-simulation model of whole vehicle with the combined braking system was constructed based on Carsim and Simulink, and a quantitative evaluation index, which is the proportion coefficient of permanent magnet braking, was proposed. Taking continuous braking, low intensity braking and moderate intensity braking as examples, the proposed braking force distribution strategies were simulated and verified. Finally, the test bench was built for the combined braking system, and taking the target braking strength of 0.3 as an example, the performance on anti-heat decay of the combined brake was verified through bench test. The test result shows that the distribution strategies proposed for the combined braking system can fully leverage the advantages of non-contact permanent magnet braking, and the anti-heat decay performance of combined brake is improved.

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