Abstract
Abstract In this paper, hardware in the loop simulation(HILS) for a hybrid electric vehicle(HEV) braking performance is performed to investigate the vehicle stability control algorithm in the varying road surface condition. The vehicle stability control algorithm consists of the optimal braking torque distribution between the regenerative braking and the electro hydraulic braking. In addition to the optimal braking torque distribution, a sliding mode type wheel slip control algorithm is proposed to maintain the target slip ratio. The HILS system is composed of 4 wheel calipers and the electro hydraulic brake(EHB) module, and dynamic model of the HEV powertrain constructed by MATLAB Simulink is used as a software part. It is found from the HILS results that vehicle stability control algorithm using the regenerative braking, EHB and slip ratio control is able to provide the improved braking performance such as shorter braking distance, smaller error of the sideslip angle and yaw rate.
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