Skid control of small electric vehicle with hybrid brake system

Abstract

The studies of safety and stability systems of small electric vehicles can be divided broadly into two areas of interest, namely skid control by motor sensors and safety improvement by Anti-lock Braking System (ABS). However, most of the small electric vehicles only provide seat belts and mechanical brake system as safety equipment. For a small electric vehicle, there is no space to install a brake unit of ABS system in driving tire because an in-wheel motor system was used as a driving unit. In this report, we introduce the simulation model of hybrid brake system with an ABS as a braking system for a small electric vehicle. The simulation of an ABS which combines with the hybrid brake system can control the value of slip ratio under stable region. In this simulation, the effect of a regenerative brake on a turning motion to the vehicle suspension was investigated. From this simulation, when a regenerative brake was operation, the combination of hybrid brake system with an ABS can control the movement of the roll center to the stable region and finally it can improve the safety and stability systems of the small electric vehicle.