A model based on hierarchical safety distance algorithm for ACC control mode switching strategy

Intelligent vehicle has the trend for multiple ADAS system combined with each other, the traditional ACC generally with cruise control mode, accelerate control mode, stable follow control mode, decelerate control mode, emergency brake collision avoidance control mode, no combination of FCW and AEB function. This paper proposes a ACC system combined with FCW and AEB function, this system based on electric vehicle. Firstly, the system through safety distance model and dangerous condition judgment model to calculate the coefficient of safety level, then combining vehicle sensing information through control mode switching strategy to choose cruise control mode, accelerate control mode, stable follow control mode, decelerate control mode, emergency brake collision avoidance control mode. So as to realize acceleration, cruise, early warning and braking functions smooth switching.