Design and Implementation of Adaptive Front Light System of Vehicle Using FPGA Based LIN Controller

Abstract

Dangerous traffic accident is easy to happen when vehicles move on curve roads at night. The main reason is conventional front light do not provide sufficient and reasonable illumination for nighttime visibility to be adapted to curves. On that situation, this paper was focused on control model and simulation for Adaptive Front light System (AFS) of vehicles on curve roads. Because vehicles' movement was related to complex dynamics, firstly linear two-degrees-freedom turning model and lateral role model of vehicles were studied. On the basis of these models, this paper put forward control algorithm of adaptive front light on curve roads. From the research, it was concluded that horizontal swing angles of vehicles' front light on curve roads were adjusted according to drivers' visual angle change with velocity change, front wheels' swing angle and side-slip angle, and vertical swing angles of vehicles' front light on curve roads was adjusted according to lateral roll angle of the vehicle' body, and longitudinal irradiation distance of vehicles' front light on curve roads was controlled by safe stopping distance of vehicles. LIN (Local Interconnect Network) based systems may alter the dynamic behavior of vehicle. The vehicle's motion directly influences the lighting direction of AFS (Adaptive Front-lighting System), and the effect of the vehicle dynamics on the swiveling headlamp can be simulate.