Lane Keeping System (LKS), one of the systems in Advanced Driving Assist System(ADAS), is now commonly applied as an active lateral motion control for vehicles. The Electric Power Steering (EPS) system and Lane Detection (LD) module are integrated for LKS operation. LKS functions when the vehicle travels to an unintentional lane departure depending on the Time-to-Lane-Crossing (TTLC). On the other hand, LKS may be capable of keeping the vehicle travel in the lane, but it may cause driving discomfort as well. The feedback torque to the steering system is thus necessary to be redefined to decrease the steering torque impulse. In this paper, an active steering control system determines the assistive steering torque by overlapping the torque delivered from the driver command and the LKS. The system will correct the trajectory back to the lane with the
overlapping torque, providing interactive steering torque feedback. Two experiments are adopted in this paper to verify the effectiveness of interactive torque feedback under active steering torque control type and original angle control type LKS. The result shows that the active steering control type LKS helps the driver easily adjust the trajectory with less driver torque than the original angle control. Also, it provides smoother lateral vehicle motion which meets the ISO11270 standard and brings better driving experience.
Keywords － Lane Keeping System; Active Steering Control
- IA-07-0018 (511K)