Multirate active steering control for autonomous vehicle lateral maneuvering

A multirate steering control scheme is developed for autonomous vehicle lateral maneuvering. The proposed scheme consists of a multirate extended Kalman filter and a state feedback control. The multirate extended Kalman filter is to estimate the vehicle states at a fast rate of the car ECU using multirate sensing - a slow vision-based lane detection by a camera and fast motion detection by inertia sensors. A method to design the multirate decentralized extended Kalman filter is presented. Through application results, the proposed multirate steering control scheme is shown to exhibit significantly improved control performance.