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To stability lane keeping for intelligent four wheel steering vehicle, a cascade control strategy is proposed which integrate the direct yaw moment control and the lane keeping control. The main controller achieves the front wheel angle control for lane keeping. The deputy controller achieves the yaw stability control. The front wheel angle of the main controller is as input of the deputy controller, and the desired slip angle and desired yaw rate are obtained. The rear wheel angle and yaw moment are as inputs of deputy controller, and compensation of the rear wheel steering angle and yaw moment is calculated based on the LQ algorithm. The actual vehicle slip angle and actual yaw rate can track desired slip angle and yaw rate. After controlling of stability control, the main control can achieve lane keeping accurately, to ensure the intelligent vehicle driving in the inside lane driving safely. The experimental results show that, the cascade control strategy is effective, and it can improve the accuracy of lane tracking for intelligent vehicle, but also can improve stability and maneuverability. Copyright © 2016 by Science Press.
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