This paper focuses on the problem of path following in autonomous vehicles. A solution to this problem is a strategy during which a feedback/feed-forward control law is considered to control the path of the vehicle. In this controller, feedback and feed-forward gains are calculated based on the vehicle dynamic and road-concerned variables. A linear quadratic regulator (LQR) technique is applied to a three-degree of-freedom (DOF) linear vehicle model and three types of controllers are designed with the use of active front steering (AFS), four-wheel steering (4WS) and combination of an AFS with a direct yaw moment control (DYC) systems. A comparison is made about the performance and the efficacy among the different controllers in two different maneuvers. An 8-DOF nonlinear vehicle model is used for simulation purposes. It is concluded that 4WS system shows better potential for path following control of an autonomous vehicle.
Integrated Controller Design for Path Following in Autonomous Vehicles
Sae Technical Papers
SAE 2011 World Congress & Exhibition ; 2011
2011-04-12
Conference paper
English
Integrated controller design for path following in autonomous vehicles
Automotive engineering | 2011
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