A Nested PID Steering Control for Lane Keeping in Vision Based Autonomous Vehicles

被引:41
|
作者
Marino, Riccardo [1 ]
Scalzi, Stefano [1 ]
Orlando, Giuseppe [1 ]
Netto, Mariana [2 ]
机构
[1] Univ Roma Tor Vergata, Dept Elect Engn, Via Politecn 1, I-00133 Rome, Italy
[2] INRETS, LCPC, LIVIC Vehicle Infrasture Driver Interact Res Unit, F-78000 Versailles, France
来源
2009 AMERICAN CONTROL CONFERENCE, VOLS 1-9 | 2009年
关键词
STABILITY; SYSTEMS;
D O I
10.1109/ACC.2009.5160343
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
In this paper a nested PID steering control for lane keeping in vision based autonomous vehicles is designed to perform path following in the case of roads with an uncertain curvature. The control input is the steering wheel angle: it is designed on the basis of the yaw rate, measured by a gyroscope, and the lateral offset, measured by the vision system as the distance between the road centerline and a virtual point at a fixed distance from the vehicle. No lateral acceleration and no lateral speed measurements are required. A PI active front steering control on the yaw rate tracking error is used to reject constant disturbances and the overall effect of parameter variations while improving vehicle steering dynamics. The yaw rate reference is viewed as the control input in an external control loop: it is designed using a PID control on the lateral offset to reject the disturbances on the curvature which increase linearly with respect to time. The robustness is investigated with respect to speed variations and uncertain vehicle physical parameters: it is shown that the controlled system is asymptotically stable for all perturbations in the range of interest. Several simulations are carried out on a standard big sedan CarSim vehicle model to explore the robustness with respect to unmodelled effects such as combined lateral and longitudinal tire forces, pitch and roll. The simulations show reduced lateral offset and new stable mu-split braking manoeuvres in comparison with the CarSim model predictive steering controller implemented by CarSim.
引用
收藏
页码:2885 / +
页数:2
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