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This paper reports the basic properties and robust control of a vehicle-trailer combination crosswind disturbance conditions. In practice it is known that unstable roll movements may occur, especially with unfavorable combinations of vehicle and trailer conditions, operating slightly above the permissible maximum speed. This may lead to accidents mostly due to improper driver behavior. First we present...
This paper proposes an intuitive nonlinear lateral control strategy for trajectory tracking in autonomous nonholonomic vehicles. The controller has been implemented and verified in Alice, Team Caltech's contribution to the 2007 DARPA Urban Challenge competition for autonomous motorcars. A kinematic model is derived. The control law is described and analyzed. Results from simulations and field tests...
The autonomous car steering problem is defined as a regulation task of yaw and relative lateral position dynamics along a given path trajectory. Therefore a control structure based on vehicle dynamics inversion is proposed to decouple the two regulation tasks. The inversion structure assumes all-wheel (joint front- and rear-axle) steering actuation. The resulting algorithm exhibits additionally integrated...
Autonomous vehicles are under investigation for future automated intelligent vehicle highway systems (IVHS). An important system component is the dynamic controller utilized to follow a desired path delineated by a reference guideline in the road surface. The tracking controller has to be robust with respect to uncertain, and possibly time varying, operating conditions, and external disturbances....
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