%0 Book Section
%A Jorge, Tiago
%A Lemos, Joao M.
%A Barão, Miguel
%A Bemporad, Alberto
%B Proceedings of the 18th IFAC World Congress, 2011
%D 2011
%F eprints:741
%I IFAC
%K Nonlinear and optimal automotive control; Intelligent driver aids
%P 5082-5087
%T Hybrid dynamic optimization for cruise speeed control
%U http://eprints.imtlucca.it/741/
%V 18
%X The cruise control problem of transferring the speed of a vehicle between two values in a fixed interval of time using a predefined sequence of gears is solved in this paper. This is a hybrid dynamic optimization problem since the control variables include both a continuous variable (fuel flow) and a discrete variable (the gear to apply at each instant). The solution is given in the form of a hybrid optimal control algorithm that computes the optimal switching times between gears using Dynamic Programming and the optimal fuel profile between successive gear boundaries using a gradient algorithm to approximate the optimum conditions. In order to reduce the search of the optimal switching times to a search in a finite dimension graph, a procedure based on a changing grid is used. The algorithm is illustrated by a simulation using a diesel one-dimensional car model.
%Z This work has been performed within the framework of activity 2.4.1 – Smart drive control of project SE2A - Nanoelectronics for Safe, Fuel Efficient and Environment Friendly Automotive Solutions, ENIAC initiative.