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Hybrid dynamic optimization for cruise speeed control

Jorge, Tiago and Lemos, Joao M. and Barão, Miguel and Bemporad, Alberto Hybrid dynamic optimization for cruise speeed control. In: Proceedings of the 18th IFAC World Congress, 2011. IFAC, pp. 5082-5087. ISBN 978-3-902661-93-7 (2011)

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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.

Item Type: Book Section
Identification Number: 10.3182/20110828-6-IT-1002.01146
Additional Information: 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.
Uncontrolled Keywords: Nonlinear and optimal automotive control; Intelligent driver aids
Subjects: T Technology > TJ Mechanical engineering and machinery
T Technology > TL Motor vehicles. Aeronautics. Astronautics
Research Area: Computer Science and Applications
Depositing User: Professor Alberto Bemporad
Date Deposited: 29 Jul 2011 10:53
Last Modified: 09 Jul 2012 09:32
URI: http://eprints.imtlucca.it/id/eprint/741

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