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Second order optimality conditions in the smooth case and applications in optimal control

Published online by Cambridge University Press:  12 May 2007

Bernard Bonnard ,
Jean-Baptiste Caillau  and
Emmanuel Trélat
Bernard Bonnard
Affiliation:
Univ. Dijon, IMB, Bât. Mirande, 9 avenue Alain Savary, 21078 Dijon Cedex, France; [email protected]
Jean-Baptiste Caillau
Affiliation:
ENSEEIHT-IRIT, UMR CNRS 5505, 2 rue Camichel, 31071 Toulouse, France; [email protected]
Emmanuel Trélat
Affiliation:
Univ. Orléans, UFR Sciences Mathématiques, Labo. MAPMO, UMR 6628, Route de Chartres, BP 6759, 45067 Orléans Cedex 2, France; [email protected]
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Abstract

The aim of this article is to present algorithms to compute the firstconjugate time along a smooth extremal curve, where the trajectoryceases to be optimal. It is based on recent theoretical developmentsof geometric optimal control, and the article contains a reviewof second order optimality conditions.The computations are related to a testof positivity of the intrinsic second order derivative or a test ofsingularity of the extremal flow. We derive an algorithm called COTCOT(Conditions of Order Two and COnjugate Times), available on the web,and apply it to the minimal time problem of orbit transfer, and to theattitude control problem of a rigid spacecraft.This algorithm involves both normal and abnormal cases.

Keywords

Conjugate pointsecond-order intrinsic derivativeLagrangian singularityJacobi fieldorbit transferattitude control
Type
Research Article
Information
ESAIM: Control, Optimisation and Calculus of Variations , Volume 13 , Issue 2 , April 2007 , pp. 207 - 236
Copyright
© EDP Sciences, SMAI, 2007

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