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Pré-Publication, Document De Travail Année : 2019

Tangency property and prior-saturation points in minimal time problems in the plane

Résumé

In this paper, we consider minimal time problems governed by control-affine-systems in the plane, and we focus on the synthesis problem in presence of a singular locus that involves a saturation point for the singular control. After giving sufficient conditions on the data ensuring occurence of a prior-saturation point and a switching curve, we show that the bridge, the optimal bang arc issued from the singular locus at this point) is tangent to the switching curve at the prior-saturation point. This property is proved using the Pontryagin Maximum Principle that also provides a set of non-linear equations that can be used to compute the prior-saturation point. These issues are illustrated on a fed-batch model in bioprocesses and on a Magnetic Resonance Imaging (MRI) model for which minimal time syntheses for the point-to-point problem are discussed.
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Dates et versions

hal-02280065 , version 1 (05-09-2019)
hal-02280065 , version 2 (16-09-2019)
hal-02280065 , version 3 (13-07-2020)

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  • HAL Id : hal-02280065 , version 1

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Térence Bayen, Olivier Cots. Tangency property and prior-saturation points in minimal time problems in the plane. 2019. ⟨hal-02280065v1⟩
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