Abstract
In this paper, we consider the minimum time problem for a space rocket whose dynamics is given by a control-affine system with drift. The admissible control set is a disc. We study extremals in the neighbourhood of singular points of the second order. Our approach is based on applying the method of a descending system of Poisson brackets and the Zelikin – Borisov method for resolution of singularities to the Hamiltonian system of Pontryagin’s maximum principle. We show that in the neighbourhood of any singular point there is a family of spiral-like solutions of the Hamiltonian system that enter the singular point in a finite time, while the control performs an infinite number of rotations around the circle.
Notes
The parameter \(c\) can be chosen arbitrarily close to \(1\).
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ACKNOWLEDGMENTS
The authors thank Prof. M. I. Zelikin and Prof. L. V. Lokutsievskiy for useful discussions. We are also grateful to the anonymous reviewers for useful comments that helped to improve the text.
Funding
This work is supported by the Russian Science Foundation (grant No. 20-11-20169).
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MSC2010
49J15, 49N60, 34H05
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Ronzhina, M.I., Manita, L.A. Spiral-Like Extremals near a Singular Surface in a Rocket Control Problem. Regul. Chaot. Dyn. 28, 148–161 (2023). https://doi.org/10.1134/S1560354723020028
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DOI: https://doi.org/10.1134/S1560354723020028