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arXiv math/0703911math.OC
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广义Goddard问题中的奇异弧

Singular arcs in the generalized Goddard's Problem

Frédéric Bonnans, Pierre Martinon, Emmanuel Trélat

摘要:

我们调查戈达德的问题的非垂直轨迹的变种。控制是推力,目标是最大化某个最终成本,通常是最终质量。在这份报告中,进行分析的基础上庞特里亚金最大值原理,我们证明,最佳轨迹可能涉及奇异弧(沿其规范的推力既不是零,也不是最大的),计算和特点。进行了数值模拟,直接和间接的方法,证明考虑奇异弧的控制策略的相关性。我们使用的间接方法是基于我们以前的理论分析,并包括在结合打靶法同伦方法。同伦方法导致问题的二次正则化,并且是处理最优控制的非光滑性问题的一种方法。

英文摘要:

We investigate variants of Goddard's problems for nonvertical trajectories. The control is the thrust force, and the objective is to maximize a certain final cost, typically, the final mass. In this report, performing an analysis based on the Pontryagin Maximum Principle, we prove that optimal trajectories may involve singular arcs (along which the norm of the thrust is neither zero nor maximal), that are computed and characterized. Numerical simulations are carried out, both with direct and indirect methods, demonstrating the relevance of taking into account singular arcs in the control strategy. The indirect method we use is based on our previous theoretical analysis and consists in combining a shooting method with an homotopic method. The homotopic approach leads to a quadratic regularization of the problem and is a way to tackle with the problem of nonsmoothness of the optimal control.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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