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arXiv 2501.12940math-phcs.NAmath.DSmath.MPmath.NA
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欧拉-庞加莱约减与含输运参数和附加动力学的离散机械系统的凯尔文-诺特定理

Euler--Poincaré reduction and the Kelvin--Noether theorem for discrete mechanical systems with advected parameters and additional dynamics

Keio University(庆应义塾大学);Marche Polytechnic University(马尔凯理工大学)

Yusuke Ono, Simone Fiori, Linyu Peng

AI总结:

本文提出离散欧拉-庞加莱约减方法,用于具有输运参数和附加动力学的离散拉格朗日系统,通过群差分映射技术扩展了连续和离散的凯尔文-诺特定理,并应用于水下机器人动力学的数值模拟。

摘要:

欧拉-庞加莱方程最初由亨利·庞加莱于1901年提出,源于将拉格朗日力学应用于具有对称性的李群上的系统,特别是在经典力学和流体动力学的背景下。这些方程已被扩展到各种设定,如半直接积、输运参数和场论,并被广泛应用于力学和物理学。本文提出了一种离散欧拉-庞加莱约减方法,用于具有输运参数和附加动力学的离散拉格朗日系统,利用群差分映射技术。具体来说,群差分映射通过凯利变换或矩阵指数定义。相应地扩展了连续和离散的凯尔文-诺特定理,这些理论考虑了连续和离散欧拉-庞加莱方程的凯尔文-诺特量。作为应用,我们展示了连续和离散欧拉-庞加莱关于水下机器人动力学的公式,随后进行数值模拟。数值结果展示了该方案在长时间内保持几何性质的能力,突显了其在水下机器人控制和导航以及其他领域中的潜在应用价值。

英文摘要:

The Euler--Poincaré equations, firstly introduced by Henri Poincaré in 1901, arise from the application of Lagrangian mechanics to systems on Lie groups that exhibit symmetries, particularly in the contexts of classical mechanics and fluid dynamics. These equations have been extended to various settings, such as semidirect products, advected parameters, and field theory, and have been widely applied to mechanics and physics. In this paper, we introduce the discrete Euler--Poincaré reduction for discrete Lagrangian systems on Lie groups with advected parameters and additional dynamics, utilizing the group difference map technique. Specifically, the group difference map is defined using either the Cayley transform or the matrix exponential. The continuous and discrete Kelvin--Noether theorems are extended accordingly, that account for Kelvin--Noether quantities of the corresponding continuous and discrete Euler--Poincaré equations. As an application, we show both continuous and discrete Euler--Poincaré formulations about the dynamics of underwater vehicles, followed by numerical simulations. Numerical results illustrate the scheme's ability to preserve geometric properties over extended time intervals, highlighting its potential for practical applications in the control and navigation of underwater vehicles, as well as in other domains.

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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