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Lagrangian and Port-Hamiltonian formulation for Distributed-parameter systems

机译:分布参数系统的拉格朗日和汉密尔顿港公式

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In this paper we consider distributed-parameter systems that allow for a Lagrangian or port-Hamiltonian formulation. We will distinguish the case where the Lagrangian or the Hamiltonian depend on derivative variables (jet-variables) of first-order and the case where second-order derivatives appear. This distinction will be important for the correct determination of the boundary conditions in the Lagrangian scenario and for the investigation of possible boundary ports in the Hamiltonian picture. The derivation of the partial differential equations and the boundary terms/ports will be accomplished in a geometric fashion by using the so-called Cartan-form. We visualize our results by mechanical examples such as beams and plates.
机译:在本文中,我们考虑允许使用拉格朗日或哈密尔顿公式的分布式参数系统。我们将区分拉格朗日或哈密顿依赖于一阶导数变量(喷射变量)的情况和出现二阶导数的情况。这种区别对于正确确定拉格朗日情景中的边界条件以及调查汉密尔顿图中可能的边界端口非常重要。偏微分方程和边界项/端口的推导将通过使用所谓的Cartan形式以几何方式完成。我们通过机械示例(例如梁和板)可视化我们的结果。

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