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arXiv 0705.3868math.OC
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离散控制系统

Discrete Control Systems

Taeyoung Lee, Melvin Leok, N. Harris McClamroch

摘要:

离散控制系统,如这里所考虑的,是指离散时间拉格朗日或哈密顿系统的控制理论。这些离散时间模型基于离散变分原理,并且是几何积分的更广泛领域的一部分。几何积分器是保持连续系统的几何性质的数值积分方法,例如辛形式、动量和能量的守恒。它们还保证离散流保持在连续系统演化的流形上,这是刚体动力学的一个重要性质。在非线性控制中,人们通常依赖于微分几何和动力系统技术来证明稳定性、可控性和最优性等性质。更一般地说,这种系统的几何结构在相应的控制问题的非线性分析中起着至关重要的作用。尽管几何和力学在非线性控制系统的分析中起着关键作用,但非线性控制算法通常使用忽略基本几何的数值方案来实现。离散控制系统领域旨在通过将近似限制于离散时间模型的选择并开发不引入任何附加近似的相关控制理论来解决该缺陷。特别是,这涉及到一个控制理论的离散时间模型的基础上几何积分,产生数值实现的非线性和几何控制算法,保持关键的基本几何结构的建设。

英文摘要:

Discrete control systems, as considered here, refer to the control theory of discrete-time Lagrangian or Hamiltonian systems. These discrete-time models are based on a discrete variational principle, and are part of the broader field of geometric integration. Geometric integrators are numerical integration methods that preserve geometric properties of continuous systems, such as conservation of the symplectic form, momentum, and energy. They also guarantee that the discrete flow remains on the manifold on which the continuous system evolves, an important property in the case of rigid-body dynamics. In nonlinear control, one typically relies on differential geometric and dynamical systems techniques to prove properties such as stability, controllability, and optimality. More generally, the geometric structure of such systems plays a critical role in the nonlinear analysis of the corresponding control problems. Despite the critical role of geometry and mechanics in the analysis of nonlinear control systems, nonlinear control algorithms have typically been implemented using numerical schemes that ignore the underlying geometry. The field of discrete control system aims to address this deficiency by restricting the approximation to choice of a discrete-time model, and developing an associated control theory that does not introduce any additional approximation. In particular, this involves the construction of a control theory for discrete-time models based on geometric integrators that yields numerical implementations of nonlinear and geometric control algorithms that preserve the crucial underlying geometric structure.

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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