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arXiv 2103.13971eess.SYcs.SYmath.OC
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用于系统分析的标度相对图

Scaled relative graphs for system analysis

Thomas Chaffey, Fulvio Forni, Rodolphe Sepulchre

摘要:

最近引入了缩放相对图来分析二维欧氏几何优化算法的收敛性。在本文中,我们连接到经典理论的输入/输出系统的缩放相对图。证明了LTI系统在$L_2$上的Nyquist图是其缩放相对图在特定坐标变换下的凸包。SRG可用于可视化静态非线性的近似,如描述函数和二次约束,允许验证或证伪系统属性。系统的互连对应于其SRG的图形操作。这是用来提供一个简单的,图形证明经典的增量无源性定理。

英文摘要:

Scaled relative graphs were recently introduced to analyze the convergence of optimization algorithms using two dimensional Euclidean geometry. In this paper, we connect scaled relative graphs to the classical theory of input/output systems. It is shown that the Nyquist diagram of an LTI system on $L_2$ is the convex hull of its scaled relative graph under a particular change of coordinates. The SRG may be used to visualize approximations of static nonlinearities such as the describing function and quadratic constraints, allowing system properties to be verified or disproved. Interconnections of systems correspond to graphical manipulations of their SRGs. This is used to provide a simple, graphical proof of the classical incremental passivity theorem.

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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