2021
DOI: 10.48550/arxiv.2108.07634
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A rolled-off passivity theorem

Thomas Chaffey

Abstract: Given two nonlinear systems which only violate passivity when their incremental gains are sufficiently small, we give a condition for their negative feedback interconnection to have finite incremental gain, which generalizes the incremental small gain and incremental passivity theorems. The property may be determined graphically by plotting the Scaled Relative Graphs (SRGs) of the systems, which provides engineering significance to the mathematical result.

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“…The SRG of an operator is a region of the extended complex plane, from which the incremental properties of the operator can be easily read. SRGs were recently introduced by Ryu, Hannah, and Yin [74] for the study of monotone operator methods in optimization, and have been used for the study of systems in feedback by the authors in references [75], [76]. The SRG of an operator R ∶ H → H is defined as follows.…”
Section: Memristive Systemsmentioning
confidence: 99%
“…The SRG of an operator is a region of the extended complex plane, from which the incremental properties of the operator can be easily read. SRGs were recently introduced by Ryu, Hannah, and Yin [74] for the study of monotone operator methods in optimization, and have been used for the study of systems in feedback by the authors in references [75], [76]. The SRG of an operator R ∶ H → H is defined as follows.…”
Section: Memristive Systemsmentioning
confidence: 99%