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A Geometric Method for Passivation and Cooperative Control of Equilibrium-Independent Passivity-Short Systems
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Equilibrium-independent passive-short (EIPS) systems are a class of systems that satisfy a passivity-like dissipation inequality with respect to any forced equilibria with non-positive passivity indices. This paper presents a geometric approach for finding a passivizing transformation for such systems, relying on their steady-state input-output relation and the notion of projective quadratic inequalities (PQIs). We show that PQIs arise naturally from passivity-shortage characteristics of an EIPS system, and the set of their solutions can be explicitly expressed. We leverage this connection to build an input-output mapping that transforms the steady-state input-output relation to a monotone relation, and show that the same mapping passivizes the EIPS system. We show that the proposed transformation can be implemented through a combination of feedback, feed-through, post- and pre-multiplication gains. Furthermore, we consider an application of the presented passivation scheme for the analysis of networks comprised of EIPS systems. Numerous examples are provided to illustrate the theoretical findings.
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Cited by 1 Pith paper
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Monitoring Link Faults in Nonlinear Diffusively-coupled Networks
A passivity-based fault detection and isolation framework for nonlinear diffusively-coupled multi-agent networks, with graph-theoretic guarantees on the number of simultaneously isolable link faults.
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