With the increasing penetration of converter-interfaced generation, it would be advantageous to specify local grid-connectivity criteria ensure small-signal stability interconnected system, rather than carrying out centralized studies every time connection a new device is contemplated. Passivity admittance, which an example criterion, has been used previously avoid resonances between systems an...

Passivity theory has recently contributed to developing decentralized control schemes for large-scale systems. Many passivity-based are designed in continuous-time. It is well-known, however, that the passivity properties of continuous-time systems may be lost under discretization. In this letter, we present a novel stabilizing scheme by ensuring discrete-time directly and thus avoiding issue p...

Motivated by developments on differential Lyapunov functions for contraction analysis in Forni, Sepulchre (2012) we propose a definition of differential passivity, based on the geometric framework of the prolongation of a nonlinear system in Crouch, van der Schaft (1987). We explore the ramifications of this definition and its potential uses.

This paper presents some analyses about the robust practical stability of a class of nonlinear affine systems in the presence of non-vanishing perturbations based on the passivity concept. The given analyses confirm the robust passivity property of the perturbed nonlinear systems in a certain region. Moreover, robust control laws are designed to guarantee the practical stability of the perturbe...

Passivity is a fundamental property of many physical systems which may be roughly defined in terms of energy dissipation and transformation. It is an inherent Input-Output property in the sense that it quantifies and qualifies the energy balance of a system when stimulated by external inputs to generate some output. Passivity is therefore related to the property of stability in an input-output ...

In this letter, we consider nonlinear network systems under unknown disturbances and address the problem of mixed input/output consensus , i.e., consensus among disjoint sets input output nodes. We develop two control schemes based on different notions passivity: 1) Krasovskii passivity 2) shif...

For a class of square continuous-time nonlinear controllers we design a suitable resetting rule inspired by the resetting rule for Clegg integrators and First Order Reset Elements (FORE).With this rule,we prove that the arising hybrid system with temporal regularization is passive in the conventional continuous-time sensewith a small shortage of input passivity decreasingwith the temporal regul...

Force controlled series elastic actuators (SEA’s) are widely used components of novel physical human-robot interaction applications such as assistive and rehabilitation robotics. These systems are characterized by the presence of the “human in the loop” so that control response and stability depend on uncertain human dynamics. A common approach to guarantee stability is to use a passivity-based...

A new control scheme for induction motors is proposed in the present paper, applying the interconnection and damping assignment-passivity based control (IDA-PBC) method. The scheme is based exclusively on passivity based control, without restricting the input frequency as it is done in field oriented control (FOC). A port-controlled Hamiltonian (PCH) model of the induction motor is deduced to m...