Our previous work in an animal model showed that neuromuscular damping properties help maintain limb posture by effectively dissipating mechanical energy arising from disturbances. The purpose of this study was to determine whether similar damping properties were expressed in intact, normal human muscles. To review briefly, when the reflexively active soleus muscle in a decerebrate cat is coupl...

The present two-part paper concerns the active vibration suppression for simplest damped continuous system, namely transverse oscillations of an elastic string, with constant tension and mass density per unit length friction force proportional to velocity, described by telegraph or wave-diffusion equation, in two complementary parts. initial part I considers non-resonant resonant forcing, conce...

Flexible DC transmission systems experience negative damping characteristics in the high-frequency range due to delay system control link. This can lead interactions between impedance of modular multilevel converters (MMCs) and AC lines, resulting oscillation (HFO) issues. To resolve this problem, a simplified MMC model was developed, taking into account current inner loop The Sobol method empl...

Unified power flow controller (UPFC), as one of the most important FACTS devices, can be used to increase the damping of power system oscillation. The effect rate of this controller on increasing oscillation damping depends on the appropriate selection of input controlling signal, optimal selection of UPFC controlling parameters, and its proper position in power system. In this paper, the capab...

In grid-forming control, the swing equation of a synchronous machine is emulated by power controller. Thereby, frequency droop, power-oscillation damping, and/or virtual inertia can be obtained. this letter, it shown that phase-locked loop—which normally grid following—can designed so as to, in turn, emulate generic controller, thus, becoming grid-forming.

We consider the problem of oscillation damping in air of a thermally actuated microlever as it gradually approaches an infinite wall in parallel geometry. As the gap is decreased from 20 microm down to 400 nm, we observe the increasing damping of the lever Brownian motion in the fluid laminar regime. This manifests itself as a linear decrease in the lever quality factor accompanied by a dramati...