This paper presents a current controller that shapes, in the frequency domain, the input admittance of VSC converters connected to the grid. The controller is obtained by means of a H∞ synthesis procedure, which minimizes the difference between the application closed-loop input admittance and a modelreference defined by the designer. This formulation achieves good accuracy in both modulus and p...

A novel systematic approach for synthesizing DDCC-based voltage-mode biquadratic universal filters is proposed. The DDCCs are described by infinity-variables’ models of nullor-mirror elements which can be used in the nodal admittance matrix expansion process. Applying the proposed method, the obtained 12 equivalent filters offer the following features: multi-input and two outputs, realization o...

OBJECTIVE Accurate ear-canal acoustic measurements, such as wideband acoustic admittance, absorbance, and otoacoustic emissions, require that the measurement probe be tightly sealed in the ear canal. Air leaks can compromise the validity of the measurements, interfere with calibrations, and increase variability. There are no established procedures for determining the presence of air leaks or cr...

Most of the recent studies on unfamiliar negative group delay (NGD) circuit were focused classes low-pass (LP) and bandpass (BP) topologies. So far, few research works are currently available in literature high-pass (HP) NGD class. This paper introduces an original HP-NGD theory four-port passive topology constituted by a single lumped capacitor. The S-matrix equivalent model innovative is esta...

A detailed analysis of the assembly influence on the small-signal parameters of a packaged transistor is presented. A new method, based on 3D field simulation and mixed-mode scattering parameters approach is proposed. Differences in scattering parameters caused by assembly change are computed using the new proposed method and compared to the standard method based on admittance matrix. The diffe...

Abstract Whenrobots physically interact with the environment, compliant behaviors should be imposed to prevent damages all entities involved in interaction. Moreover, during physical interactions, appropriate pose controllers are usually based on robot dynamics, which ill-conditioning of joint-space inertia matrix may lead poor performance or even instability. When control is not precise, large...

Harmonic resonance may cause abnormal operation and even damage of power facilities, further threatening normal and safe operation of power systems. For renewable energy generations, controlled loads and parallel reactive power compensating equipment, their operating statuses can vary frequently. Therefore, the parameters of equivalent fundamental and harmonic admittance/impedance of these comp...

BACKGROUND In a deforming anatomic environment, the motion of an instrument suffers from complex geometrical and dynamic constraints, robot assisted minimally invasive surgery therefore requires more sophisticated skills for surgeons. This paper proposes a novel dynamic virtual fixture (DVF) to enhance the surgical operation accuracy of admittance-type medical robotics in the deforming environm...

Most techniques for power system analysis model the grid by exact electrical circuits. For instance, in power flow study, state estimation, and voltage stability assessment, the use of admittance parameters (i.e., the nodal admittance matrix) and hybrid parameters is common. Moreover, network reduction techniques (e.g., Kron reduction) are often applied to decrease the size of large grid models...