The shunted loudspeaker with a negative impedance converter is physical system multiple influencing parameters. In this paper, fully exhaustive backtracking algorithm was used to optimize these parameters, such as moving mass, total stiffness, damping, coil inductance, force factor, circuit resistance, inductance and capacitance, in order obtain the best sound absorption specific frequency rang...

This paper proposes an adaptive grid impedance shaping approach, implemented through a variable structure virtual control strategy (VS-VIS), to improve the power flow of grid-forming converters (GF-PC). In this strategy, equivalent estimator (EGIE) evaluates feeder X/R ratio determine required reach objective. Besides, definition also considers converter rating ensure system’s feasibilit...

Despite its advantages over AC counterparts, DC microgrids present a lot of challenges. One these challenges is the instability issues caused by constant power loads (CPLs). CPLs deteriorate system’s performance due to their incremental negative impedance characteristics. In this paper, microgrid composed PV/battery system feeding pure CPL was considered. A continuous-time model predictive cont...

In recent years, DC microgrid systems feeding constant power loads (CPLs) have been given a particular focus due to their effect on the overall system stability caused by electrical characteristics behaving as negative incremental impedance. To address this issue, paper investigates stabilization of bus voltage in (MG) CPL. The output main is stabilized using robust nonsingular terminal sliding...

The circulating current is one of the important issues for parallel converters. It affects system stable operation and degrades power quality. In order to reduce converter harmonic pollution grid, a new suppression strategy proposed source without any communication line. This able realize sharing between modules by changing external characteristics thus suppress among control adopts DC-side dro...

Impedance-based stability analysis is an effective method for addressing a new type of SSO accidents that have occurred in recent years, especially those caused by the control interaction between DFIG and power grid. However, existing impedance modeling DFIGs mostly focused on single converter, such as GSC or RSC, influence RSC GSC, well frequency coupling effect inside converter are usually ov...

An analog standard cell layout configuration is proposed for simplifying the design and reducing the man-hours for designing mixed analog-digital LSIs, and analog standard cells are fabricated for A-D and D-A converters with ∆-Σ modulators. This works seeks to implement 2-D cell placement with up-down and left-right mirror rotation and shorter high-impedance analog wiring than conventional 1-D ...

A DC–DC switching converter chip is proposed to generate both positive and negative voltages for active-matrix LCD (AMLCD) bias. An inductive boost converter and two inverting charge pumps are integrated in a proposed chip by using a 0.5 mm 5 V, 3.5 mm 30 V CMOS process. A conventional scheme used to bias AMLCD employs a switching-boost converter with several off-chip components to generate the...

In mammals, hearing is dependent on three canonical processing stages: (i) an eardrum collecting sound, (ii) a middle ear impedance converter, and (iii) a cochlear frequency analyzer. Here, we show that some insects, such as rainforest katydids, possess equivalent biophysical mechanisms for auditory processing. Although katydid ears are among the smallest in all organisms, these ears perform th...