Results 61 to 70 of about 294,653 (299)

A Numerical–Experimental Approach for Multi‐Matrix Fiber‐Reinforced Plastics Characterization Using Finite Element Model Updating

Advanced Engineering Materials, EarlyView.
A numerical–experimental framework is developed for characterizing multi‐matrix fiber‐reinforced polymers (MM‐FRPs) combining epoxy and polyurethane matrices. Harmonic bending tests are integrated with finite element model updating (FEMU) to simultaneously identify elastic and viscoelastic material parameters.
Rodrigo M. Dartora, Tales V. Lisbôa, Axel Spickenheuer, Rogério J. Marczak, Jakson M. Vassoler   +4 more
wiley   +1 more source

Higher-Order Dynamic Mode Decomposition to Identify Harmonics in Power Systems

Energies
The proliferation of renewable energy sources and distributed generation systems interfaced to the grid by power electronics systems is forcing us to better understand the issues arising due to the quality of electrical signals generated through these ...
Aboubacar Abdou Dango, Innocent Kamwa, Himanshu Grover, Alexia N’Dori, Alireza Masoom   +4 more
doaj   +1 more source

A Fast Time-Domain Current Harmonic Extraction Algorithm for Power Quality Improvement Using Three-Phase Active Power Filter

IEEE Access, 2020
Harmonic current estimation is the key aspect of Active Power Filter (APF) control algorithms to generate a reference current for harmonic compensation.
Muhammad Kashif, M. J. Hossain, Edstan Fernandez, Seyedfoad Taghizadeh, Vivek Sharma, S. M. Nawazish Ali, Usama Bin Irshad   +6 more
doaj   +1 more source

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

Advanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal, Michael M. Becker, Sarah C. L. Fischer   +2 more
wiley   +1 more source

Power Quality Enhancement Using Power Balance Theory Based DSTATCOM

Advances in Electrical and Electronic Engineering, 2016
The DSTATCOM (Distributed Static Compensator) is used for current harmonic mitigation, Power Factor Correction (PFC), reactive power compensation, load balancing and neutral current compensation in the Power Distribution System (PDS).
Jampana Bangarraju, Veeramalla Rajagopal, Askani Jaya Laxmi   +2 more
doaj   +1 more source

Computational science and re-discovery: open-source implementations of ellipsoidal harmonics for problems in potential theory

, 2012
We present two open-source (BSD) implementations of ellipsoidal harmonic expansions for solving problems of potential theory using separation of variables.
Ambia-Garrido J, Ammari H, Bowman J J, Byerly W E, Dassios G, Heine E, Hobson E W, Hobson E W, Jansen G, Jaydeep P Bardhan, Kang H, Knepley M G Bardhan J P, Matthew G Knepley, Morse P M, Ritter S   +14 more
core   +1 more source

Surface Tension Measurement of Ti‐6Al‐4V by Falling Droplet Method in Oxygen‐Free Atmosphere

Advanced Engineering Materials, EarlyView.
In this article, the temperature‐dependent surface tension of free falling, oscillating Ti‐6Al‐4V droplets is investigated in both argon and monosilane doped, oxygen‐free atmosphere. Droplet temperature and oscillation are captured with one single high‐speed camera, and the surface tension is calculated with Rayleigh's formula.
Johannes May, Finn‐Lennard Janthur, Lena Kreie, Michael Müller, Sarah Seffer, Nick Schwarz, Jörg Hermsdorf, Thomas Hassel, Stefan Kaierle, Ludger Overmeyer   +9 more
wiley   +1 more source

An electro-thermal modeling of distribution transformer for hottest spot evaluation under photovoltaic-induced harmonics

International Journal of Renewable Energy Development
Elevated winding insulation temperature, driven by harmonic distortions, is a key factor in transformer lifespan reduction. Conventional models often oversimplify the effect of combined current and voltage harmonics.
Muhammad Haziq Mohd Wazir, Dalila Mat Said, Norazliani Md Sapari, Mohamed Shahriman Mohamed Yunus, Zaris Izzati Mohd Yassin   +4 more
doaj   +1 more source

Sensorless AC Capacitor Voltage Monitoring Method for HAPF

IEEE Access, 2023
This study presents a method for monitoring the voltage across the AC capacitor in a grid-connected hybrid active power filter without the use of additional voltage sensors. In the case of an AC capacitor used in a hybrid, active power filter, there is a
Hyunjae Lee, Jingeun Shon
doaj   +1 more source

Appearance of Negative Differential Conductivity in Graphene Nanoribbons at High-Harmonics

, 2012
We theoretically study current dynamics of graphene nanoribbons subject to bias dc and ac driven fields. We showed that graphene nanoribbons exhibit negative high-harmonic differential conductivity.
Abukari, S. S., Mensah, S. Y., Rabiu, M.
core   +1 more source