Results 41 to 50 of about 233 (207)

Online Active Impedance Estimation Method in an LCL-Grid-Tied VSI: Analysis of the Multisine Perturbation

IEEE Open Journal of Industry Applications
Accurate grid impedance estimation is essential for the stability and efficiency of modern power systems, especially with high renewable energy penetration.
Giovanni Marini, Giulia Di Nezio, Salvatore D'Arco, Alessandro Lidozzi, Marco di Benedetto, Luca Solero   +5 more
doaj   +1 more source

Field Report from Collaborative Research Center 1625: Heterogeneous Research Data Management Using Ontology Representations

Advanced Engineering Materials, EarlyView.
A unified research data management framework for heterogeneous materials data is presented. The system integrates multimodal datasets using ontologies and knowledge graphs, enabling interoperability and FAIR (findable, accessible, interoperable, reusable) data principles. By linking data across scales and workflows, it supports reproducible, Artifitial
Doaa Mohamed, Samuel García Vázquez, Behnam Mardani, Victor Dudarev, Alfred Ludwig, Maribel Acosta, Markus Stricker   +6 more
wiley   +1 more source

Non-Invasive Blood Glucose Estimation System Based on a Neural Network with Dual-Wavelength Photoplethysmography and Bioelectrical Impedance Measuring

Sensors, 2022
This study proposed a noninvasive blood glucose estimation system based on dual-wavelength photoplethysmography (PPG) and bioelectrical impedance measuring technology that can avoid the discomfort created by conventional invasive blood glucose ...
Chih-Ta Yen, Un-Hung Chen, Guo-Chang Wang, Zong-Xian Chen   +3 more
doaj   +1 more source

Phase Field Failure Modeling: Brittle‐Ductile Dual‐Phase Microstructures under Compressive Loading

Advanced Engineering Materials, EarlyView.
The approach by Amor and the approach by Miehe and Zhang for asymmetric damage behavior in the phase field method for fracture are compared regarding their fitness for microcrack‐based failure modeling. The comparison is performed for the case of a dual‐phase microstructure with a brittle and a ductile constituent.
Jakob Huber, Jan Torgersen, Ewald Werner
wiley   +1 more source

Multi-SIN-Based Real-Time Impedance Estimation for Self-Commissioning Controller and Active Damping in an LCL-Grid-Tied VSI

IEEE Open Journal of Industry Applications
This article introduces a novel method for self-commissioning controllers and active damping in LCL grid-tied three-phase voltage source inverters. The proposed impedance estimation method is designed with the goal of minimizing invasiveness on the grid ...
Giovanni Marini, Nicolas Baschera, Alessandro Lidozzi, Marco di Benedetto, Luca Solero   +4 more
doaj   +1 more source

Online detection and estimation of grid impedance variation for Distributed Power Generation [PDF]

2012 16th IEEE Mediterranean Electrotechnical Conference, 2012
A better knowledge of the grid impedance is essential in order to improve power quality and control of the Distributed Power Generation Systems (DPGS) and also for a safe connection or reconnection to the utility grid. An LCL-filterassociated to a Voltage Source Inverter (VSI) is usually used in DPGS based on renewable energy.
Jebali-Ben Ghorbal, Manel, Ghzaiel, Walid, Slama-Belkhodja, Ilhem, Guerrero, Josep M.; id_orcid 0000-0001-5236-4592   +3 more
openaire   +2 more sources

Understanding the Stochastic Nature of Process Parameter Development of Blown Powder Laser Beam Directed Energy Deposition Additive Manufacturing of Pure Molybdenum

Advanced Engineering Materials, EarlyView.
Identified through the use of statistical design of experiments and metallographic investigation, this study exposes the stochastic origins of intergranular cracks in blown powder laser beam directed energy deposition additive manufacturing of pure molybdenum. It further demonstrates a successful crack mitigation approach with direct correlation to the
Nathaniel J. Lies, Daniel E. Driemeyer, Aaron P. Stebner   +2 more
wiley   +1 more source

Black-Box Impedance Prediction of Grid-Tied VSCs Under Variable Operating Conditions

IEEE Access, 2022
Impedance/admittance models (IM/AMs) have been widely used to analyze the small-signal stability of grid-tied power electronic devices, such as the voltage source converter (VSC).
Qi Qiu, Yifan Huang, Rui Ma, Jurgen Kurths, Meng Zhan   +4 more
doaj   +1 more source

Is an Apple an Orange? A Large Language Model Benchmark for Candidate Term Extraction and Subclass Decisions Against Upper Ontologies in Engineering and Materials Science

Advanced Engineering Materials, EarlyView.
Building machine‐readable vocabularies for materials science is slow, expert‐driven work. This study benchmarks 13 large language models on two of its first steps: finding candidate terms in engineering articles and deciding where they belong in a class hierarchy.
Thomas Bjarsch, Maximilian Holland, Klaus Drechsler, Johannes Schilp   +3 more
wiley   +1 more source

DC-Link Capacitor Diagnosis in a Single-Phase Grid-Connected PV System

Energies, 2021
The DC-link capacitor is one of the components that are more prone to faults in energy-distributed systems based on voltage source inverters. A predictive maintenance approach should allow to foresee the risk of an unexpected system shutdown.
Ramiro Alejandro Plazas-Rosas, Martha Lucia Orozco-Gutierrez, Giovanni Spagnuolo, Édinson Franco-Mejía, Giovanni Petrone   +4 more
doaj   +1 more source