Results 11 to 20 of about 147,643 (299)

Machine Learning Based Method for Impedance Estimation and Unbalance Supply Voltage Detection in Induction Motors [PDF]

open access: yesSensors, 2023
Induction motors (IMs) are widely used in industrial applications due to their advantages over other motor types. However, the efficiency and lifespan of IMs can be significantly impacted by operating conditions, especially Unbalanced Supply Voltages ...
Khaled Laadjal   +3 more
doaj   +2 more sources

Review of Local Network Impedance Estimation Techniques [PDF]

open access: yesIEEE Access, 2020
As a result of increasing variability of network impedance, interest in impedance estimation techniques is growing. This review contextualises local impedance estimation techniques by providing a historical prospective on the uses of these techniques ...
Mathieu Kervyn De Meerendre   +5 more
doaj   +5 more sources

Dynamic Impedance Estimation: Challenges and Considerations [PDF]

open access: yesApplied Sciences, 2021
The objective of this paper was to examine the dynamic impedance estimation of electrical systems from online measurements. The paper makes several considerations and highlights the challenges to obtain a precise estimation.
Mateus M. de Oliveira   +6 more
doaj   +2 more sources

Constrained robust estimation of magnetotelluric impedance functions based on a bounded-influence regression M-estimator and the Hilbert transform [PDF]

open access: yesNonlinear Processes in Geophysics, 2008
Robust impedance estimation procedures are now in standard use in magnetotelluric (MT) measurements and research. These always yield impedance estimates which are better than the conventional least square (LS) estimation because the 'real' MT ...
D. Sutarno
doaj   +3 more sources

Power Distribution System Characterization With Active Probing: Real-World Testing and Analysis

open access: yesIEEE Open Access Journal of Power and Energy, 2023
Power distribution systems are traditionally characterized using passive means such as parameter estimation and topology identification. This work investigates an active way to test and characterize dynamically changing distribution systems.
Can Huang   +3 more
doaj   +1 more source

Novel Method for Estimating Utility Harmonic Impedance for a Direct-Drive Permanent Magnet Synchronous Generator Wind Farm

open access: yesIEEE Access, 2022
Accurate estimation of the utility harmonic impedance is significant for harmonic control and responsibility division. Traditional methods of estimating the utility harmonic impedance are valid on the premise that the harmonic impedance on the wind-farm ...
Runze Zhou   +4 more
doaj   +1 more source

A novel fault monitoring method based on impedance estimation of power line communication equipment

open access: yesFrontiers in Energy Research, 2023
Due to the close relationship between power grid fault and impedance, there is a significant defect in the use of power line communication (PLC) equipment to monitor and locate power grid faults, which is the lack of real-time impedance information ...
Dong Liang   +4 more
doaj   +1 more source

Virtual Stiffness: A Novel Biomechanical Approach to Estimate Limb Stiffness of a Multi-Muscle and Multi-Joint System

open access: yesSensors, 2023
In recent years, different groups have developed algorithms to control the stiffness of a robotic device through the electromyographic activity collected from a human operator.
Daniele Borzelli   +3 more
doaj   +1 more source

An Effective Acoustic Impedance Imaging Based on a Broadband Gaussian Beam Migration

open access: yesEnergies, 2021
The estimation of the subsurface acoustic impedance (AI) model is an important step of seismic data processing for oil and gas exploration. The full waveform inversion (FWI) is a powerful way to invert the subsurface parameters with surface acquired ...
Shaoyong Liu   +4 more
doaj   +1 more source

Estimates of Acausal Joint Impedance Models [PDF]

open access: yesIEEE Transactions on Biomedical Engineering, 2012
Estimates of joint or limb impedance are commonly used in the study of how the nervous system controls posture and movement, and how that control is altered by injury to the neural or musculoskeletal systems. Impedance characterizes the dynamic relationship between an imposed perturbation of joint position and the torques generated in response.
David T, Westwick, Eric J, Perreault
openaire   +2 more sources

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