Results 21 to 30 of about 18,994,398 (235)

Research on the Frequency Response and Dynamic Range of the Quadrature Fiber Optic Fabry–Perot Cavity Microphone Based on the Differential Cross Multiplication Demodulation Algorithm

open access: yesSensors, 2021
A quadrature fiber optic Fabry–Perot cavity microphone based on a differential cross multiplication algorithm consists of a pair of fibers and a membrane.
Baokai Ren   +6 more
doaj   +1 more source

An Approximate Transfer Function Model for a Double-Pipe Counter-Flow Heat Exchanger

open access: yesEnergies, 2021
The transfer functions G(s) for different types of heat exchangers obtained from their partial differential equations usually contain some irrational components which reflect quite well their spatio-temporal dynamic properties. However, such a relatively
Krzysztof Bartecki
doaj   +1 more source

Isola in a linear one‐degree‐of‐freedom feedback system with actuator rate saturation

open access: yesInternational Journal of Mechanical System Dynamics, 2023
This short communication uses numerical continuation to highlight the existence of an isola in a simple one‐degree‐of‐freedom harmonically forced feedback system with actuator rate limiting as its only nonlinear element.
Duc H. Nguyen   +2 more
doaj   +1 more source

MULTI-CHANNEL DIGITAL-ANALOG SYSTEM BASED ON CURRENT-CURRENT CONVERTERS

open access: yesInformatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska, 2020
An approach to building a multi-channel digital-analog system is proposed, in which, unlike the known ones, a code-current converter, a controlled current generator, and also a current communication block are used. For a given accuracy, this saves on the
Olexiy Azarov   +2 more
doaj   +1 more source

A Novel Frequency Regulation Strategy for a PV System Based on the Curtailment Power-Current Curve Tracking Algorithm

open access: yesIEEE Access, 2020
The challenges of modern power systems with a high level of renewable generation penetration will impose increased ancillary service on Photovoltaic (PV) systems, including frequency regulation.
Cheng Zhong, Yang Zhou, Gangui Yan
doaj   +1 more source

Influence of the Load on the Impulse Frequency Response Approach Based Diagnosis of Transformer’s Inter-Turn Short-Circuit

open access: yesIEEE Access, 2020
Frequency Response Analysis (FRA) is an Off-line condition monitoring technique for the transformers and is successful, in diagnosing mechanical faults and inter-turn short-circuits.
Natarajan Shanmugam   +2 more
doaj   +1 more source

Vibrations of cracked functionally graded beams: General solution and application – A review

open access: yesVietnam Journal of Mechanics, 2022
This paper presents a unified approach to vibration analysis of functionally graded beams with transverse open-edge cracks based on the so-called vibration shape obtained as a general solution of vibration equations in the frequency domain. The crack is
Nguyen Tien Khiem
doaj   +1 more source

A frequency-response-based method of sound velocity measurement in an impedance tube [PDF]

open access: yes, 2017
A stable and accurate new method for the measurement of the velocity of sound is proposed. The method is based on the characteristics of the frequency response measured at different positions in an impedance tube and it eliminates adverse effects caused ...
Thomas, P. J. (Peter J.)   +2 more
core   +1 more source

Smart frequency control in low inertia energy systems based on frequency response techniques: A review

open access: yes, 2020
Integrated energy systems are considered as an indispensable part of the pathway towards a low-carbon sustainable future, as well as secure and reliable systems, characterised with a high level of flexibility and resilience.
Yi Cheng   +4 more
semanticscholar   +1 more source

Research on the Disc Sensitive Structure of a Micro Optoelectromechanical System (MOEMS) Resonator Gyroscope

open access: yesMicromachines, 2019
A micro optoelectromechanical system (MOEMS) resonator gyroscope based on a waveguide micro-ring resonator was proposed. This sensor was operated by measuring the shift of the transmission spectrum.
Xiang Shen, Liye Zhao, Dunzhu Xia
doaj   +1 more source

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