Results 1 to 10 of about 1,223,079 (165)
An Effective Method for Improving Low-Frequency Response of Geophone
Sensors, 2023 The natural frequency of traditional velocity sensors such as moving coil geophones limits their measurable low-frequency range, and the damping ratio affects the flatness of the sensor in the amplitude and frequency curves, resulting in variations in ...
Kai Ma +5 more
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Effect of measurement method on an earmuff’s frequency response
Archives of Acoustics, 2014 Light, medium and heavy earmuffs’ amplitude frequency response was measured using transmission loss technique with a microphone placed in subject’s ear (MIRE – microphone in real ear) and on an artificial test fixture (ATF). Measurements were conducted
Rafał Młyński, Jan Żera
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Research on Online Detection Method of Transformer Winding Deformation Based on VFTO Characteristics
Energies, 2023 At present, most of the winding fault detections of transformers use offline methods, which require the entire line to be powered off or after the transformer has been shut down due to a serious fault, and they cannot detect the running status of the ...
Xinghua Shi, Ran Wei, Wenbin Zhang
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Research on On-Line Detection Method of Transformer Winding Deformation Based on VFTO
Sensors, 2021 At present, the detection of transformer winding deformation faults is carried out in an offline state, which requires the transformer to cooperate with the implementation of planned power outages, or it takes place after the sudden failure of the ...
Yanyun Wang +7 more
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Methodologies for modeling and identification of breathing crack: A review
MethodsX, 2023 Swift development of technology for monitoring complex structures demands major attention on the precision of damage detection methods. The early detection of any type of deterioration or degradation of structures is of paramount importance to avoid ...
Sayandip Ganguly
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Mathematics, 2021 This is the first on a series of articles that deal with nonlinear dynamical systems under oscillatory input that may exhibit harmonic and non-harmonic frequencies and possibly complex behavior in the form of chaos.
Elena Hernandez +3 more
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Mathematics, 2022 This work is the second in a series of articles that deal with analytical solutions of nonlinear dynamical systems under oscillatory input that may exhibit harmonic frequencies.
Elena Hernandez +3 more
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An extended modeling of frequency security constraints for unit commitment model
Energy Reports, 2023 Under the background of high proportion of renewable energy, the frequency security of the power system is facing challenges, which makes it necessary to consider and respond in the optimal dispatching. In this paper, the frequency security constraint is
Yao Wang +5 more
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A novel frequency response measurement method for wideband ADCs' system
Electronics Letters, 2021 The parallel analogue to digital converter (ADC) structure with mixers such as digital bandwidth‐interleaving ADC (DBI‐ADC) is a practical structure for realising the wideband data acquisition system.
Yi Zhou +3 more
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A novel criterion for crack detection in beam structures by frequency response functions
Vietnam Journal of Mechanics, 2023 The frequency response function (FRF) is a fruitful attribute that includes almost all dynamical characteristics of a structure such as natural frequencies and modes, damping coefficients, or resonance and antiresonance conceptions. However, the complex
Nguyen Tien Khiem +4 more
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