Results 11 to 20 of about 813 (142)

Hilbert-Twin – A Novel Hilbert Transform-Based Method To Compute Envelope Of Free Decaying Oscillations Embedded In Noise, And The Logarithmic Decrement In High-Resolution Mechanical Spectroscopy HRMS

Archives of Metallurgy and Materials, 2015
In this work, we present a novel Hilbert-twin method to compute an envelope and the logarithmic decrement, δ, from exponentially damped time-invariant harmonic strain signals embedded in noise.
Magalas L.B., Majewski M.
doaj   +1 more source

Application of VMD and Hilbert Transform Algorithms on Detection of the Ripple Components of the DC Signal

Energies, 2020
Accurate detection of ripple components of the direct-current (DC) signals is essential for evaluating DC power quality. In this study, the combination algorithm based on variational mode decomposition (VMD) and Hilbert transform (HT) is applied to ...
Derong Luo, Ting Wu, Ming Li, Benshun Yi, Haibo Zuo   +4 more
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Identification of modal parameters of long-span bridges under various wind velocities

Advances in Bridge Engineering, 2022
The modal parameters identification of bridges under non-stationary environmental excitation has caught the attention of researchers. This paper studies the non-stationarity of wind velocity, and extracts the time-varying mean wind velocity based on a ...
Siying Lu, Lei Yan, Xuhui He, Hui Guo
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Health Assessment and Fault Detection System for an Industrial Robot Using the Rotary Encoder Signal

Energies, 2019
In an industrial robot, rotary encoders have been extensively used for dynamic control and positioning. This study shows that the encoder signal, after appropriate processing, can also be efficiently utilized for the health observation of energy ...
Riyadh Nazar Ali Algburi, Hongli Gao
doaj   +1 more source

Time-Frequency Analysis and Application of a Vibration Signal of Tunnel Excavation Blasting Based on CEEMD-MPE-HT

Shock and Vibration, 2021
The traditional empirical mode decomposition method cannot accurately extract the time-frequency characteristic parameters contained in the noisy seismic monitoring signals.
Chen-yang Ma, Li Wu, Miao Sun, Qing Yuan
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Effectiveness Analysis of PMSM Motor Rolling Bearing Fault Detectors Based on Vibration Analysis and Shallow Neural Networks

Energies, 2021
Permanent magnet synchronous motors (PMSMs) are becoming more popular, both in industrial applications and in electric and hybrid vehicle drives. Unfortunately, like the others, these are not reliable drives. As in the drive systems with induction motors,
Pawel Ewert, Teresa Orlowska-Kowalska, Kamila Jankowska   +2 more
doaj   +1 more source

Spectral Analysis of Electricity Demand Using Hilbert–Huang Transform

Sensors, 2020
The large amount of sensors in modern electrical networks poses a serious challenge in the data processing side. For many years, spectral analysis has been one of the most used approaches to extract physically meaningful information from a sea of data ...
Joaquin Luque, Davide Anguita, Francisco Pérez, Robert Denda   +3 more
doaj   +1 more source

A combined HT and ANN based early broken bar fault diagnosis approach for IFOC fed induction motor drive

Alexandria Engineering Journal, 2023
In recent years, fault diagnosis in the Induction Motor Drive (IMD) has been a popular and important field in the motor-drive research area. The development of control circuits for induction motors has prompted the attention of both researchers and ...
R. Senthil Kumar, I. Gerald Christopher Raj, Ibrahim Alhamrouni, S. Saravanan, Natarajan Prabaharan, S. Ishwarya, Mustafa Gokdag, Mohamed Salem   +7 more
doaj   +1 more source

Determination of Instantaneous Frequencies of Low Plasma Waves in the Magnetosheath Using Empirical Mode Decomposition (EMD) and Hilbert Transform (HT)

Atmospheric and Climate Sciences, 2013
The observations of in-situ spacecraft mission in the magnetosheath and a region of thermalized subsonic plasma behind the bow shock reveal a non-linear behaviour of plasma waves. The study of waves and optics in Physics has given the understanding of the effect of many waves coming together to form a wave field or wave packet.
Ekong Ufot Nathaniel, Nyakno Jimmy George, Sunday Edet Etuk   +2 more
openaire   +2 more sources

Extended Hilbert Transform and Application for Seismic Attributes

Earth and Space Science, 2019
The Hilbert transform (HT) has been widely used in seismic data processing and interpretation. However, HT results exhibit lower noise robustness and resolution.
Gulan Zhang, Yong Li, Tingyi Wang, Hao Du, Fan Luo, Yizong Zhan   +5 more
doaj   +1 more source