Results 21 to 30 of about 35,860 (209)

Research on Roller Status Diagnosis of CRDM Based on SWT and HHT [PDF]

open access: yesE3S Web of Conferences, 2021
For the control rod drive mechanism roller vibration signal’s characteristics of nonlinear and nonstationary. Based on actual equipment life experiment and roller fault experiment, a status diagnosis method of roller of control rod drive mechanism based ...
Zhang Liming   +4 more
doaj   +1 more source

Hilbert-Huang Transform in Fault Detection

open access: yesProcedia Manufacturing, 2019
Abstract Failures of manufacturing systems represent a significant cost in both repairs and downtime. A considerable percentage of the maintenance cost is caused by unexpected drivetrain failures. This paper proposes a Hilbert-Huang transform (HHT)-based algorithm to effectively detect malfunctioning by revealing the instantaneous amplitude and ...
Zoltan German-Sallo, Horatiu Stefan Grif
openaire   +1 more source

Propagation characteristics of acoustic emission wave in reinforced concrete

open access: yesResults in Physics, 2017
Due to the complexity of components and damage mechanism of reinforced concrete, the wave propagation characteristics in reinforced concrete are always complicated and difficult to determine.
Haoxiong Feng, Weijian Yi
doaj   +1 more source

Application of Hilbert-Huang transform in the analysis of satellite-communication signals

open access: yesRevista Iberoamericana de Automática e Informática Industrial RIAI, 2020
In communication links between satellites and ground stations, the transmitted signal is exposed to disturbances such as noise of different types that hinder reception or retrieval of information.
J. Villanueva   +5 more
doaj   +1 more source

2-D Prony-Huang Transform: A New Tool for 2-D Spectral Analysis [PDF]

open access: yes, 2014
This work proposes an extension of the 1-D Hilbert Huang transform for the analysis of images. The proposed method consists in (i) adaptively decomposing an image into oscillating parts called intrinsic mode functions (IMFs) using a mode decomposition ...
Borgnat, Pierre   +4 more
core   +2 more sources

Aeroelastic Flight Data Analysis with the Hilbert-Huang Algorithm [PDF]

open access: yes
This report investigates the utility of the Hilbert Huang transform for the analysis of aeroelastic flight data. It is well known that the classical Hilbert transform can be used for time-frequency analysis of functions or signals.
Brenner, Martin J., Prazenica, Chad
core   +5 more sources

Comparison between Windowed FFT and Hilbert-Huang Transform for Analyzing Time Series with Poissonian Fluctuations: A Case Study [PDF]

open access: yes, 2006
Hilbert-Huang Transform (HHT) is a novel data analysis technique for nonlinear and non-stationary data. We present a time-frequency analysis of both simulated light curves and an X-ray burst from the X-ray burster 4U 1702-429 with both the HHT and the ...
Dong Han   +5 more
core   +3 more sources

Application of the Hilbert-Huang Transform to the Search for Gravitational Waves [PDF]

open access: yes, 2007
We present the application of a novel method of time-series analysis, the Hilbert-Huang Transform, to the search for gravitational waves. This algorithm is adaptive and does not impose a basis set on the data, and thus the time-frequency decomposition it
Camp, Jordan B.   +2 more
core   +3 more sources

Spectral Analysis of Time Series of Permanent GPS Station Positions Using HHT [PDF]

open access: yesفصلنامه علوم و فناوری فضایی, 2011
In this paper, Hilbert Huang transform (HHT) for time series analysis of the status of permanent GPS stations can be provided. Hilbert Huang transform and its, related spectrun is a new method for the analysis of nonlinear processes.This method ...
F. Nobakht-Orsi   +2 more
doaj  

Drilling-vibration response characteristics of rocks based on Hilbert–Huang transform

open access: yesJournal of Petroleum Exploration and Production Technology, 2023
Currently, there are no in-situ methods to quantify drilling-vibration response characteristics of different lithologies. Here, we quantified the vibration responses of four lithologies (limestone, sandstone, coal, and mudstone) using a combination of ...
Xinxin Fang   +7 more
doaj   +1 more source

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