Results 31 to 40 of about 266,625 (301)
Research on the Rotor Fault Diagnosis Method Based on QPSO-VMD-PCA-SVM
Frontiers in Energy Research, 2022 The rotor system is a core part of rotating machinery equipment. Its safe and reliable operation directly affects the economic benefit of using the equipment and the personal safety of users.
Lu Wang +17 more
doaj +1 more source
Study on EEMD-Based KICA and Its Application in Fault-Feature Extraction of Rotating Machinery
Applied Sciences, 2018 A method is proposed to improve the feature extraction of vibration signals of rotating machinery. Firstly, the single-channel vibration signal is decomposed with ensemble empirical mode decomposition (EEMD).
Liang Fang, Hongchun Sun
doaj +1 more source
Vibration Image Representations for Fault Diagnosis of Rotating Machines: A Review
Machines, 2022 Rotating machine vibration signals typically represent a large collection of responses from various sources in a machine, along with some background noise.
Hosameldin Osman Abdallah Ahmed +1 more
doaj +1 more source
Shock and Vibration, 2015 Induction motors are critical components for most industries and the condition monitoring has become necessary to detect faults. There are several techniques for fault diagnosis of induction motors and analyzing the startup transient vibration signals is
Paulo Antonio Delgado-Arredondo +6 more
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A Feature Extraction Method for Vibration Signal of Bearing Incipient Degradation
Measurement Science Review, 2016 Detection of incipient degradation demands extracting sensitive features accurately when signal-to-noise ratio (SNR) is very poor, which appears in most industrial environments.
Huang Haifeng +5 more
doaj +1 more source
Comprehensive analysis of aero-engine vibration signals based on wavelet transform method
EURASIP Journal on Advances in Signal Processing, 2023 A single type of signal processing means that it is difficult to analyze vibration signals comprehensively and effectively. By comprehensively using wavelet analysis techniques, a comprehensive and in-depth study of aero-engine vibration conditions is ...
Mai Xin +6 more
doaj +1 more source
A New Morphological Filter for Fault Feature Extraction of Vibration Signals
IEEE Access, 2019 Early faults in rolling bearings tend to result in periodic impulse components in the collected vibration signals. However, these fault features are always distorted by noise interferences.
Jianbo Yu, Tianzhong Hu, Haiqiang Liu
doaj +1 more source
Differential phase extraction in an atom gradiometer [PDF]
, 2015 We present here a method for the extraction of the differential phase of an atom gradiometer that exploits the correlation of the vibration signal measured by an auxiliary classical sensor, such as a seismometer or an accelerometer.
Santos, Franck Pereira dos
core +2 more sources
Time after time – circadian clocks through the lens of oscillator theory
FEBS Letters, EarlyView.Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo +2 more
wiley +1 more source
SAR-Based Vibration Estimation Using the Discrete Fractional Fourier Transform [PDF]
, 2012 A vibration estimation method for synthetic aperture radar (SAR) is presented based on a novel application of the discrete fractional Fourier transform (DFRFT).
Atwood, Tom +8 more
core +1 more source