A New Demodulation Method for Mechanical Fault Feature Extraction based on LOD and IEE
Measurement Science Review, 2021 The rolling bearing and gear fault features are generally shown as modulation characteristics of their vibration signals. The empirical envelope (EE) method is an accordingly common demodulation method. However, the EE method has the defects of over- and
Zhang Kang +5 more
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Optimal demodulation of PAM signals [PDF]
IEEE Transactions on Information Theory, 1973 Kalman filtering theory is applied to yield an optimal causal demodulator for pulse-amplitude-modulated (PAM) signals in the presence of white Gaussian noise. The discrete-time data (or sampled continuous-time data) are assumed to be either a stationary or non-stationary Gaussian stochastic process, in general nonwhite.
John B. Moore, Priti Hetrakul
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Novel adaptation of the demodulation technology for gear damage detection to variable amplitudes of mesh harmonics [PDF]
, 2011 In this paper, a novel adaptive demodulation technique including a new diagnostic feature is proposed for gear diagnosis in conditions of variable amplitudes of the mesh harmonics.
L. Gelman +3 more
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EXPERIMENTAL COMPARISON OF HOMODYNE DEMODULATION ALGORITHMS FOR PHASE FIBER-OPTIC SENSOR [PDF]
Научно-технический вестник информационных технологий, механики и оптики, 2015 Subject of Research. The paper presents the results of experimental comparative analysis of homodyne demodulation algorithms based on differential cross multiplying method and on arctangent method under the same conditions. The dependencies of parameters
M. N. Belikin +4 more
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An automated methodology for performing time synchronous averaging of a gearbox signal without speed sensor [PDF]
, 2007 In this paper we extend a sensorless algorithm proposed by Bonnardot et al. for angular resampling of the acceleration signal of a gearbox submitted to limited speed fluctuation.
Gelman, Leonid, Combet, Francois
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A Filtering Algorithm of MEMS Gyroscope to Resist Acoustic Interference
Sensors, 2020 To reduce the impact of acoustic interference in a microelectromechanical system (MEMS) gyroscope and to improve the reliability of output data, a filtering algorithm based on orthogonal demodulation is proposed.
Yufei Sun +4 more
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Resonance-Based Nonlinear Demodulation Analysis Method of Rolling Bearing Fault
Advances in Mechanical Engineering, 2013 Numerous mechanical nonstationary fault signals are a mixture of sustained oscillations and nonoscillatory transients, which are difficult to efficiently analyze using linear methods. We propose a nonlinear demodulation analysis method based on resonance
Lingli Cui +3 more
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Measurement + Control, 2023 For the sake of deriving the signature frequencies of the composite malfunctions of broken and worn teeth of gearbox, the essay raised a method on account of local mean decomposition and Hilbert demodulation to diagnose gearbox composite fault. The local
Jingyue Wang +4 more
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FPGA-Based Hardware Implementation of Homodyne Demodulation for Optical Fiber Sensors
Photonics, 2023 Homodyne demodulation is a convenient technique for signal detection in interferometric sensors. The demodulation process is typically developed using analog circuits.
Abimael Jiménez +4 more
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Amplitude and Phase Analysis of EEG Signal by Complex Demodulation [PDF]
, 2013 Analysis of amplitude and phase characteristics for delta, theta, and alpha bands at localized time instant from EEG signals is important for the characterizing information processing in the brain.
강희철, 유선국
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