Demodulation for hydraulic pump fault signals based on local mean decomposition and improved adaptive multiscale morphology analysis

Jiang, Wanlu; Zheng, Zhi; Zhu, Yan; Li, Yang

doi:10.1016/j.ymssp.2014.10.017

Cited by 84 publications

(39 citation statements)

References 27 publications

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“…Several approaches have been reported to extract the envelope signal. In this paper, the widely used Hilbert transform based envelope extraction method is adopted [1]. For the signal ( ), its Hilbert transform is defined aŝ…”

Section: Envelope Analysismentioning

confidence: 99%

“…The pump performance directly relates to the reliability of the whole hydraulic cycle, so the condition monitoring and fault diagnosis on the pump is very important [1]. In the pump, the bearing supports the main shaft, and it is one of the easiest infection components.…”

Section: Introductionmentioning

confidence: 99%

“…In the pump, the bearing supports the main shaft, and it is one of the easiest infection components. The spectrum analysis on the bearing vibration signal, and further deducing the fault type, is a main fault diagnosis approach for the bearing of plunger pump [1,2].…”

Section: Introductionmentioning

confidence: 99%

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Optimum IMFs Selection Based Envelope Analysis of Bearing Fault Diagnosis in Plunger Pump

Wang

Gong

et al. 2016

Shock and Vibration

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As the plunger pump always works in a complicated environment and the hydraulic cycle has an intrinsic fluid-structure interaction character, the fault information is submerged in the noise and the disturbance impact signals. For the fault diagnosis of the bearings in plunger pump, an optimum intrinsic mode functions (IMFs) selection based envelope analysis was proposed. Firstly, the WignerVille distribution was calculated for the acquired vibration signals, and the resonance frequency brought on by fault was obtained. Secondly, the empirical mode decomposition (EMD) was employed for the vibration signal, and the optimum IMFs and the filter bandwidth were selected according to the Wigner-Ville distribution. Finally, the envelope analysis was utilized for the selected IMFs filtered by the band pass filter, and the fault type was recognized by compared with the bearing character frequencies. For the two modes, inner race fault and compound fault in the inner race and roller of rolling element bearing in plunger pump, the experiments show that a promising result is achieved.

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Section: Envelope Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Optimum IMFs Selection Based Envelope Analysis of Bearing Fault Diagnosis in Plunger Pump

Wang

Gong

et al. 2016

Shock and Vibration

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“…In order to ensure accurate motion control in presence of the model uncertainties, development of robust non-linear controllers is crucial. Various studies have been performed on the development of nonlinear controllers for position control [6][7], parameter-identification [8][9] and estimation of states [10]. Moreover, studies showing the application of adaptive control and feedback linearization for the control of electro hydraulic systems are reported in [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Modelling & Position Control for Electro-Hydraulic System

C S*,

Gupta

2019

IJRTE

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Electro-hydraulic systems (EHS) are widely used in industrial applications due to the high-power density and accuracy. However, EHS are highly nonlinear which makes its modelling and control aspects a complex process. In this paper, we present the modelling and position control for an electro-hydraulic system (EHS). The mathematical modelling is carried out considering the non-linearities like friction, discharge coefficient and load mass present in the system. A back-stepping control scheme is developed for maintaining the accuracy in the position control. The closed-loop stability of the proposed control system is analyzed with Lyapunov’s theory. The performance of the control system under the effect of bounded external uncertainties is validated with simulation study. The study indicates that the proposed controller gives an effective motion control in presence of the system uncertainties.

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“…In recent years, researches of hydraulic systems have focused on the trajectory tracking [1][2][3], state estimation [4], fault diagnosis [5] and parametric identification [6][7][8] for the sake of high performance control. Hydraulic excavator is the most popular construction machinery as its multiple working abilities.…”

Section: Introductionmentioning

confidence: 99%

Position control of nonlinear hydraulic system using an improved PSO based PID controller

Yin

Gong

et al. 2017

Mechanical Systems and Signal Processing

133

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Demodulation for hydraulic pump fault signals based on local mean decomposition and improved adaptive multiscale morphology analysis

Cited by 84 publications

References 27 publications

Optimum IMFs Selection Based Envelope Analysis of Bearing Fault Diagnosis in Plunger Pump

Optimum IMFs Selection Based Envelope Analysis of Bearing Fault Diagnosis in Plunger Pump

Modelling & Position Control for Electro-Hydraulic System

Position control of nonlinear hydraulic system using an improved PSO based PID controller

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