A parametric approach for the estimation of the instantaneous speed of rotating machinery

Rodopoulos, Konstantinos I.; Yiakopoulos, Christos; Antoniadis, Ioannis

doi:10.1016/j.ymssp.2013.02.011

Cited by 32 publications

(9 citation statements)

References 16 publications

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“…4,5 Torsional vibration–based misfire detection is attracting extensive attention because it can provide precise information about low-frequency components. 6,7 Numerous works have focused on signal sampling 8,9 and post-processing of vibration signals 10–12 over the past several decades, and an approach to misfire detection for a turbocharged diesel engine using neural networks has been proposed. 13…”

Section: Introductionmentioning

confidence: 99%

“…4,5 Torsional vibration-based misfire detection is attracting extensive attention because it can provide precise information about low-frequency components. 6,7 Numerous works have focused on signal sampling 8,9 and post-processing of vibration signals [10][11][12] over the past several decades, and an approach to misfire detection for a turbocharged diesel engine using neural networks has been proposed. 13 To use torsional vibration for misfire detection, different analytical models have been developed for small engines with rigid crankshafts 14,15 and for large engines with flexible crankshafts.…”

Section: Introductionmentioning

confidence: 99%

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Detection of engine misfire using characteristic harmonics of angular acceleration

Song

Gao

Zhang

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part D:

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A new torsional vibration–based method for the detection of engine misfires was proposed based on the discrete Fourier transform of angular acceleration of the crankshaft. By analysis of the sensitivity of the discrete Fourier transform to fluctuations in speed and load of the engine, the characteristic harmonics and characteristic discrete Fourier transforms of a cylinder were defined. Then cylinder misfires under any operating conditions were diagnosed by checking the characteristic discrete Fourier transforms of the cylinder at its characteristic harmonics. An experiment on a four-stroke, six-cylinder diesel engine showed that this method accurately identified misfire faults and the misfiring cylinders.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Detection of engine misfire using characteristic harmonics of angular acceleration

Song

Gao

Zhang

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part D:

View full text Add to dashboard Cite

show abstract

“…In the last few decades, spectrum [5][6][7][9][10][11][12] and cepstrum [10,[13][14][15] based methods used for rotational speed and malfunction analysis have attracted much attention from research teams. However, to the authors' best knowledge, there are very few publications available that discuss and compare the reliability of these two calculation methods [10,15].…”

Section: Introductionmentioning

confidence: 99%

Hybrid spectral speed determination method for rotary machines

Gardonyi¹,

Samu²

2019

J. vibroeng.

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Accurate rotational speed determination for rotary machines tends to be allocated high priority in technical applications. In some cases, it is not easy to measure shaft speed directly. Vibration diagnostic tools can offer an alternative solution to the problem posed by direct rotational speed measurement. Using calculated spectra and cepstra can help to determine the rotational speed easily and accurately. This paper examines the comparison of the spectrum and cepstrum based methods in terms of their applicable ranges and rotational speed estimation accuracy. Most papers which present similar comparisons state that the speed of rotary machines can be determined better with cepstrum calculation. However, this argument does not entirely stand up to scrutiny. This paper explains how to calculate the possible speed estimation error which arises out of the resolution of the discrete output data produced by the methodologies. The novel hybrid speed estimation logic uses these equations to decide which method results in the most accurate output. Numerous vibration measurements were made to test the usability of this hybrid method. It was successfully tested on electromotive drive trains, as well as spark-and compression-ignition internal combustion engines with different cylinder numbers and arrangements.

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“…Model-based (e.g. Kalman filter) ap-proaches demonstrate good accuracy [47][48][49], yet a patent limitation is that all harmonics have to be modeled -even those which are not of interestso as to produce a Gaussian residual. An important body of literature has also addressed the problem by using tailored time-frequency decomposition such as the Gabor transform and wavelet transforms [50][51][52][53][54][55].…”

Section: Introductionmentioning

confidence: 99%

A multi-order probabilistic approach for Instantaneous Angular Speed tracking debriefing of the CMMNO׳14 diagnosis contest

Leclère

André²,

Antoni

2016

Mechanical Systems and Signal Processing

107

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The aim of this work is to propose a novel approach for the estimation of the Instantaneous Angular Speed (IAS) of rotating machines from vibration measurements. This work is originated from the organisation, by the authors of this paper, of a contest during the conference CMMNO 2014, that was held in Lyon, december 2014. One purpose of the contest was to extract the IAS of a wind turbine from a gearbox accelerometer signal. The analysis of contestant contributions led to the observation that the main source of error in this exercise was the wrong association of one selected and tracked harmonic component with one mechanical periodic phenomenon, this association being assumed as an a priori hypothesis by all the methods used by the contestants. The approach proposed in this work does not need this kind of a priori assumption. A majority (but not necessarily all) periodical mechanical events are considered from a preliminary analysis of the kinematics of the machine (harmonics of shaft rotation speeds, meshing frequencies ...). The IAS is then determined from probability density functions that are constructed from instantaneous spectra of the signal. The efficiency and robustness of the proposed approach are illustrated in the frame of the CMMNO 2014 contest case.

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A parametric approach for the estimation of the instantaneous speed of rotating machinery

Cited by 32 publications

References 16 publications

Detection of engine misfire using characteristic harmonics of angular acceleration

Detection of engine misfire using characteristic harmonics of angular acceleration

Hybrid spectral speed determination method for rotary machines

A multi-order probabilistic approach for Instantaneous Angular Speed tracking debriefing of the CMMNO׳14 diagnosis contest

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