Evaluation and Improvement of Accuracy in the Instantaneous Angular Speed (IAS) and Torsional Vibration Measurement Using Zebra Tapes

Palermo, Antonio; Janssens, Karl; Britte, Laurent

doi:10.1007/978-3-319-20463-5_4

Cited by 5 publications

(3 citation statements)

References 11 publications

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“…Therefore, the above presented algorithm works well for angular displacement identify of outliers in the condition of periodic fluctuation of speed. The main factors causing the measuring errors are sampling rate and rotational speed, setting appropriate parameters, the measurement error will be limited to required range [7].…”

Section: Experimental Studymentioning

confidence: 99%

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Outliers Identification From Instantaneous Angular Speed Signal Generated by Zebra Tapes

Lin

et al. 2019

IEEE Access

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Instantaneous angular speed (IAS) measurement using zebra tape has been presented as an advantageous tool for rotating machinery surveillance. Unfortunately, both butt joint and mounting imperfection of the zebra tape result in stripes with different widths, which cause the outliers appear in the acquired signal. This paper proposed a solution to accurately identify the outliers and define the angular displacement values represented by outliers in the condition of periodic fluctuation of speed. The procedure is based on K-means clustering method and Fourier series model. Specially, a series of algorithms take K-means clustering partitioning method as core, and is used for outliers identification; the Fourier series fitting model is used to analyze the angular displacement values represented by outliers. Experimental study was performed on a test rig to validate the method under different measurement conditions. The result of error analysis shows the effectiveness of the algorithm.INDEX TERMS Instantaneous angular speed (IAS), outliers, zebra tape, K-means clustering, Fourier fitting model.

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Section: Experimental Studymentioning

confidence: 99%

“…It is extremely important to make reliable and accurate fault diagnosis [4], [5] and health evaluation [6]. Instantaneous angular speed is one of the important parameters to indicate the health status of rotating machinery [7]. In practice, the primary issue is to acquire accurate speed fluctuation signal.…”

Section: Introductionmentioning

confidence: 99%

Outliers Identification From Instantaneous Angular Speed Signal Generated by Zebra Tapes

Lin

et al. 2019

IEEE Access

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“…André et al [11] studied the accuracy of the counting system used to estimate the IAS , and Leclere et al [12] made a deeper analysis of the measurement errors and their influence on the speed estimation, taking the irregularity of the magnetic coder and the jitter of the clock into account. Palermo et al [13] proposed a calibration tool to minimize the geometrical error when estimating the angular speed with zebra-tapes.…”

Section: Introductionmentioning

confidence: 99%

Reconstructing shaft orbit using angle measurement to detect bearing faults

Bruand

Chatelain²,

Granjon³

et al. 2020

Mechanical Systems and Signal Processing

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The use of Instantaneous Angular Speed (IAS) in condition monitoring of rotating machines is an appealing alternative to traditional approaches such as those based on accelerometers: the direct angular sampling characteristic of IAS measurements has proven to be a favoured framework to study mechanical phenomena involved in rotating machines. Physical models have been established to link the variations of IAS to torque disturbances in case of mechanical fault such as bearing failure. In this paper an original point of view is given on the IAS measurement by linking IAS variations and shaft vibrations. First the orbit of a rotating shaft is studied to show that it contains useful information about the health state of the bearing. Then angle position sensors traditionally used in IAS measurements are combined to reconstruct this orbit. It is shown that IAS measurements are sensitive to the shaft vibrations, which may be used advantageously to enhance the diagnosis possibilities. Finally the links between various defect sizes and the reconstructed orbits are investigated to propose a fault severity indicator.

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