Turbomolecular high-vacuum pump bearings diagnostics using temperature and vibration measurements

Daga, Alessandro Paolo; Garibaldi, Luigi; Bonmassar, Luca

doi:10.1109/metroind4.0iot51437.2021.9488508

Cited by 4 publications

(3 citation statements)

References 15 publications

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“…To conclude, the here proposed improved methodology fosters the on-line condition monitoring of turbomachines and could be used for diagnostic purposes if an anomaly detection (e.g., [24][25][26][27][28][29][30]) is conducted on the vibration signal of the different blades.…”

Section: Discussionmentioning

confidence: 99%

Key-Phase-Free Blade Tip-Timing for Nonstationary Test Conditions: An Improved Algorithm for the Vibration Monitoring of a SAFRAN Turbomachine from the Surveillance 9 International Conference Contest

Daga

Garibaldi

et al. 2021

Machines

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A turbomachine is a fundamental engineering apparatus meant to transfer energy between a rotor and a fluid. Turbomachines are the core of power generation in many engineering applications such as electric power generation plants, aerospace, marine power, automotive etc. Their relevance makes them both mission critical and safety critical in many fields. To foster reliability and safety, then, continuous monitoring of the rotor is more than desirable. One promising monitoring technique is, with no doubt, the Blade Tip-Timing, which, being simple and non-invasive, can be easily implemented on many different rotors. Blade Tip-Timing is based on the recording of the time of arrival of the blades passing in front of a probe located at a fixed angular position. The non-contact nature of the measurement prevents influences on the measured vibration, that can be recovered for all the blades simultaneously, possibly even online. In this regard, a novel algorithm is presented in this paper for obtaining a good estimate of the vibration of the blades with minimum system complexity (i.e., only one Blade Tip-Timing probe) and minimum computational effort, so to create a simple vibration monitoring system, potentially implementable online. The methodology was tested on a dataset from a SAFRAN turbomachine made available during the Surveillance 9 international conference for a diagnostic contest.

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Section: Discussionmentioning

confidence: 99%

Key-Phase-Free Blade Tip-Timing for Nonstationary Test Conditions: An Improved Algorithm for the Vibration Monitoring of a SAFRAN Turbomachine from the Surveillance 9 International Conference Contest

Daga

Garibaldi

et al. 2021

Machines

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“…[11]. In principle, this corresponds to the setting of a threshold through a hypothesis testing for normality [12], which can be considered a Novelty Detection (or Anomaly Detection) task, as "Novelty" (i.e., a deviation from the normal behaviour), can be used as a damage indicator in absence of confounding influences [13][14][15][16][17].…”

Section: Iso20816-based Signal Processing and The Proposed Improvementmentioning

confidence: 99%

“…Even if one feature outperforms the others in some cases, in fact, no general rule can be derived, so that the RMSvelocity of relative vibration and the peak-to-peak absolute vibration remain the reference features. In this regard, a multivariate Novelty Detection able to merge the information from multiple features was proposed by the authors in [11][12][13][14][15][16][17] to improve the basic univariate approach and proved successful in many different applications.…”

Section: Weaknesses and Possible Improvementsmentioning

confidence: 99%

Vibration monitoring of a hydroelectric power generation unit: Improved indicators of rotor health based on orbital analysis

Daga

Garibaldi

Cuvato³

et al. 2022

Mechanics & Industry

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Hydropower generation units (HGUs) are electromechanical systems meant to transform the potential energy of flowing water (i.e., a renewable energy source) into electrical energy. Thanks to their high manoeuvrability and green footprint, nowadays, HGUs are mission-critical assets for grid operators, as the global energy policy is pushing for a more ecological and healthier energy production. Condition monitoring becomes then a fundamental task for fostering safety while optimizing the maintenance regime of such HGUs. In this regard, this work is meant to improve an ISO20816-based vibration monitoring system by proposing further rotor health indicators based on orbital analysis. The proposed improvement is implemented on a real HGU of the Signayes hydroelectric power plant from C.V.A. S.p.A. − Compagnia Valdostana delle Acque − Compagnie Valdôtaine des Eaux.

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Least squares smoothed k-nearest neighbors online prediction of the remaining useful life of a NASA turbofan

Viale

Daga

Fasana

et al. 2023

Mechanical Systems and Signal Processing

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Turbomolecular high-vacuum pump bearings diagnostics using temperature and vibration measurements

Cited by 4 publications

References 15 publications

Key-Phase-Free Blade Tip-Timing for Nonstationary Test Conditions: An Improved Algorithm for the Vibration Monitoring of a SAFRAN Turbomachine from the Surveillance 9 International Conference Contest

Key-Phase-Free Blade Tip-Timing for Nonstationary Test Conditions: An Improved Algorithm for the Vibration Monitoring of a SAFRAN Turbomachine from the Surveillance 9 International Conference Contest

Vibration monitoring of a hydroelectric power generation unit: Improved indicators of rotor health based on orbital analysis

Least squares smoothed k-nearest neighbors online prediction of the remaining useful life of a NASA turbofan

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