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A novel model-based Cauchy-Schwarz divergence condition indicator for gears monitoring during fluctuating speed conditions.

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Title: A novel model-based Cauchy-Schwarz divergence condition indicator for gears monitoring during fluctuating speed conditions.
Authors: Puerto-Santana, Cristian1,2 (AUTHOR) cristian.puerto@upc.edu, Ocampo-Martinez, Carlos2 (AUTHOR) carlos.ocampo@upc.edu, Diaz-Rozo, Javier1 (AUTHOR) jdiaz@ainguraiiot.com
Source: Journal of Sound & Vibration. Dec2024, Vol. 592, pN.PAG-N.PAG. 1p.
Subjects: Industrialism, System identification, Fault diagnosis, Statistical measurement, Signal processing
Abstract: Gear monitoring and fault diagnosis are vital for preventing accidents and minimizing economic losses in transportation and industrial systems. Traditional methods use vibration sensors and a two-stage analysis approach: preprocessing data to remove noise and extract relevant components, and generating a condition indicator to detect behavioral anomalies in the gears over time. Time synchronous averaging is a notable tool for monitoring gears at constant speeds. Such a tool filters sensor signals and extracts rotation-related components by using statistical measurements as condition indicators. However, it has limitations in scenarios with time-varying sampling rates and fluctuating speeds, where statistical measures may not fully capture changes in system parameters. This article proposes a novel methodology for monitoring gears in multivariate rotordynamical systems under fluctuating speed conditions. The method integrates time synchronous averaging, system identification algorithms, and statistical tools. It generates a time-synchronous average signal considering speed fluctuations, computes a state–space model of gear behavior in healthy states, extracts residual data from a data-driven model, and generates a condition indicator based on the Cauchy–Schwarz divergence. The proposed methodology was evaluated using experimental data from three rotor dynamical setups under different operational conditions. Validation showed its effectiveness, especially under high-load conditions with significant speed fluctuations. • A novel methodology for gears monitoring spinning at fluctuating angular speed is proposed. • The proposed methodology is based on signal processing and system identification techniques. • A condition indicator for gear diagnosis based on Cauchy–Schwarz divergence is established. • Experimental validation was conducted using two rotodynamic setups. • The methodology is compared with existing methods in the literature. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:Gear monitoring and fault diagnosis are vital for preventing accidents and minimizing economic losses in transportation and industrial systems. Traditional methods use vibration sensors and a two-stage analysis approach: preprocessing data to remove noise and extract relevant components, and generating a condition indicator to detect behavioral anomalies in the gears over time. Time synchronous averaging is a notable tool for monitoring gears at constant speeds. Such a tool filters sensor signals and extracts rotation-related components by using statistical measurements as condition indicators. However, it has limitations in scenarios with time-varying sampling rates and fluctuating speeds, where statistical measures may not fully capture changes in system parameters. This article proposes a novel methodology for monitoring gears in multivariate rotordynamical systems under fluctuating speed conditions. The method integrates time synchronous averaging, system identification algorithms, and statistical tools. It generates a time-synchronous average signal considering speed fluctuations, computes a state–space model of gear behavior in healthy states, extracts residual data from a data-driven model, and generates a condition indicator based on the Cauchy–Schwarz divergence. The proposed methodology was evaluated using experimental data from three rotor dynamical setups under different operational conditions. Validation showed its effectiveness, especially under high-load conditions with significant speed fluctuations. • A novel methodology for gears monitoring spinning at fluctuating angular speed is proposed. • The proposed methodology is based on signal processing and system identification techniques. • A condition indicator for gear diagnosis based on Cauchy–Schwarz divergence is established. • Experimental validation was conducted using two rotodynamic setups. • The methodology is compared with existing methods in the literature. [ABSTRACT FROM AUTHOR]
ISSN:0022460X
DOI:10.1016/j.jsv.2024.118610