Accurate Measurement of Reciprocating Kinetic Friction Coefficient Through Automatic Detection of the Running-In

Tribological tests are adopted to estimate the kinetic friction coefficient (COF) of the material of interest according to the American Society for Testing and Materials (ASTM) standard. Typically, for the measurement process, several replicas, as well as a postprocessing data treatment, are necessa...

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Bibliographic Details
Published in:IEEE transactions on instrumentation and measurement 2020-05, Vol.69 (5), p.2398-2407
Main Authors: Ruggiero, Alessandro, Pan, Yong Mei, Liguori, Consolatina, Russo, Domenico, Sommella, Paolo
Format: Article
Language:English
Subjects:
Accuracy and repeatabilities
Accurate measurement
American society for testing and materials
Automatic Detection
Coefficient of friction
Data analysis
Dry friction
Electrical engineering
Experimental activities
Force
Friction
Geologic measurements
Instruments
Kinetic friction
Kinetic friction coefficient
Measurement process
measurement time
measurement uncertainty
Metals
Outliers (statistics)
Statistical analysis
Statistical approach
Statistical methods
Steady state
Surface topography
Time measurement
Tribology
tribometers
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Summary:Tribological tests are adopted to estimate the kinetic friction coefficient (COF) of the material of interest according to the American Society for Testing and Materials (ASTM) standard. Typically, for the measurement process, several replicas, as well as a postprocessing data treatment, are necessary to take into account the observed casual variability of the measurand. This article describes a statistical approach aiming to highlight the running-in phase and the most significant time intervals during the steady-state for each test replica. A two-steps procedure based on the adoption of the bootstrap method allows the automatic detection of the running-in time interval and the outlier filtering of the steady-state. Experimental activity has been carried out by performing multiple tests through the ball-on-flat tribometer in order to verify the improvement allowed by the authors' proposal about the dry friction COF measurement in terms of both accuracy and repeatability.
ISSN:0018-9456
1557-9662
1557-9662
DOI:10.1109/TIM.2020.2974055