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 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. © 1963-2012 IEEE.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Maskinteknik -- Tribologi (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Mechanical Engineering -- Tribology (hsv//eng)

Nyckelord

Friction

measurement time

measurement uncertainty

tribology

tribometers

Electrical engineering

Instruments

Accuracy and repeatabilities

Accurate measurement

American society for testing and materials

Automatic Detection

Experimental activities

Kinetic friction coefficient

Measurement process

Statistical approach

Publikations- och innehållstyp

ref (ämneskategori)

art (ämneskategori)