Comprehensive review of tribometer dynamics-Cycle-based data analysis and visualization

Abstract

Tribologists often rely on triboexperiments to investigate factors that affect a tribosystem. The inherent dynamic behavior of the respective tribometer setups and its effect on data interpretation remain often unknown. In this study, a comprehensive analysis of sensor data obtained from lubricated and dry triboexperiments is performed. Data are generated on a pin-on-disc test rig with a silicon nitride ball on a steel disc contact with a rotation frequency of ~3 Hz. High-speed acquisition of sensor data up to 5 kHz is performed to resolve changes in the data within individual cycles. The characteristic frequencies of the system and their temporal evolution are determined via time-frequency analysis, which reveals periodic patterns in the sensor data. Cycle-based data evaluation allows the detection of localized events and changes during an operation and considerably reduces the apparent measurement uncertainty, as compared with an unreduced dataset. The data analysis and visualization routines presented herein may serve as a prototype for further application to tribometer setups.

High-Precision Tribometer for Studies of Adhesive Contacts

“…For investigation of mechanical contacts of adhesive surfaces, high-precision force and positioning sensors are used as main components [ 6 , 7 , 8 ]. A number of tribometers and force sensors with a variety of measuring features have been designed recently for this purpose [ 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 ]. A central part of these experimental setups are force sensors manufactured by various electronics companies (see, for example, [ 18 ]).…”