| Summary: | 碩士 === 國立臺灣科技大學 === 機械工程系 === 107 === This work presents a novel design of the synchronised measuring system on the sliding forces, temperature and electrical current between the contacts of the nanoscale multilayer coating of workpieces in retrofit pin-on-disc tests. The full factorial experiments (3 × 3) were carried out for the evaluations of the normal load (10-30 N) and sliding speed (50-100 m/min) on the calculated coefficient of the thermal conductivity, friction and recorded electrical current were influenced by the uncertainties in the setup of the measuring devices such as delay of the plasticity in the contacts of the workpiece materials and delays in the heat transfer. The use of the statistical method of the random complete block design (RCBD) could examine the error sources and identified the interactions between the error sources as well as distributions of the errors. After removing the outliers points at first time, the synchronised measuring system is validated and presenting high precision levels up to 99.38%, 83.43% and 91.73% for the coefficient of friction, temperature and electrical current respectively. Further, high precision levels were up to 99.96%, 99.81% and 97.89% for the coefficient of friction, temperature and electrical current respectively at second time. It means the residual of the synchronised measuring system becomes to the steady state.
|
|---|
