Factors affecting accurate measurement of fluid borne noise characteristics of fluid power pumps

Abstract

This paper presents analytical analysis and experimental research on the fundamental factors affecting the accurate measurement of fluidborne noise characteristics of fluid power pumps. Particular attention is paid to such factors as fluid transmission line model and parameters affecting pipeline characteristic impedance and propagation coefficient, time-shared characteristic of pressure dual-channel sampling, and high frequency dynamics and locations' measuring accuracies of the pressure sensors used in the measurement. Their influences have been clarified clearly and some effective approaches to eliminate the influences have been proposed.