Determining operating revolution rate, working pressure, pivot angle for axial piston machine involves frequency analysis of detected sound in solid, liquid or air signal from machine

摘要

The method involves determining the system parameters by frequency or harmonic analysis of a detected sound in solid signal, a sound in liquid signal or a sound in air signal from the axial piston machine. The operating revolution rate is derived from the fundamental frequency of the variation in piston force derived from the frequency analysis divided by the number of pistons.