The efficiency of precisely machined single phase external gear is 99.99% In order to accurately measure the efficiency of a gearbox with three external gears, a very high torque measuring device is required.
However, since a general torque meter measures a minute torsion amount of a large axis, a very large value fluctuation and a large noise are output.
Therfoce, a noise filter is used to attenuate the fluctuation width and noise, but the output valve is large than the input value due to distortion of the actual data value.
In this study, to measure the accuracy of the PTO gear box for 90 ton excavator, the accuracy of the measured value was improved by removing the noise components in a programmatic manner. In addition, noise generated by applying a Bessel filter And compared with the filtering results.