Speed Tagging

The purpose of speed tagging is to normalize a group of spectra to rotational orders rather than frequency. When measuring vibration levels, there is often the requirement to compare spectrum plots of different operating speeds. Order normalization allows for such comparisons of synchronous or non-synchronous components of spectrums related to different rotating speeds. This method is particularly useful in the vibration analysis of variable speed machinery and particularly on paper machines where the paper speeds are varied from production run to production run. Another problem associated with these machines is that the paper speed is not constant as the paper is processed from the wet through to the dry sections. Order normalization based on sectioned speed ratios compensates for this variation and allows for the entry of one paper speed to normalize to order format.