What is the purpose of enveloping in vibration analysis?

Enveloping is a technique used in vibration analysis primarily to isolate and identify high-frequency components that are indicative of specific faults in machinery, such as bearing failures or gear problems. By applying an envelope detection process, analysts can capture the amplitude variations in high-frequency signals that may be obscured by the lower-frequency vibrations and noise present in the overall vibration signature.

This method is particularly advantageous because certain faults generate characteristic high-frequency patterns that, when isolated, can provide critical insights into machinery health that may not be apparent in standard vibration measurements. Enveloping processes help to accurately diagnose and monitor the condition of rotating equipment, thus allowing for timely interventions and maintenance strategies.