Festfrequenzprüfung Guide

Next time you see an unexplained harmonic in your FFT, don't just sweep past it. Lock on. Test fixed. Find the truth. Looking to implement Festfrequenzprüfung in your facility? Start with a portable shaker and a dual-channel FFT analyzer capable of "tracking" mode—most modern units from Brüel & Kjær or Siemens Simcenter offer this functionality.

In the world of mechanical diagnostics, the spotlight often shines on sweep tests or resonance searches —slowly ramping a machine through its RPM range to find natural frequencies. festfrequenzprüfung

While a resonance search asks "Where is the problem?" a fixed frequency test asks "How bad is the problem right now?" Literally translating from German to "fixed frequency examination," this method involves exciting a structure or rotating machine at a single, constant frequency over a defined period. Unlike modal analysis (which sweeps through a spectrum), the Festfrequenzprüfung holds one specific oscillation frequency steady. Next time you see an unexplained harmonic in

But there is a quieter, more specialized sibling in the testing family: (Fixed Frequency Testing). Find the truth