Phase in Vibration Analysis: Theory, Applications, and Examples
This article is intended to help the reader develop an understanding of the concept of phase as it applies to vibration and signal analysis. Simple [...]
Mobility: The Missing Piece in Vibration Analysis (Part 2): From Theory to Force Spectra
This is Part 2 of a two-part series adapted from the original paper “Mobility: A New Approach to Measuring Actual Forces in Machinery” by Alan [...]
Mobility: The Missing Piece in Vibration Analysis (Part 1): Why More Vibration Isn’t Always Worse
By Alan Friedman & Glenn White This is Part 1 of a two-part series adapted from the original paper “Mobility: A New Approach to [...]
Linear vs. Non-Linear Systems Explained | Machine Faults in Action | Part 3
By Alan Friedman This is Part 3 of our three-part series on linear and non-linear systems in machinery. If you haven’t read Part 1 [...]
Linear vs. Non-Linear Systems Explained | Identifying Machine Health | Part 2
By Alan Friedman This is Part 2 of our three-part series on linear and non-linear systems in machinery. If you missed Part 1, we [...]
Linear vs. Non-Linear Systems Explained | Machinery Vibration | Part 1
By Alan Friedman This is Part 1 of our three-part series on linear and non-linear systems in machinery. In this first instalment, we’ll introduce [...]
The Azima Difference: Precise Condition Monitoring With No Added Labor Costs
By K.C. Dahl, Engineer, Azima Predictive machinery tests and monitoring have evolved significantly, offering a variety of techniques, methodologies, and tools. While many of [...]
When Linear Lies: What You’re Not Seeing in Your Vibration Data
Many people in the vibration field prefer to view their spectra using a linear amplitude scale. “The spectra are simpler [...]
How Demodulation Helps You Detect Bearing Faults Early
Demodulation — also known as enveloping — is one of the most powerful tools in a vibration analyst’s toolkit, especially [...]
What Is The “Crest Factor” And Why Is It Used?
By Alan Friedman, DLI Engineering The Crest Factor is equal to the peak amplitude of a waveform divided by the [...]