Impact Hammer Double Hit – An Investigation
An Impact Hammer double hit is viewed as a common problem, and most hammer impact testing software offers a "Double hit" rejection function. Signals captured with double impacts are not…
Some Basic Vibration Signal Qualities
This article discusses quantifying basic vibration signals from three aspects: signal type, signal level, and signal display format. Mathematical expressions and typical applications are also introduced. A simple harmonic vibration…
Fig1: Basic Workflow
Automated data capture, analysis and reporting
This post deals with automated data capture and analysis of data. It uses Prosig's DATS software and the worksheet environment it provides. The technique could be duplicated in other software…
Are My Hammer Impact Results Valid? (3) Time Invariance
As mentioned in our previous two articles, when performing experimental modal testing of a structure or component using impact (or ping) testing, it is important to consider and verify the…
Are My Hammer Impact Results Valid? (2) Reciprocity
As mentioned in our previous article, when performing experimental modal testing of a structure or component using impact (or ping) testing, it is important to consider and verify the validity…
Are My Hammer Impact Results Valid? (1) Linearity
When performing experimental modal testing of a structure or component using impact (or ping) testing, it is important to consider and verify the validity of any results. A modal analysis…
Hammer Testing: Free or fixed support?
A vital question to be asked before performing hammer testing is - how do I support the testing object? What fixing mechanism to use? Or technically, what are the desired…
