Contents
How does a sine sweep vibration test work?
During a sine sweep test, a vibration shaker pans, or “sweeps,” through a range of frequencies. The motion of the shaker is sinusoidal; however, the frequency of the vibration increases or decreases throughout the test. One sweep equals a single pass from a minimum to maximum frequency or vice versa, depending on the software.
What is the name of the sine sweep?
A sine sweep is a sine function that gradually changes frequency over time. The sine sweep can also be called “sinusoidal sweep,” “frequency sweep”, or “chirp”.
Which is the specific range for frequency sweep?
The specific range to sweep is the start and stop frequencies. The rate at which the generator will sweep the frequencies is set as the sweep time and return time.
Is it slow to record a sine sweep?
Sine sweeps, however, and sine sweep recordings in practice could be relatively long, which would make this convolution very slow.
How is spectral width calculated for sine sweep?
The spectral width can be calculated to first order to help in setting up your “Dwell” area (normally done for Sine on Random) testing to investigate the response around resonance (see Ch4 in figure). The Spectral width will be approximately Another thing to take note of is the delta in response to Sine input.
How are vibration levels amplified in resonance test?
As the test approaches the Resonance frequency, the tester can set the G level (normally with a margin of safety) and “dwell” around that Frequency band of interest. At resonance, vibration levels applied are amplified by the Amplification Factor (aka Quality Factor) Q.
Can a product be exposed to a resonant frequency?
A product exposed to a resonant frequency can bring about damage, as the natural vibration is amplified. The identification of resonant frequencies is essential for product development and qualification.