JordonMusser
Mechanical
- Dec 22, 2006
- 40
we recently ran a sine sweep and several random sweeps on a new vibration fixture to verify that we can pass through the various excitations frequencies of the fixture and still meet the customer req for deviation from expected input data.
We used a tri-ax accelerometer as our control, and the axis being tested passed all testing with flying colors. We did however notice at high freq, around 1khz (where we believe our first naturual freq of this fixture to be) the other two axis went from ~0Grms to levels similar to the control axis, even tho the control axis was spot on what it should be. The accelerometer was secured with wax near the product interface.
our customer is fine with this, as they have no requirements for cross coupling.
Should I be concerned? anything else to look at? i've never used a tri-ax like this so this was unexpected and want to explore further?
We used a tri-ax accelerometer as our control, and the axis being tested passed all testing with flying colors. We did however notice at high freq, around 1khz (where we believe our first naturual freq of this fixture to be) the other two axis went from ~0Grms to levels similar to the control axis, even tho the control axis was spot on what it should be. The accelerometer was secured with wax near the product interface.
our customer is fine with this, as they have no requirements for cross coupling.
Should I be concerned? anything else to look at? i've never used a tri-ax like this so this was unexpected and want to explore further?