Vibration Test Tolerances
Vibration Test Tolerances
(OP)
We have been given a requirement for a 0.5g sine sweep 5-2000hz with a tolerance of +-10%. So far we have not been able to maintain the +-10% at the shaker table resonant frequency (about 1300hz).
Has anyone ever found a solution to holding +-10% at the shaker table resonance?
The controller manufacturer says that +-10% at high frequencies cannot be controlled.
Thank you for your reply
Has anyone ever found a solution to holding +-10% at the shaker table resonance?
The controller manufacturer says that +-10% at high frequencies cannot be controlled.
Thank you for your reply





RE: Vibration Test Tolerances
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: Vibration Test Tolerances
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
RE: Vibration Test Tolerances
RE: Vibration Test Tolerances
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: Vibration Test Tolerances
If someone has a design for a 48 inch slip-plate with a resonance above 2Khz, I would be grateful.
I need to get the plots from another group.
RE: Vibration Test Tolerances
http://www.etssolution.com/slip-table-bt-600-800.p...
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
RE: Vibration Test Tolerances
And that's the crutch, they all work good, "except at resonance", which beyond about 20" X 20" is going to be less than 2000hz
I'm sure I could find locations on our slip=plate where I can get the results needed, but not across the entire surface.
RE: Vibration Test Tolerances
So it seems logical that your specifications are quite difficult to maintain.
RE: Vibration Test Tolerances
I'm going to experiment with the 1 g sweep, which seems to be the industry standard, and then start the process of changing the requirements. It has been rumored that it is a customer requirement, so it is going to be uphill task.
RE: Vibration Test Tolerances
RE: Vibration Test Tolerances
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
RE: Vibration Test Tolerances
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?