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Thank you all. 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.

ETSSolution Slip-Tables claim they are good to 2000hz but read the quote from the brochure "Cross-axis motion is constrained and is typically less than 10% of input at frequencies up to 2000 Hz. except at resonance." And that's the crutch, they all work good, "except at resonance", which beyond...

Yes IRstuff you are right; however, to test parts of the size and weight we have our table is large enough to have resonances below our max test frequency. In some cases we test to 2000hz on a 48 inch slip-plate. This particular slip-plate is 24" If someone has a design for a 48 inch slip-plate...

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...

Many systems are not linear as amplitude increases. As amplitude increases there will be some reduction in response frequency. usually, once back to a low er amplitude the response frequency will return to it's previous higher frequency. While frequency shift is not your problem in this case...