Is the bode plot easy to get ?

I can only speak for process plants, but there the answer is *no*. For all
sorts of reasons, some technical, some organisational.

e41090178489@i18g2000pro.googlegroups.com...

On the other hand, if you're working on a product in a lab then getting a
frequency response sweep is often quite easy.  Usually just a few sweeps
will do to get your initial data, although you'll find yourself doing
multiple sweeps as details change.  If you have a resonance then either
do the entire sweep with a very small frequency step, or do a sweep right
around the resonance to pick up the detail.

But Bruce is correct -- doing a frequency sweep on an entire oil refinery
is a bit of a stretch, particularly when you're using expensive raw
ingredients to produce out-of-spec crap that has to be thrown away as
hazardous waste.  Ditto for same on a new jet airliner.

--
http://www.wescottdesign.com