The load would be variable, but should be <100g. The driving waveform would=
 be stable in amplitude & the frequency would be variable in the sense that=
 I would like to ramp from DC to maximum frequency. This could be done slow=
ly.

The waveform should be anything you could think of, but I'd start with a si=
newave. I'd really want the mechanical displacement to be proportional to t=
he instantaneous input voltage.

Joe
________________________________________
From: piclist-bounces@mit.edu [piclist-bounces@mit.edu] On Behalf Of Russel=
lMc [apptechnz@gmail.com]
Sent: 31 August 2013 12:11
To: Microcontroller discussion list - Public.
Subject: Re: [OT]: Need a fast mechanical linear displacement generator

> I need a linear displacement generator with displacements of in the order
of 0.2-1mm or so at frequencies of
> up to ~1KHz or more if possible. I'm hoping to input a sine wave of
varying amplitude and frequency and have
> linear motion (vibration) of the unit in response to the input signal. I'=
d

More information would help
eg mass to be moved is highly relevant.
If it's only always a sine wave then some cheating may be possible.
If the sine wave is stable in amplitude and frequency throughout a 'test'
and if it is allowed to ramp up or settle to this state it may all help.

I BOTE guesstimate that for a non-cheating pure voice coil driver based
system you'd need around 2 watts delivered energy per gram of load
(E&OE/YMMV/calculate it yourself to check). Assuming I've not dropped a
power of 10 or few along the way, well inside existing speaker driver
capability for loads in the few grams range.


    Russell
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