[amsat-bb] Re: Motor for Yaesu G5500 Azimuth Rotator?

Joe Fitzgerald jfitzgerald at alum.wpi.edu
Fri Feb 24 11:58:40 PST 2012

On 2/23/2012 3:23 PM, Phil Karn wrote:
> These variable frequency/variable voltage AC motor drives have long been
> common in industry, and they've become the standard in hybrid and newer
> electric cars.


Your fans will not be completely happy until your controller runs a 
state-space model of the motor/antenna system, with software that is 
careful to generate acceleration and jerk limited commands such that 
mechanical resonances are not excited.

With tongue firmly in cheek
-Joe KM1P

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