> On Fri, 26 Jan 2001 02:15:51 +0100, Kjell Arne Gai
> >When the controller is running in a computer it can also relatively easy
> >be made adaptive. The control loop parameters will then be adjusted, in
> >run time, to compensate for deviation in the motor parameters due to
> >production and age. Then we can have even higher loop gain and better
> >servo performance. If this is done in digital servos of today i do not
> Which sevoes actualy do that? Or is that just speculation and
> whishful thinking? Where can I find block diagrams or transfer
> functions suitable for simulating and analyzing model R/C servos,
> gyros, and controlers?
As i said, i do not know how advanced the controllers in the current
digital servos are. If the contoller is implemented in software it will
be very difficult to find out anything about it. I do not think that any
manufactuerer will publish their source code. If you want to take a look
at the documentation and source code for some more general motor and
servo controllers go to some DSP manufacturer like TI. With
microcontrollers of today you can run a very advanced control loop for a
motor as simple as a brushed DC.
With analog servos it is easier because they are often designed with an
integrated circuit where the data sheet is available from the chip
Take a look at MC33030 from Motorola, M51660L from Mitsubishi or the
good old NE544.