Eric van Es wrote:
>
> Wow! Big thing to explain!
>
> What it is: A summing amp (if you like) with and proportional, integral
> and derivative input. It adds them to obtain the desired effect.
>
> Note: PID is feedback control! It is a controller that conditions your
> input to the plant, moter, etc.
>
> P: Output is proportional to the input. Basically an amplifier.
I'm sure you mean 'proportional to the error' ?

> I: Integrates the output of the system's error and applies a signal that
> will (theoretically) remedy this.
> D: Output is proportional to the rate of change of the error on the
> output of the system.

--
Friendly Regards

Tjaart van der Walt
mailto:tjaart@wasp.co.za
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