[Robotgroup] Drive a Droid proposal... How to detect the "fence"?

[Alex Iles]

> Clendon Gibson wrote:
>  > If you are good with geometry, then you can put encoders on
>  > the wheels and calculate your position by dead reckoning.
>
> Friction errors accumulate as the wheels move over the surface and slide
> on occasion. You would have to rely on external, calibrations and
> corrections for any deviation caused by accumulated error. The amount of
> calibrations would depend on the surface, the wheels and the number of
> events that could cause slip (i.e. hard starts and stops, turns etc).
>

It's also very difficult to dead reckon wheel progression through turns...

-ai