Hi Alexandre,

At 11:49 PM 12/4/01 -0200, you wrote:
>     We all know how hard it can be to stabilize a very unstable system ! The
>problem is not trivial at all and I am sure that many people had the same
>idea before and were not able to get it done. And besides that the
>integration of motors, gears, batteries and control system is awesome. It is
>not innovative as a technology launcher but it is a very good example of
>good pratical applied engineering.

I have not studied Ginger in detail, but as far as I can tell, it is just
keeping you vertical by the way it moves. This is a standard "inverted
pendulum problem" which is given to students in many first semester
feedback controls courses.

I'm sure most people on this list could make the necessary hardware.
Getting it all together in a robust package and working out all the bugs is
nontrivial, but it's nontrivial for any product (as you state, an "example
of good practical applied engineering", not a real innovation).


>     If it did not cost $ 3000 I would like to have one. It looks like a very
>nice toy :-)
>
>Best regards,
>Alexandre Guimaraes
>
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