The biggest servos I know of are those that keep
the modern type of windmill pointing into the wind.
They too have problem with deadband logic. To
save the motors from constantly adjusting the
windmills direction they simply lock up the shaft
(by the help of a really big disc brake)
till the error between rotor direction and
wind becomes too great (there is a time factor,
so corrections are not carried out instantly, thus
again saving the servo motor.
Maybe this could be applied to model airplane servos -
mechanical brake locking the surface till the pilot
wiggles his sticks?
Tord S Eriksson
www.tord.nu
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