Abstract
We explain how some recent results on the designof controls for nonoholomic systems withoutdrift can be extended to some classes of sytemswith drift. In particular, we show that a dynamicextension of a driftless system that satisfies theLie algebra rank condition necessary satisfies algebraicsufficient conditions for small-time localcontrollability at all its equilibrium points.1. Introduction.Many mechanical systems can be modelled as controlsystems of the form\Sigma : x = f 0...

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