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In this paper we present
a novel pointing parallel mechanism with fully decoupled degrees of
freedom. The mechanism consists of two interconnected slider-crank linkages,
each one of which independently actuates one of the Euler angles of
the output link. Motors can be mounted on the frame. The parallel architecture
provides the mechanism with compactness and robustness, while decoupling
of motion guarantees a wide workspace, an easy mathematical treatment,
and a simple control. Such a mechanism may be suitable for applications
that require aiming bodies such as tools, telescopes, antennas, cameras,
solar panels, human or humanoid artificial limbs, particularly if requisites
on dimensions and stoutness on the one hand and mobility on the other
are stringent. |