Helping robots hold on (MIT)
_Since the 1970s, when early autonomous underwater vehicles (AUVs) were
developed at MIT, Institute scientists have tackled various barriers to robots
that can travel autonomously in the deep ocean. This four-part series examines
current MIT efforts to refine AUVs’ artificial intelligence, navigation,
stability and tenacity._
If an underwater robot is to open a valve or repair a damaged pipe, it needs
to anchor itself to a solid surface so it can apply force to carry out its
task without pushing itself away. It then needs to detach and move on to its
next assignment.
A group of MIT researchers has designed a “controllable adhesion system” for
underwater robots that offers the needed features: a high holding force on
various geometries and textures, low energy consumption, chemical resistance
to seawater, and low maintenance requirements.
Underwater vehicles have become good at using propellers and thrusters to stay
in one place, even in strong currents. But holding on to a surface while
exerting force to do a job is quite another challenge — one that Sangbae Kim,
the Esther and Harold E. Edgerton Assistant Professor of Mechanical
Engineering, and his collaborators have been tackling for the past year. They
are working …
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