Researchers
from
the
École
polytechnique
fédérale
de
Lausanne
(EPFL)
in
Switzerland
have
developed
an
articulated
hand
that
can
extend
the
reach
of
a
robotic
arm
by
detaching
and
crawling
away
on
its
own
to
grab
things.
The
research
was
recently
presented
at
the
International
Conference
on
Robotics
and
Automation
(ICRA)
and
was
spotted
by
IEEE
Spectrum
magazine.
Due
to
their
strength
and
speed,
robotic
arms
are
typically
permanently
attached
to
floors
or
other
structures
for
added
stability,
which
limits
their
reach.
The
goal
of
the
research,
conducted
at
the
EPFL’s
Learning
Algorithms
and
Systems
Laboratory
(LASA),
was
to
develop
a
bimodal
robotic
hand
with
expanded
grasping
capabilities,
including
occasional
independence
from
the
robot
arm
it’s
attached
to.
The
hand
can
detach
and
reattach
to
a
robot
arm
as
needed.GIF:
YouTube
Robot
hands
are
usually
designed
with
a
single
goal
in
mind:
to
hold
onto
things.
To
develop
one
that
could
do
that
and
crawl
around
on
its
own
like
the
Addams
Family’s
Thing,
the
researchers
generated
and
refined
a
basic
design
using
a
genetic
algorithm
(which
relies
on
biological
tricks
like
natural
selection
and
evolution)
and
the
MuJoCo
physics
simulator
to
test
the
practicality
of
iterations.
The
algorithm
and
simulations
helped
the
researchers
determine
the
optimal
position
and
number
of
articulated
fingers
needed,
which
turned
out
to
be
five,
in
a
similar
layout
to
human
hands.
The
robotic
hand
also
uses
a
magnetic
connector
at
the
wrist,
allowing
it
to
attach
and
detach
from
an
arm
autonomously.
The
robotic
hand’s
fingers
can
bend
in
both
directions
so
it
can
crawl,
but
it
also
allows
the
hand
to
grasp
two
objects
at
once
when
attached
to
a
robot
arm.GIF:
YouTube
The
hand’s
fingers
can
bend
in
both
directions,
allowing
it
to
use
some
of
them
to
lift
objects
while
the
rest
function
as
tiny
legs.
This
design
also
expands
the
usefulness
of
the
hand
while
it’s
attached
to
a
robot
arm.
It
can
lift
multiple
objects
at
once
without
twisting
the
arm
around
to
reposition
unused
fingers.
The
hand
is
also
considerably
smaller
than
robots
like
Boston
Dynamics’
Spot,
which
can
freely
locomote
using
four
legs.
Spot
has
already
been
upgraded
with
its
own
robot
arm
and
grasper,
but
with
an
articulated
hand
that
operates
independently,
it
could
be
better
equipped
to
explore
or
analyze
areas
Spot
can’t
squeeze
into.
Original author: Andrew Liszewski
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