Perpustakaan Digital ITB
A
method
of
improving
the
positioning
accuracy
of
deployable
space
structures
using
vibrations
was
developed,
and
its
effectiveness
was
demonstrated.
The
effects
of
vibration
characteristics
on
improvements
to
shape
repeatability
were
investigated
via
experiments
and
numerical
simulations.
An
experimental
model
consisting
of
a
beam,
spring,
and
ball
joint
was
developed,
and
it
was
used
to
simulate
a
portion
of
a
deployable
structure.
Macro-fiber
composite
actuators
were
attached
to
the
beam
to
generate
vibrations.
Experiments
were
conducted
while
changing
the
vibration
characteristics,
including
the
applied
voltage
for
the
actuator,
the
actuator
position,
and
the
frequency
and
duration.
Positions
of
the
beam,
after
applying
vibrations,
were
measured
using
a
laser
displacement
sensor,
and
the
results
were
compared.
A
corresponding
numerical
simulation
model
was
developed,
and
shape
repeatability
was
investigated.
The
results
indicated
that
the
shape
repeatability
was
improved
by
applying
vibrations
using
an
actuator
at
the
natural
frequency.
The
applied
voltage
had
a
large
impact
on
shape
repeatability,
and
the
effective
actuator
position
was
investigated
by
considering
the
model
force.
©
2018
Elsevier
Masson
SAS.
All
rights
reserved