Assessment of the ISO Impact Damping Test
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Abstract
The
ISO
impact
damping
test
characterizes
wheelchair
cushion
abilities to
reduce
impact
loading
on
issues
and
to
help
maintain
postural
stability,
reporting
the
number
of
rebounds
greater
than
10%
of
the
peak
impact
acceleration
and
the
ratio
of
the
2nd
to
1st
rebound.
Based
upon
our
analysis,
3
critical
issues
have
been
identified.
1)
Impact
magnitude
should
be
part
of
the
analysis.
2)
Impact
should
be
used
instead
rebound
accelerations.
3)
Oscillation
from
impact
is
not
a
simple
2nd
order
damped
harmonic,
instead
several
natural
frequencies
are
embedded
in
the
damped
oscillation.
In
conclusion,
ISO
should
utilize
impact
accelerations
and
more
complex
analysis
to
characterize
the
damping
properties
of
wheelchair
cushions.
Sponsor
Date
2012
Extent
Resource Type
Text
Resource Subtype
Poster