(Georgia Institute of Technology, 2012)
Sprigle, Stephen; Chung, Bummo; Meyer, Tobias
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.
(Georgia Institute of Technology, 2010-06)
Lopez, Ricardo A.; Sonenblum, Sharon Eve; Sprigle, Stephen
In this study, a method for the robust detection of manual wheelchair movement with accelerometer-based data logging is used to obtain metrics of wheelchair mobility that complement mean- and total-distance-only based measurements. It is found that these metrics, that include distance, time and number of activity bouts, provide better understanding of everyday use of manual wheelchairs by shedding more light into how users operate their wheelchairs in their daily lives.
(Georgia Institute of Technology, 2010)
Dao, Phuc; Sprigle, Stephen; Caspall, Jayme; Ferri, Aldo A.; Eicholtz, Matthew; Wang, Stan
The goal of this project was to produce a test device and
methodology capable of measuring the mechanical efficiency
of manual wheelchairs. The result would provide an objective
measure of wheelchair performance that are required to
effectively prescribe wheelchairs and to code wheelchairs
properly for reimbursement.
(Georgia Institute of Technology, 2010)
Eicholtz, Matthew; Sprigle, Stephen; Ferri, Al; Caspall, Jayme; Dao, Phuc; Wang, Stan
Mass properties are important parameters in
dynamic systems analysis, but may be difficult
to estimate for irregularly-shaped objects. Specifically, the iMachine is designed to
analyze manual wheelchairs in an effort to
determine the propulsion efficiency using the
Anatomical Model Propulsion System (AMPS).