Posted in Physical Sciences, Test & Measurement on
Saturday, September 01 2012
accurate inertial navigation system
(INS) is coupled with GPS receivers to
provide stable and highly accurate positioning,
attitude, and inertial measurements
while being subjected to highly
dynamic maneuvers. In contrast to conventional
methods that use extensive,
ground-based, real-time tracking and
control units that are expensive, large,
and require excessive amounts of power
to operate, this method focuses on the
development of an estimator that makes
use of a low-cost, miniature accelerometer
array fused with traditional measurement
systems and GPS. Through the use
of a position tracking estimation algorithm,
onboard accelerometers are
numerically integrated and transformed
using attitude information to obtain an
estimate of position in the inertial
frame. Position and velocity estimates
are subject to drift due to accelerometer
sensor bias and high vibration over time,
and so require the integration with GPS
information using a Kalman filter to provide
highly accurate and reliable inertial
tracking estimations.
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