"Measurement of Aircraft Stability Parameters in the Wind Tunnel Using a
Wind Driven Manipulator"
J.C.Magill L.A.Darden N.M.Komerath J.F.Dorsey
AIAA Paper 94-3457, Atmospheric Flight Mechanics Conference, Scottsdale,
AZ, August 1994.
A wind driven dynamic manipulator is used to derive stability parameters
of a lifting configuration in a wind tunnel. The parameters are deduced using
system identification techniques from the dynamics of the manipulator with
and without the configuration attached. The need for direct measurement of
forces is obviated. The manipulator is represented by a second order linear
model in the identification. This model is validated by comparing results
from the actual system with a mathematical simulation of the manipulator.
The measurement technique is validated by comparing pitch damping and stiffness
for a set of calibration specimens to the values predicted from the specimen
geometry. The results demonstrate that stability parameters of aircraft models
can be measured conveniently by this technique.