Humanetics Q6, Руководство пользователя

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033-9900 User Manual Q6 (Advanced 6 year old) Rev. M
©2016 Humanetics Innovative Solutions Inc.
©
Page 16 of 96
3. The Upper Neck Load Cell does not require any correction for measurement of
the moment around the OC joint. The (theoretical) OC joint coincides with the
neutral axis of the moment measurement of the (Humanetics) load cell.
4. Additional accelerometers may be mounted in the dummy for
additional/redundant information. There are no fixed points for attaching these
accelerometers. Instead, double-sided tape may be used to attach the
accelerometer to the desired location. Two accelerometers may be used to
measure deformation velocity and the deformation itself. The procedure is as
follows:
Install the accelerometers in the dummy. The sensitive axes of the transducers
should be aligned as good as possible. Furthermore, the accelerometers
should be installed in locations that are expected to retain their alignment
during the deformation phase. Make sure that the accelerometers are not
located on positions that may contact other parts of the dummy as a result of
deformation. To process and combine the data, first filter both signals at
CFC1000 according to SAE J211. Subtract the signals and integrate the result.
This results in the deformation velocity. Numerical integration of the
calculated velocity signal gives the deformation itself.
Note that this method gives an approximation of the actual deformation. The
accuracy is limited due to the fact that the accelerometers do not remain
properly aligned during the test and the numerical integrations that include
the small measurement errors of the accelerometers cumulative in the velocity
and displacement result. The longer the time interval is the larger the
cumulative error can be. Experience with the Q3 dummy shows that usage of
the acceleration integration method results in an under-estimation of the
deformation. At 4.3 m/s initial impact velocity the error is approximately 10%.
At 6.7 m/s it is approximately 20%.
5. ASIS load-cells for the Q6 dummy are currently under development. Prototypes
are available and evaluation testing is ongoing.