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ZHAO Jun
GUAN Yingzi
QI Naiming
College of Astronautics,
Harbin Institute of Technology,
Harbin 150001, China
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ANALYSIS OF METHOD FOR DETER-MINING
AZIMUTH OF PRINCIPAL AXIS
OF INERTIA BASED ON DYNAMIC
BALANCE MEASUREMENT
Abstract:
The dynamic balance quality of a rotating object is an important factor to maintain the stability and accuracy for motion. The azimuth of the principal axis of inertia is a major sign of dynamic balance. A usual method is measuring moment of inertia matrix relative to some base coordinates on a rotary inertia machine so as to calculate the azimuth of principal axis of inertia. By using the measured unbalance results on the two trimmed planes on a vertical hard bearing double-plane dynamic balancing machine, the dimension and direction of couple unbalance can be found. An azimuth angle formula for the principal axis of inertia is derived and is solved by using unbalance quantities. The experiments indicate that method based on dynamic balancing measurement is proved rational and effective and has a fine precision.
Key words:
Dynamic balance machine Principal axis of inertia Azimuth |