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design, construction, and calibration of a dynamometer used to measure forces applied by a magnetic bearing to a rotating shaft
A force measurement dynamometer has been constructed which
bearing housings which utilize strain gage measurements to
calibration of the flexmounts was performed with the primary
coupling between the primary axes of measurement and a
critical speed locations. Finally, a static force
cross-coupled stiffnesses, and 2) providing ample sensitivity
determine the magnitude of radial loads transmitted through
for accurate force measurement while maintaining sufficient
forces applied by a magnetic bearing to a rotating shaft.
goal of measuring the forces applied by the magnetic bearing
lumped-inertia model of the rotor-bearing system to confirm
measurements to simplify calibration procedures and reduce
named flexnounts, mounted directly to the shaft support
objectives: 1) minimizing coupling in the strain gage
of the system. Analytical verification of the design was
provided via a finite element model to determine the level of
radial stifffiess to keep the first critical speed of the
rotor-bearing system above the maximum operating shaft speed
The dynamometer consists of two force measurement assemblies,
the shaft. The design of the flexmounts focused on two main
to within I︢% accuracy over the widest range of forces
will be the primary instrument used to measure the dynamic
"Major subject: Mechanical Engineering".