Dynamic load fixture for rotary mechanical systems

Measuring and testing – Dynamometers – Responsive to torque

Reexamination Certificate

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Reexamination Certificate

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07080565

ABSTRACT:
A dynamic load fixture (DLF) for testing a unit under test (UUT) includes a lateral load system that applies a time-varying lateral load profile to the UUT drive shaft and an encoder that measures its angular rotation. An isolation stage suitably constrains the encoder from rotating about the axis while allowing it to move in other directions in which the application of the lateral force induces motion. The lateral load system includes a load bearing around the drive shaft, an actuator that applies a lateral force to the load bearing, a force sensor for measuring the applied lateral force, and a lateral controller for adjusting a command signal to the actuator to implement a lateral load profile. The DLF may also include a torsion load system that applies a time-varying torsion load profile to the drive shaft.

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patent: 5107080 (1992-04-01), Rosen
patent: 5133211 (1992-07-01), Brown et al.
patent: 5247839 (1993-09-01), Okutani et al.
patent: 6938500 (2005-09-01), Beaman et al.
patent: 6941822 (2005-09-01), Yao

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