| Project ID |
BPN608 |
| Website |
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| Start Date |
Tue 2011-Feb-01 20:20:57 |
| Last Updated |
Wed 2013-Feb-06 14:10:21 |
| Abstract |
We present a gyroscope operating mode that reduces bias errors and scale factor drift and allows whole angle read-out. The gyroscope proof mass orbits in a circle at its natural frequency. An outside observer rotating under the proof mass then perceives a frequency change. If the observer rotates in the same direction as the orbital spin, the perceived frequency decreases, and in the opposite direction, the frequency increases. The addition of a second gyroscope that spins in the opposite direction enables a differential measurement, reducing temperature sensitivity. The frequency difference is exactly the angular rate; thus, the phase difference is the whole angle. Rate bias errors due to mechanical quadrature and cross-axis damping are periodic on the current angle of the proof mass relative to the sensor frame and are hence averaged out over one cycle. A 3-theta dual ring gyroscope chip with integrated CMOS buffer electronics and an off-chip controller demonstrates the technique. |
| Status |
Continuing |
| Funding Source |
Federal |
| IAB Research Area |
Physical Sensors & Devices |
| Researcher(s) |
Mitchell H. Kline, Igor Izyumin, Yu-Ching Yeh, Burak Eminoglu |
| Advisor(s) |
Bernhard E. Boser |
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