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High Accuracy Piezoelectric Device
N J I T
posted on 06/30/2009
An apparatus and method for utilizing piezoelectric devices for precise positioning purposes without having to endure the detrimental effects of hysteresis. The apparatus and method involving driving a pair of piezoelectric stacks with complementary low amplitude, high frequency dither signals produced by an oscillating source. The complementary low amplitude, high frequency dither arrangement, referred to as an intermediate dither, is self-compensating so that no residual dither is transmitted to a load attached to one of the stacks. Furthermore, the dithering of each stack results in a virtual elimination of hysteresis in the material of the piezoelectric stacks.
File Number: 95-005
Other Information:
310/326; 310/316; 310/328;
310/358;356/350
| Patent Number(s): | 5686777 |
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Principal Investigator:
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Timothy Chang
Innovations (4) Publications (1) |
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Case Manager:
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Office of Technology Development
Innovations (52) |
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