Piezoelectric dither motor

Details Piezoelectric dither motor Piezoelectric dither motor

1989-08-15

1991-01-22

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310328, 310323, 356350, H01L 4108

Patent

active

049873342

ABSTRACT:
Dither motor apparatus for oscillating a structure, such as a laser gyroscope 10, about a dither axis "A". The dither motor apparatus includes a support 18 that passes through an opening 16 within the gyroscope. The apparatus further includes a plurality of piezoelectric elements 22 individual ones of which are interposed between an outer surface of the support and an inner surface of the opening such that an outer surface of each of the elements is rigidly coupled to the inner surface of the opening and an inner surface of each of the elements is rigidly coupled to the outer surface of the support. The apparatus further includes a source 24 of alternating current coupled to electrodes 26 for energizing the plurality of piezoelectric elements for causing each of the elements to shear such that the outer surface of each of the elements rotates alternately clockwise and counter-clockwise with respect to the inner surface of each of the elements, thereby imparting an oscillatory motion to the gyroscope about the dither axis.

REFERENCES:
patent: 2488586 (1949-11-01), Diemer
patent: 2686882 (1954-08-01), Mallinckrodt
patent: 3211931 (1965-10-01), Tehon
patent: 3573960 (1971-06-01), Duncan
patent: 4160184 (1979-07-01), Ljung
patent: 4180892 (1980-01-01), Jenson
patent: 4210837 (1980-07-01), Vasiliev et al.
patent: 4211951 (1980-07-01), Jensen
patent: 4349183 (1982-09-01), Wirt et al.
patent: 4392935 (1982-08-01), Kallmeyer et al.
patent: 4453103 (1984-06-01), Vishneusky et al.
patent: 4523120 (1985-01-01), Assard et al.
patent: 4565941 (1986-01-01), Ridgway et al.

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