Method and apparatus for controlling a bimorph leaf which suppor

Details Method and apparatus for controlling a bimorph leaf which suppor Method and apparatus for controlling a bimorph leaf which suppor

1986-03-04

1987-05-05

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310316, 310319, 310326, 310332, 360 77, H01L 4108, G11B 552

Patent

active

046635556

ABSTRACT:
An apparatus for controlling a deflectable head mounted on a bimorph leaf having a detector connected to the latter for detecting a deflection of the bimorph leaf, a drive signal generating circuit for generating a drive signal to deflect the bimorph leaf in response thereto, a combining circuit for combining output signals of the detector and the drive signal generating circuit, a damping signal generating circuit for generating a damping signal to attenuate a distortion of the bimorph leaf that is produced by the deflection of the bimorph leaf, a signal producing circuit for generating a signal corresponding to a variation of the detector that remains after application of the damping signal to the bimorph leaf, and a circuit connected between the signal producing circuit and the combining circuit for compensating and thereby reducing the signal corresponding to the remaining variation of the detector.

REFERENCES:
patent: 4093885 (1978-06-01), Brown
patent: 4099211 (1978-07-01), Hathaway
patent: 4259605 (1981-03-01), Rijckaert
patent: 4395741 (1983-07-01), Kobayashi et al.
patent: 4513334 (1985-04-01), Otsuka
patent: 4594526 (1986-06-01), Araki et al.

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