Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1997-05-15
1999-10-26
Dougherty, Thomas M.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310331, 310353, H01L 4108
Patent
active
059734418
ABSTRACT:
The vibration and electrical characterization of a piezoelectric tactor actuator is described. The actuator is a rectangular laminated flat plate with two opposite sides simply supported and two others free. Under an axial compression from the supports, the plate deforms into a stressed shallow shell. Electrical high frequency harmonic signals within relatively low-frequency bursts are applied to the piezoelectric layers. Depending on the axial compression and pre-deflection, frequency and magnitude of electrical input, the tunable actuator exhibits frequency/mode-controlled high-force over large area vibrations with intense displacement jumps. A single-degree-of-freedom model and simplified 1-D models are provided. The tactor provides efficient conversion of electrical energy into mechanical.
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Churchill Russell J.
Decker Lawrence H.
Groger Howard P.
Lo K. Peter
Moses Howard J.
American Research Corporation of Virginia
Creighton Wray James
Dougherty Thomas M.
Narasimhan Meera P.
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