Method and apparatus for structural, actuation and sensing in a

Details Method and apparatus for structural, actuation and sensing in a Method and apparatus for structural, actuation and sensing in a

1993-04-07

1995-08-08

Maki, Steven D.

Communications: electrical

Systems

Audible signals

73775, 156291, 310348, B29C 6552, H01L 41053

Patent

active

054401933

ABSTRACT:
An apparatus, system and method for actuating or sensing strains in a substrate which includes at least one actuator/sensor element which has transverse and longitudinal axes. The actuator/sensor element is attached to the substrate in such a manner that the stiffness of the actuator/sensor element differs in the transverse and longitudinal axes. In this manner, it is possible to sense or actuate strains in the substrate in a desired direction, regardless of the passive stiffness properties of the substrate, actuator element or sensor element. An isotropic actuator/sensor element attached to a substrate in this manner can then operate in an anisotropic way. In a preferred embodiment, the actuator/sensor element is bonded to the substrate at an area of attachment occupying only the central third of the actuator/sensor element in its longitudinal axes. The actuator/sensor element may be a piezoelectric, magnetostrictive, thermally actuated lamina (including bi-metallic) or shape memory alloy element.

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IBM Technical Disclosure Bulletin, vol. 14, No. 5, Oct. 1971, 310-328.

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