Actuated truss system

Details Actuated truss system Actuated truss system

1989-02-22

1990-09-18

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310319, H01L 4108

Patent

active

049581007

ABSTRACT:
A truss member includes a piezoelectric stack and a cylindrical shell formed of composite material surrounding the stack and bonded thereto, such that the axial load is distributed between the shell and the stack. The truss is fitted to a structural assembly via end pieces, and electrodes are attached to the stack, which may be selectively actuated to achieve different effects. In one aspect, a shunt or resonant feedback circuit damps a truss resonance mode; in another aspect an electrode bus attached to partial electrode surfaces on the stack allows the selective excitation of bending moments. The composite shell shields the stack from the environment, resulting in a robust control structure of low effective mass.

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patent: 4742261 (1988-05-01), Rich et al.
patent: 4849668 (1989-07-01), Crawley et al.

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