초록 ▼

Vibrations within ceramic matrix and metal matrix composite materials are controlled by applying an excitation voltage to an array of piezoelectric actuators mounted to the surface of such materials. The actuators are driven in response to the phase shift of monochromatic light transmitted through a

Vibrations within ceramic matrix and metal matrix composite materials are controlled by applying an excitation voltage to an array of piezoelectric actuators mounted to the surface of such materials. The actuators are driven in response to the phase shift of monochromatic light transmitted through a grid of optical fibers embedded within the composite materials. Applications include active vibration suppression, de-icing, and on-line structural integrity monitoring.

대표청구항 ▼

A system for controlling deformation of a structure, comprising: a composite material; a plurality of optical fibers embedded within said composite material; a light source connected to one end of each of said optical fibers; a light phase shift detector connected to an opposite end of each of said

A system for controlling deformation of a structure, comprising: a composite material; a plurality of optical fibers embedded within said composite material; a light source connected to one end of each of said optical fibers; a light phase shift detector connected to an opposite end of each of said optical fibers; a plurality of piezoelectric actuators connected to said material; and control means connected to said light phase shift detector and to said piezoelectric actuators for providing an excitation voltage to said piezoelectric actuators as a function of phase shift of light transmitted from said light source to said light phase shift detector.