Demonstration of an actively damped composite part

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Abstract
A twin-core optical fiber sensor was cured into a graphite reinforced PEEK composite tube (6 feetlong and 2 inches in diameter). Aftercuring, the sensorwas interfaced to an electro-optics package to measure static and dynamic strain. During dynamic testing, signals from the embedded sensor were introduced into a control system to drive a piezoelectric, mass-reaction actuator. The damping coefficient of the first fundamental mode ofvibration was improved by more than a factor of 7 for large transient disturbances. Even better performance was observed for low level disturbances. Predictions from an analytic system modelcorrespond well with thelaboratory system and provide insight into optimization of control system parameters. This paper presents the details of the demonstration effort.© (1990) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

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