Abstract
A hybrid piezoelectric/fiber optic diagnostic system has been developed for quicknon-destructive evaluation and long term health monitoring of aerospace vehicles andstructures. The hybrid diagnostic system uses piezoelectric actuators to input a controlledexcitation to the structure and fiber optic sensors to capture the correspondingstructural response. The system consists of three major parts: a diagnostic layerwith a network of piezoelectric elements and fiber gratings to offer a simple andefficient way to integrate a large network of transducers onto a structure; diagnostichardware consisting of an arbitrary waveform generator and a high speed fibergrating demodulation unit together with a high speed data acquisition card toprovide actuation input, data collection, and information processing; and diagnosticsoftware to determine the condition of the structure. This paper presents keydevelopment issues related to the manufacturing of the hybrid piezoelectric/fiberoptic diagnostic layer and integration of a highly portable diagnostic hardware.Validation and proof testing of this integrated diagnostic system are also presented.
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