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This paper presents a preliminary study of the chaotic behavior of servo-flap mid-span bending of a four-blade helicopter during hover, low and high-speed forward flights. The servo-flap vibratory measurement was used to create state vectors in a multidimensional space through time-delay embedding, and the trajectory of state vectors in the reconstruction state space was quantified using the correlation...
We present the use of swept wavelength interferometry for distributed fiber-optic temperature measurements in a nuclear reactor. The sensors consisted of 2-m segments of commercially available, single mode optical fibers. The interrogation technique is based on measuring the spectral shift of the intrinsic Rayleigh backscatter signal along the optical fiber and converting the spectral shift to temperature.
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