Jung-Ryul Lee et al 2003 Smart Mater. Struct. 12 147 doi:10.1088/0964-1726/12/1/317
Jung-Ryul Lee1, Chi-Young Ryu2, Bon-Yong Koo3, Sang-Guk Kang4, Chang-Sun Hong4 and Chun-Gon Kim4,5
Show affiliationsIn this paper, fiber Bragg gratings (FBGs) were applied to measure dynamic strains inside a subscale wing under real-time wind tunnel testing. Two re-coated FBGs were embedded in the wing skin. The FBG sensor system includes a wavelength swept fiber laser with a wavelength indicator and fast signal processing modules. The agreement among the three kinds of sensor inside the subscale wing (FBG, electric strain gauge and PZT sensor) was confirmed in the bench test. The optical fiber strain sensors had an excellent resolution (< 5με) in the time domain and could detect a frequency response up to 100 Hz. Through the wind tunnel test of the subscale smart wing, the flutter was experimentally detected using FBG sensors and their usefulness as an in-flight health monitoring system was demonstrated.
81.70.Bt Mechanical testing, impact tests, static and dynamic loads
81.70.Fy Nondestructive testing: optical methods
07.60.Vg Fiber-optic instruments
Instrumentation and measurement
Optics, quantum optics and lasers
Issue 1 (February 2003)
Received 30 January 2002, in final form 20 September 2002
Published 29 January 2003
Jung-Ryul Lee et al 2003 Smart Mater. Struct. 12 147
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