29 April 2014 Optical feather and foil for shape and dynamic load sensing of critical flight surfaces
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Abstract
Future flight vehicles may comprise complex flight surfaces requiring coordinated in-situ sensing and actuation. Inspired by the complexity of the flight surfaces on the wings and tail of a bird, it is argued that increasing the number of interdependent flight surfaces from just a few, as is normal in an airplane, to many, as in the feathers of a bird, can significantly enlarge the flight envelope. To enable elements of an eco-inspired Dynamic Servo-Elastic (DSE) flight control system, IFOS is developing a multiple functionality-sensing element analogous to a feather, consisting of a very thin tube with optical fiber based strain sensors and algorithms for deducing the shape of the “feather” by measuring strain at multiple points. It is envisaged that the “feather” will act as a unit of sensing and/or actuation for establishing shape, position, static and dynamic loads on flight surfaces and in critical parts. Advanced sensing hardware and software control algorithms will enable the proposed DSE flight control concept. The hardware development involves an array of optical fiber based sensorized needle tubes for attachment to key parts for dynamic flight surface measurement. Once installed the optical fiber sensors, which can be interrogated over a wide frequency range, also allow damage detection and structural health monitoring.
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Richard J. Black, Richard J. Black, Joannes M. Costa, Joannes M. Costa, Fereydoun Faridian, Fereydoun Faridian, Behzad Moslehi, Behzad Moslehi, Mehrdad Pakmehr, Mehrdad Pakmehr, Jon Schlavin, Jon Schlavin, Vahid Sotoudeh, Vahid Sotoudeh, Andrei Zagrai, Andrei Zagrai, } "Optical feather and foil for shape and dynamic load sensing of critical flight surfaces", Proc. SPIE 9064, Health Monitoring of Structural and Biological Systems 2014, 90642S (29 April 2014); doi: 10.1117/12.2063057; https://doi.org/10.1117/12.2063057
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