Flight validation of an embedded structural health monitoring system for an unmanned aerial vehicle

Kressel, I and Dorfman, B and Botsev, Y and Handelman, A and Balter, J and Pillai, ACR and Prasad, MH and Gupta, Nitesh and Joseph, AM and Sundaram, Ramesh and Tur, M (2015) Flight validation of an embedded structural health monitoring system for an unmanned aerial vehicle. Smart Materials and Structures, 24 (7). pp. 1-10. ISSN 0964-1726

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    Abstract

    This paper presents the design and flight validation of an embedded fiber Bragg gratings (FBG) based structural health monitoring (SHM) system for the Indian unmanned aerial vehicle (UAV), Nishant. The embedding of the sensors was integrated with the manufacturing process, taking into account the trimming of parts and assembly considerations. Reliable flight data were recorded on board the vehicle and analyzed so that deviations from normal structural behaviors could be identified, evaluated and tracked. Based on the data obtained, it was possible to track both the loads and vibration signatures by direct sensors’ cross correlation using principal component analysis (PCA) and artificial neural networks (ANNs). Sensor placement combined with proper ground calibration, enabled the distinction between strain and temperature readings. The start of a minor local structural temporary instability was identified during landing, proving the value of such continuous structural airworthy assessment for UAV structures.

    Item Type: Journal Article
    Additional Information: Copyright to this article belongs to M/s. Institute of Physics Publishing
    Uncontrolled Keywords: Fiber bragg grating;Smart structure;Structural health monitoring
    Subjects: AERONAUTICS > Aeronautics (General)
    AERONAUTICS > Aerodynamics
    Division/Department: Other, Other, Other, Other, Other, Other, Other, Advanced Composites Division, Other, Advanced Composites Division, Other
    Depositing User: Ms. Alphones Mary
    Date Deposited: 04 Jul 2016 15:54
    Last Modified: 04 Jul 2016 15:54
    URI: http://nal-ir.nal.res.in/id/eprint/12490

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