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    AI Overview
    Aircraft wing deflection measurement
    involves techniques like photogrammetry, fiber-optic strain sensing, and electro-optical systems to monitor wing bending, twist, and deformation in real-time during flight or ground tests . These methods ensure structural integrity and aerodynamic efficiency, often measuring up to 26 feet of deflection, such as on the Boeing 787.
    Key Measurement Methods
    • Photogrammetry/Video Systems : Cameras installed on the fuselage track targets on the wing, using software to convert video to 3D coordinates, providing high-accuracy, non-contact measurements of bending and twist.
    • Fiber-Optic Strain Sensors : Lightweight fiber-optic systems calculate wing deflection and slope in real-time by measuring strain, offering a lower-weight alternative to traditional, heavy wire-based strain gauges.
    • Electro-Optical (FDMS) : A Flight Deflection Measurement System (FDMS) uses infrared LED targets and receivers to measure wing shape and twist under aerodynamic loads.
    • Strain-Based Analysis : Utilizing strain gauges to measure local deformation and infer total deflection through structural modeling, often used for monitoring high-aspect-ratio wings.
    Applications
    • Structural Health Monitoring: Assessing real-time structural integrity and validating aerodynamic models.
    • Aerodynamic Load Calculation: Improving performance through active aerodynamic tuning and load alleviation.
    • Flight Testing: Verifying predicted wing bending and torsion for new aircraft designs.
    These techniques are essential because, as highlighted, modern, highly flexible aircraft wings (e.g., Boeing 787, Airbus A350) require precise monitoring of significant in-flight flexion.
    • Wing deformation measurement using the stereo-vision ...
      Introduction. For flight testing of a new aircraft, wing deformation measurement is both vital in terms of checking aerodynamic ch...
      ScienceDirect.com
    • Computation of Wing Deflection and Slope from Measured ...
      Feb 28, 2018 — A lightweight, robust fiber-optic system is the technology behind a new method to compute wing deflection and slope from measured ...
      Tech Briefs
    • Boeing In-Flight Wing Deflection Measurement
      Jun 13, 2023 — The Video Displacement System (VDS) is a photogrammetry system developed by Boeing Research and Technology Group to measure wing d...
      CMSC.org
    Show all
    • Wing deformation measurement using the stereo-vision ...
      Introduction. For flight testing of a new aircraft, wing deformation measurement is both vital in terms of checking aerodynamic ch...
      ScienceDirect.com
    • Computation of Wing Deflection and Slope from Measured ...
      Feb 28, 2018 — A lightweight, robust fiber-optic system is the technology behind a new method to compute wing deflection and slope from measured ...
      Tech Briefs
    • Boeing In-Flight Wing Deflection Measurement
      Jun 13, 2023 — The Video Displacement System (VDS) is a photogrammetry system developed by Boeing Research and Technology Group to measure wing d...
      CMSC.org
    • How Much Do Airplane Wings Flex? | Blog- Monroe Aerospace
      Jun 4, 2025 — It's completely normal for an airplane's wings to flex during flight. The Boeing 787's wings, for instance, can flex as much as 26...
      Monroe Aerospace
    • Wing Shape Sensing from Measured Strain
      Introduction. EAL-TIME measurement of the deflection and slope of aerospace structures in flight is a valuable tool for improving ...
      NASA (.gov)
    • Determination of Stores Pointing Error Due to Wing Flexibility Under ...
      The 10-cm focal length receiver had a vertical field of view of 14° while the 20-cm focal length receiver had a vertical field of ...
      NASA (.gov)
    • Measurement of Aeroelastic Wing Deflections on a Remotely ...
      Sep 2, 2020 — This choice was made for several reasons including its reliability regardless of outdoor lighting, relatively lightweight processi...
      UVicSpace
    • Predicted and measured in-flight wing deformations of a forward- ...
      Jan 1, 1990 — NTRS - NASA Technical Reports Server ... Predicted and measured in-flight wing deformations of a forward-swept-wing aircraft An el...
      NASA (.gov)
    • Methods for In-Flight Wing Shape Predictions of Highly Flexible ...
      IN–FLIGHT WING SHAPE MONITORING In-flight wing deformation monitoring of ultralightweight flying wing aircraft such as the Helios ...
      NASA (.gov)
    • Wing Twist Measurements at the National Transonic Facility
      A technique for measuring wing twist currently in use at the National Transonic Facility is described. The technique is based upon...
      NASA (.gov)
    • High Accuracy In-Flight Wing Deformation Measurements ...
      Aircraft wings are subject to deflection. Designers must therefore take in-flight wing bending and torsion into account, so that s...
      Netherlands Aerospace Centre
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    Wing Shape Sensing from Measured Strain


    NASA (.gov)
    https://ntrs.nasa.gov › api › citations › downloads
    NASA (.gov)
    https://ntrs.nasa.gov › api › citations › downloads
    PDF
    by C Pak · 2015 · Cited by 91 — EAL-TIME measurement of the deflection and slope of aerospace structures in flight is a valuable tool for improving aircraft performance, safety, and efficiency ... Read more
    25 pages

    Wing deformation measurement using the stereo-vision ...


    ScienceDirect.com
    https://www.sciencedirect.com › article › abs › pii
    ScienceDirect.com
    https://www.sciencedirect.com › article › abs › pii
    by Y Liu · 2021 · Cited by 18 — This study proposes a method to correct the effect of the camera movements to enable accurate wing deformation measurement using a stereo-vision system. Read more

    High Accuracy In-Flight Wing Deformation Measurements ...


    Netherlands Aerospace Centre
    https://reports.nlr.nl › bitstreams › download
    Netherlands Aerospace Centre
    https://reports.nlr.nl › bitstreams › download
    PDF
    2009 · Cited by 16 — The aircraft wing deflection was measured under various load conditions ranging from 0g to 2.5g. Optical displacements of a randomly speckled part of the wing ... Read more

    Boeing In-Flight Wing Deflection Measurement


    CMSC.org
    https://www.cmsc.org › boeing-in-flight-wing-deflection...
    CMSC.org
    https://www.cmsc.org › boeing-in-flight-wing-deflection...
    Jun 13, 2023 — The Video Displacement System (VDS) is a video camera-based photogrammetry system developed by the Boeing Research and Technology Group to measure the wing ... Read more
    aircraft wing deflection measurement from www.cmsc.org

    Wing Deflection Measurement in Istra4D V4.11 ...


    Dantec Dynamics
    https://www.dantecdynamics.com › notes › wing-deflecti...
    Dantec Dynamics
    https://www.dantecdynamics.com › notes › wing-deflecti...
    Jan 28, 2025 — In this application video, point (marker) tracking is used to measure the deflection on a model aircraft . The detected markers are coded and ... Read more
    aircraft wing deflection measurement from www.dantecdynamics.com

    Computation of Wing Deflection and Slope from Measured ...


    Tech Briefs
    https://www.techbriefs.com › 21262-drc-013-019
    Tech Briefs
    https://www.techbriefs.com › 21262-drc-013-019
    Feb 28, 2018 — A lightweight, robust fiber-optic system is the technology behind a new method to compute wing deflection and slope from measured strain of an aircraft. Read more

    In-Flight Wing Deformation Measurement System for Small ...


    University of Michigan
    https://deepblue.lib.umich.edu › download
    University of Michigan
    https://deepblue.lib.umich.edu › download
    PDF
    by ZY Pang · 2014 · Cited by 27 — This paper presents a new method to measure wing deflections in flight for small UAVs. It employs a pair of high resolution stereo cameras and LED wing ... Read more

    Wing Displacement Measurement Tests


    Acuity Laser
    https://www.acuitylaser.com › laser-sensors › case-studies
    Acuity Laser
    https://www.acuitylaser.com › laser-sensors › case-studies
    Mar 20, 2023 — The “wing up-bend test” which test the mechanical integrity the wing when being displaced upwards. On March 28, loads were applied to the test unit. Read more
    aircraft wing deflection measurement from www.acuitylaser.com
    Missing: deflection ‎| Show results with: deflection

    Measure wings in flight - Fraunhofer IOSB


    Fraunhofer-Institut für Optronik, Systemtechnik und Bildauswertung IOSB
    https://www.iosb.fraunhofer.de › press › press-releases
    Fraunhofer-Institut für Optronik, Systemtechnik und Bildauswertung IOSB
    https://www.iosb.fraunhofer.de › press › press-releases
    Apr 5, 2023 — The aerodynamic uplift and the change in tank load influence the curvature: The wings deflect upward by several meters , depending on the flight ... Read more
    aircraft wing deflection measurement from www.iosb.fraunhofer.de

    In-flight deflection measurement of the HiMAT aeroelastically ...


    Aerospace Research Central
    https://arc.aiaa.org › doi › pdf
    Aerospace Research Central
    https://arc.aiaa.org › doi › pdf
    by VM DeAngelis · 1982 · Cited by 28 — An electro-optical flight deflection measurement system was developed for NASA for use on the highly maneuverable aircraft technology (HiMAT) remotely ... Read more
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