Wind tunnel investigations have been conducted in order to determine the aerodynamic and structural deflection characteristics of a new inflatable wing design for unmanned aerial vehicles (UAVs). The wings were tested over a range of dynamic pressures from 0 to 400 N/m2 and angles of attack from 0° to 16° corresponding to below the minimum stall speed up to speeds resulting in wing buckling. Since the inflatable wing stiffness varies as a function of the internal inflation pressure, the inflation pressure was varied below the design pressure in order to examine the effect of reduced stiffness on wingtip twist and bending. In order to accurately record deflections across the entire wing, photogrammetry was used as the measurement technique. The inflatable wings display a wash-in deformation behavior, increasing the span-wise angle of attack as the wing bends. Vibrational analysis was conducted using XModal for modal parameter estimation and measured in the wind tunnel using a laser displacement sensor. At an inflation pressure of 41.4 kPa (6 psi) the measured broadband frequency response due to dynamic loading is ±10 Hz.
|Title of host publication||Collection of Technical Papers - 48th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference|
|Number of pages||22|
|State||Published - 2007|
|Event||48th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference - Waikiki, HI, United States|
Duration: Apr 23 2007 → Apr 26 2007
|Name||Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference|
|Conference||48th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference|
|Period||4/23/07 → 4/26/07|
Bibliographical noteFunding Information:
We would like to acknowledge the sponsorship of National Nature Science Foundation Project (U1562215), National Grand Project for Science and Technology (2016ZX05024-004), Natural Science Foundation of Shandong (BS2014NJ005), Science Foundation from SI-NOPEC Key Laboratory of Geophysics (33550006-15-FW2099-0027) and the Fundamental Research Funds for the Central Universities.
ASJC Scopus subject areas
- Materials Science (all)
- Aerospace Engineering
- Mechanics of Materials
- Mechanical Engineering