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http://dx.doi.org/10.9766/KIMST.2016.19.4.476

The Study of Hinge Moment Measurement in Wind Tunnel Test Using Single Wheatstone Bridge Flexure  

Cho, Cheolyoung (The 1st Research and Development Institute, Agency for Defense Development)
Park, Jongho (Department of Mechanical Engineering, Chungnam National University)
Publication Information
Journal of the Korea Institute of Military Science and Technology / v.19, no.4, 2016 , pp. 476-482 More about this Journal
Abstract
In this study, a method using single Wheatstone bridge flexure has been presented to measure hinge moment acting on control surfaces of wind tunnel models. The structural simplicity of the flexure reduces difficulty regarding gauging and wire-routing, and also makes it feasible to install flexures even inside thin wings. Some flexures were designed and fabricated under typical aerodynamic loads in wind tunnel test, and the strains on the flexure according to applied loads were compared with the result of the analysis by finite element method. The relation between applied loads and output signals showed good linearity, and the standard deviation on the residual errors from linear equation obtained by least square method was within 1.0 % of the maximum design moments. In addition, the FEM analysis on the thickness of load-connecting part of the flexure showed that the sensitivity was improved as the thickness became thin as much as desired to avoid buckling.
Keywords
Hinge Moment Measurement; Wind Tunnel Test; Strain Gauge Flexure; Control Surface; FEM;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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