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http://dx.doi.org/10.5139/JKSAS.2011.39.5.442

Measurement of Rotor Blade Deformation and Motions using Stereo Pattern Recognition Method  

Park, Jae-Won (한국과학기술원 항공우주공학과)
Kim, Hong-Il (한국과학기술원 항공우주공학과)
Han, Jae-Hung (한국과학기술원 항공우주공학과)
Kim, Do-Hyung (한국항공우주연구원)
Song, Keun-Woong (한국항공우주연구원)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.39, no.5, 2011 , pp. 442-450 More about this Journal
Abstract
A measurement system using stereo pattern recognition (SPR) method was configured to measure the rotor blade deformations and motions. An SPR-based measurement system was prepared using six stereo cameras. Through a series of experiments to evaluate the system measurement uncertainty, it was verified that the SPR system had less than 0.2mm standard uncertainty. The combined standard uncertainties for the lead-lag, flapping, and pitching motions were estimated as 0.296mm, 0.209mm, and $0.238^{\circ}$, respectively. The SPR system was installed at a general small-scaled rotor test system at Korea Aerospace Research Institute. The blade motions and elastic deformation were successfully measured under the conditions with rotating speeds of 360rpm or 589rpm, and collective pitch angles of $0^{\circ}$, $4^{\circ}$, or $6^{\circ}$. The advantages of the SPR system was analyzed in comparison with the measurement system used in Higher Harmonic Control Aeroacoustic Rotor Test -II.
Keywords
Rotor blade motion; Optical shape estimation; 3-D shape reconstruction; Stereo pattern recognition(SPR);
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