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http://dx.doi.org/10.5139/JKSAS.2007.35.6.489

Measurements of the Pitch Dynamic Stability Derivatives of a Standard Dynamics Model Using a Forced Vibration Technique  

Cho, Hwan-Kee (공군사관학교 항공우주공학과)
Kim, Seung-Pil (공군군수사령부)
Baek, Seung-Woock (공군사관학교 항공우주공학과)
Chang, Jo-Won (한국항공대학교 항공운항학과)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.35, no.6, 2007 , pp. 489-495 More about this Journal
Abstract
An experimental study was carried out in order to measure the pitch dynamic stability derivatives of a standard dynamics model in a low-speed wind tunnel. When a trigger signal is generated, the aircraft model starts oscillation with constant amplitudes and frequencies provided by DC electrical servomotor. The measured data are simultaneously recorded on a data recorder for 25 cycles of the model oscillation. The Phase shift needed to compute the dynamic stability derivatives is determined by calculating differences between the peak values of the input and output signals from the dynamic stability balance. Stabilator effects on the stability derivatives were also investigated with deflection angles. Although the driving apparatus and experimental equipments manufactured creatively for this study are different from other experiments, the variational trend of dynamic stability derivatives with the angle of attack is in a good accordance with the results of TPI, NAE, and FFA.
Keywords
Dynamic Stability Derivatives; Forced Vibration Technique; Standard Dynamics Model;
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