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기술보고서

기술보고서 게시판 내용
타이틀	DESIGN OF CONTROL LAWS FOR FLUTTER SUPPRESSION BASED ON THE AERODYNAMIC ENERGY CONCEPT AND COMPARISONS WITH OTHER DESIGN METHODS
저자	Eli Nissim (Technion - Israel Inst. of Tech.)
Keyword	Aeroelastic research wings; Control systems design; Control theory; Energy methods; Flutter analysis; Vibration damping
URL	http://www.dfrc.nasa.gov/DTRS/1990/PDF/H-1549.pdf
보고서번호	NASA-TP-3056
발행년도	1990
출처	NASA Dryden Flight Research Center
ABSTRACT	The aerodynamic energy method is used to synthesize control laws for NASAchr(39)s drone for aerodynamic and structural testing-aerodynamic research wing 1 (DAST-ARW1) mathematical model. The performance of these control laws in terms of closed-loop flutter dynamic pressure, control surface activity, and robustness is compared with other control laws that relate to the same model. A control law synthesis technique that makes use of the return difference singular values is developed. It is based on the aerodynamic energy approach and is shown to yield results that are superior to those results given in the literature and are based on optimal control theory. Nyquist plots are presented, together with a short discussion regarding the relative merits of the minimum singular value as a measure of robustness as compared with the more traditional measure involving phase and gain margins.