Abstract

Computer-aided conventional synthesis techniques are employed to obtain a robust active-flutter-suppression control law. The relatively high dynamic order of such problems are dealt with effectively with a computer-aided approach, while computer graphics allows conventional graphical techniques to be utilized. Key design information is displayed for variations in flight conditions such that a simple control law is obtained that is robust over variations in the flight condition. Through visualization of the pole and zero migration with dynamic pressure, for example, control synthesis, evaluation of effects of unsteady aerodynamics and model reduction were performed almost by inspection. A candidate control law is analytically shown to compare very favorably to several others taken from the literature.

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