Abstract:

Three methods used for aeroelastic state-space modeling are discussed in this paper. They are least square (LS) method, minimumstate (MS) method and fit state-space approximation (MA) method. The modeling characters of these methods are analyzed and summarized through two models, according to flutter and response of frequency respectively. In the research of rational function approximation methods (LS and MS methods) on aerodynamic forces, the effects of lag root are highly analyzed.

Key words: aeroelasticity,  , aeroservoelasticity,  , unsteady , aerodynamics,  , flutter,  , state , space , equation