Flutter analysis for wing section with leading and trailing edge surfaces

This paper focuses on two-dimensional wing section with leading and trailing edge surfaces.Flutter of a multi-input/multi-output systems is studied.A method to build the state-space model of aeroservoelastic systems is developed based upon linear fractional transformation.The whole aeroservoelastic system is modeled considering uncertainties of unsteady aerodynamic loads,non-linear structural stiffness and variable structure damping,then the model of the close-loop system is constructed by assembling the LFT blocks of the subsystems,the structured singular value is used to analyze robust stability according to the μ method.The results show that the wing with leading and trailing surfaces can effectively control flutter and increase the flutter speed by 34.96%.