“…They obtained the model by invoking Jones' exponential approximation of Wagner's indicial loading function and Laplace transform of the airload expressions. Also, through an alternative integro-differential scheme [12], York [13] developed another state-space model of the same airfoil-aileron configuration, requiring subsequent corrections which have been recently discussed by Mozaffari-Jovin et al [14,15]. Many scholars have adopted these two state-space models for linear and nonlinear flutter analyses as well as in the design of active control systems for flutter suppression and atmospheric turbulence alleviation.…”