International Journal of Engineering and Technology

In a cruising mission, an airplane wing is subject to intense dynamic pressure changes with different magnitudes. The variable pressures exerted on the wing geometry will cause the redundant vibrations by flutter effect. The unkind Aeroelastic instabilities have an influence on the airplane performance and its structural life to a large extend. To overcome the instabilities, (particularly flutter modes) an Active Flutter Suppression (AFS) technique has been proposed during the year of 2002. In this review article, the contributions of different researchers in the field of AFS over the years are investigated. Mathematical models for various control designs provided are capable enough to link the response of wing structures against the oncoming airflow. It includes the structural and fluid dynamic properties required to design an active control to capture the effects of flutter frequency. Mass balancing and stiffness enhancement with control systems are the different methods available to implement AFS. In the critical flutter speed, the non linear characters play a vital role in the view of complex systems design and accuracy. Consequently, with the aid mass balancing, the non linear effects such as Limit Cycle Oscillations (LCO), baggy control system linkages and Internal Resonance are eliminated or reduced. Therefore, for increased airplane performance and efficiency, AFS is a key approach in the field of unconventional aeroelasticity.