Active External Store Flutter Suppression in the YF-17 Flutter Model

A single activated trailing-edge (T.E.) control system (spanning 1% of each wing) is applied to the YF-17 flutter model with the object of suppressing the external store flutter of three different store configurations. The control law is derived by the use of the aerodynamic energy concept and its gains are maintained constant for all three configurations. The results obtained show that the activated T.E. control system leads to very significant increases in the flutter dynamic pressures (QDF) of all three configurations; these increases range between 160240% increase in QDF* These increases in QDF are maintained over a very wide range of flight altitudes and flight velocities.

[1]  E. Cwach,et al.  Suppression of Flutter on Interfering Lifting Surfaces by the Use of Active Controls. , 1974 .

[2]  Glenn O. Thompson,et al.  Active Flutter Suppression - An Emerging Technology , 1972 .

[3]  Kenneth L. Roger,et al.  Active Flutter Suppression—A Flight Test Demonstration , 1975 .

[4]  W. J. Rohling.  Flying qualities - An integral part of a stability augmentation system , 1969 .

[5]  E. Nissim,et al.  Application of the aerodynamic energy concept to flutter suppression and gust alleviation by use of active controls , 1976 .

[6]  E. Nissim,et al.  Active Flutter Suppression Using Trailing-Edge and Tab Control Surfaces , 1975 .

[7]  E. Nissim,et al.  Comparative Study Between Two Different Active Flutter Suppression Systems , 1978 .

[8]  L. T. Redd,et al.  A wind-tunnel investigation of a B-52 model flutter suppression system , 1974 .

[9]  E. Nissim,et al.  Flutter suppression using active controls based on the concept of aerodynamic energy , 1971 .

[10]  E. Kordes.  Influence of structural dynamics on vehicle design - Government view. [of aerospace vehicles] , 1977 .

[11]  David L. Gray,et al.  Transonic Study of Active Flutter Suppression Based on an Energy Concept , 1975 .

[12]  L. J. Topp,et al.  Potential performance gains by use of a flutter suppression system , 1971 .

[13]  E. Nissim,et al.  Recent advances in aerodynamic energy concept for flutter suppression and gust alleviation using active controls , 1977 .

[14]  E. Nissim,et al.  Development and application of an optimization procedure for flutter suppression using the aerodynamic energy concept , 1978 .

[15]  K. L. Roger,et al.  Evaluation of B-52 structural response to random turbulence with stability augmentation systems. , 1967 .

[16]  J. I. Arnold,et al.  Flight test evaluation of an advanced stability augmentation system for B-52 aircraft. , 1969 .

[17]  I. Abel,et al.  Synthesis of active controls for flutter suppression on a flight research wing , 1977 .

[18]  John W. Edwards,et al.  Active Flutter Control Using Generalized Unsteady Aerodynamic Theory , 1978 .

[19]  John H. Wykes,et al.  TECHNIQUES AND RESULTS OF AN ANALYTICAL INVESTIGATION INTO CONTROLLING THE STRUCTURAL MODES OF FLEXIBLE AIRCRAFT , 1965 .