The problem of vibration has limited the use of helicopters in both civil and military
applications. In this research, further analysis has been performed for the various on-blade …

Different concepts to damp structural vibrations of the vertical tail of fighter aircraft are
reported. The various requirements for a vertical tail bias an integrated approach for the …

The basic concepts and some innovative ideas associated with the analysis, design, and
experimentation of induced-strain actuators for rotor blade aeroelastic vibration control are …

This report presents a general method of unsteady thin airfoil theory for analytically
determining the aerodynamic characteristics of deforming camberlines. This method …

Recent development of a smart structures module and its successful integration with a
multidisciplinary design optimization software ASTROS* and an Aeroservoelasticity (ASE) …

This paper presents an advanced servo flap rotor using variable blade index angle control
(VBIAC) combined with optimally designed servo flaps to achieve high performance in hover …

Recent development of a smart structures module and its successful integration with a
multidisciplinary design optimization software ASTROS* and an Aeroservoelasticity (ASE) …

Active aeroelastic wing concepts, sometimes also called active flexible wing concepts, have
been investigated for several years to improve aircraft performance and stability. Two …

This paper examines the influence of negative work on energy required for the flap** wing
flight of birds, or other flap** wing animals or vehicles. Because negative energy is …

Aircraft are adaptable structures, once moving and off the ground they are constantly
adjusting to the airstream, the system frequencies and dam** vary with equivalent …