This paper reviews the status of smart structures technology development for application to
rotorcraft systems. Though a large component of research is focused on the minimization of …

The paper reviews recent achievements in the application of smart-materials actuation to
counteract aeroelastic and vibration effects in helicopters and fixed wing aircraft. A brief …

Dynamic characteristics of active twist rotor (ATR) blades are investigated analytically and
experimentally in this paper. The ATR system is intended for vibration and potentially for …

For all rotational machines, the analysis of dynamic stresses and the resulting vibrations is
an important subject. When it comes to helicopters and piston engines, this analysis …

This paper reviews the status of smart structures technology development for application to
rotorcraft systems. Though a large component of research is focused to the minimization of …

This paper presents the wind tunnel testing of a four-bladed Mach-scaled rotor model with
piezoelectric bender actuated trailing-edge flaps. Correctly phased, this flap motion can be …

A hybrid design method, focused on reducing vibration while minimizing control effort, is
developed. In this integrated acrive‐passive approach, trailing edge flap controller design is …

The development and testing of a new actuator for helicopter rotor control, the Double X-
Frame, is described. The actuator is being developed for wind tunnel and flight testing on an …

Active integral twist control for vibration reduction of helicopter rotors during forward flight is
investigated. The twist deformation is obtained using embedded anisotropic piezocomposite …

The results of preliminary tests on an active helicopter rotor blade are presented. The blade,
a Mach-scaled model of a CH-47D helicopter blade, has a discrete piezoelectric actuator …