Although helicopter has become a versatile mode of aerial transportation, high vibration
levels leads to poor ride quality for its passengers and aircrew. Undesired vibration …

This paper compares two periodic control methods, the optimal H2 and the periodic static
output feedback (POF), to reduce the helicopter rotor vibrations. Actively twisted blades with …

The current status of Canadian research on rotor-based actively controlled technologies for
helicopters is reviewed in this paper. First, worldwide research in this field is overviewed to …

A novel passive approach for controlling the flow in a 2D dynamic stall at variabl freestream
is investigated. 2D computational fluid dynamics simulations of an SC1095 airfoil with …

Disclosed herein are control systems relating generally to the field of aerodynamics and
more particularly to the control of vibration of rotor blades such as helicopter blades. Such …

In forward flight, helicopter rotor blades function within a highly complex aerodynamic
environment that includes both near-blade and far-blade aerodynamic phenomena. These …

It can be greatly beneficial to remove the swashplate of conventional helicopter, because the
swashplate is usually complicated, aerodynamically resistive, and obstacle of more complex …

A novel passive flow control concept for subsonic and transonic flows over 2D airfoils is
proposed and examined via CFD. The control concept is based on the local modification of …

In this paper, an approach to estimate the dynamic characteristics of a rotating blade using
response data is proposed. A test campaign devoted to demonstrate the capability of the …

This paper evaluates integral actuation concepts and rotor optimisation for the design of
advanced rotor-UAV. Design and optimization of adaptive helicopter rotor blades requires …