High power actuators in intelligent rotor application

Document Type

Conference Proceeding

Publication Date

9-8-1993

Abstract

© 1993 SPIE. All rights reserved. In this paper the use of Terfenol-D magnetostrictive rods for actuation of an intelligent rotor is being addressed. The challenge in the use of these actuators in intelligent rotor applications is housing them in the structure of the rotor. The packaging of the Terfenol rod actuators, considered in this work, inside the structure of the rotor blade is based on lining the actuators inside the spar along the axis of the blade. This is possible due to the fact that most blades have a hollow D or box spar. The two ends of each actuator is sandwiched between two plates which, for flapwise actuation of the spar, are attached to the top and bottom of the spar, alternatively. This arrangement translate the actuator force to two point moments on the blade, at the plate locations. In a numerical study a robust controller using mu-synthesis was designed for a rotating 5M aluminum cantilever beam having a box cross-section. Dimensions of the box is similar to a typical spar. The beam, rotating at 280 RPM, was equipped with only two actuators (providing point moment actuations) and was subject to two point disturbance forces at the actuator locations. The simulation of the closed-loop system indicated an effective vibration suppression of the beam.

Publication Title

Proceedings of SPIE - The International Society for Optical Engineering

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