Passive Tailboom Vibration Control Using Fluidic Flexible Matrix Composite (F2MC) Tubes

2014 ◽  
Author(s):  
Kentaro Miura ◽  
Christopher Rahn ◽  
Edward Smith
Keyword(s):  
Vibration Control ◽  
Matrix Composite ◽  
Flexible Matrix Composite

Coupled and Multimode Tailboom Vibration Control Using Fluidic Flexible Matrix Composite Tubes

2019 ◽  
Vol 64 (4) ◽  
pp. 1-10
Author(s):  
Matthew J. Krott ◽  
Edward C. Smith ◽  
Christopher D. Rahn
Keyword(s):  
Vibration Control ◽  
Matrix Composite ◽  
Structural Model ◽  
Vibration Absorber ◽  
Vibration Modes ◽  
Lateral Bending ◽  
Vertical Mode ◽  
Torsion Mode ◽  
Vertical Vibrations ◽  
Flexible Matrix Composite

This paper covers the modeling and testing of a helicopter tailboom integrated with a fluidic flexible matrix composite (F2MC) damped vibration absorber. In an advance over previous work, the F2MC absorber presented in this paper treats a combination of tailboom lateral, torsional, and vertical vibrations. A finite element structural model of a laboratory-scale tailboom is combined with a model of attached F2MC tubes and a tuned fluidic circuit. Vibration reductions of over 75% in a coupled 26.8-Hz lateral bending/torsion tailboom mode are predicted by the model and measured experimentally. These results demonstrate that F2MC vibration control is viable at higher frequencies and for more complex vibration modes than previous research had explored. A new absorber with a fluidic circuit that targets two tailboom vibration modes is designed and experimentally tested. On the lab-scale tailboom testbed, the absorber with this circuit is shown to provide vibration reductions of over 60% in both a 12.2-Hz vertical mode and a 26.8-Hz lateral bending/torsion mode. Using this new absorber, vertical and lateral/torsion mode damping are achieved with almost no added weight relative to a purely vertical absorber.

scholarly journals Hydrogel core flexible matrix composite (H-FMC) actuators: theory and preliminary modelling

2014 ◽  
Vol 23 (9) ◽  
pp. 095021 ◽  
Author(s):  
M P M Dicker ◽  
P M Weaver ◽  
J M Rossiter ◽  
I P Bond
Keyword(s):  
Matrix Composite ◽  
Flexible Matrix Composite

Fluidic flexible matrix composite damping treatment for a cantilever beam

2015 ◽  
Vol 340 ◽  
pp. 80-94 ◽  
Author(s):  
Bin Zhu ◽  
Christopher D. Rahn ◽  
Charles E. Bakis
Keyword(s):  
Cantilever Beam ◽  
Matrix Composite ◽  
Flexible Matrix Composite

Active Vibration Control of Epoxy Matrix Composite Beams with Embedded Shape Memory Alloy TiNi Fibers

2003 ◽  
Vol 17 (08n09) ◽  
pp. 1744-1749 ◽  
Author(s):  
T. Aoki ◽  
A. Shimamoto
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Vibration Control ◽  
Matrix Composite ◽  
Epoxy Matrix ◽  
Damping Ratio ◽  
Active Vibration Control ◽  
Composite Beams ◽  
Epoxy Matrix Composite ◽  
Active Vibration

In this paper, epoxy matrix composite beams with embedded TiNi (SMA: Shape Memory Alloy) fiber are applied to enhance the strength and fracture toughness of the machinery components. It is also well known that SMA shows the remarkable changes of stiffness and damping ratio between martensite at lower temperature and austenite at high temperature. A shape recovery force is associated with inverse phase transformation of SMA. The effects of heating with current and pre-strain in TiNi fiber of SMA on vibration characteristics are experimentally investigated. The active vibration control is achieved by controlling the current and pre-strain.

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