High Fidelity Helicopter Lag Damper Model for Comprehensive Rotor Analysis

Award Information
Agency:
Department of Defense
Branch
Navy
Amount:
$79,999.00
Award Year:
2011
Program:
STTR
Phase:
Phase I
Contract:
N68335-11-C-0419
Award Id:
n/a
Agency Tracking Number:
N11A-010-0367
Solicitation Year:
2011
Solicitation Topic Code:
N11A-T010
Solicitation Number:
2011.A
Small Business Information
57 MARYANNE DRIVE, MONROE, CT, -
Hubzone Owned:
N
Minority Owned:
Y
Woman Owned:
N
Duns:
180516577
Principal Investigator:
SerkanOzbay
Research Engineer
(203) 874-3100
sozbay@AboutMTC.com
Business Contact:
YogeshMehrotra
Vice President
(203) 874-3100
YMehrotra@AboutMTC.com
Research Institute:
Georgia Institute of Technology
Dewey Hodges
270 Ferst Drive
Atlanta, GA, 30332-0150
(404) 894-8201

Abstract
Helicopters with articulated rotor blades are subject to the well-known ground resonance where the rotor lag mode interacts, in an unstable fashion, with fuselage roll. To eliminate this ground resonance, both lag dampers and fuselage roll dampers are required. The Sikorsky UH-60 helicopter platform, which comprises the vast majority of utility rotorcraft used by the US Army and the Navy, relies upon a set of four hydraulic dampers for safe operation. The current comprehensive rotorcraft analysis tools however lack accurate modeling capabilities to predict the force, displacement, and dissipative nature of lag dampers. The methodologies used in these current comprehensive tools usually oversimplify the complexity of the dampers and incorporate significant assumptions about the operational environments and system parameters. To address the NAVAIR need for designing fluidic lag dampers, Materials Technologies Corporation (MTC) and its team members, Georgia Tech and Sikorsky Aircraft Corporation, propose creating a robust fully nonlinear modeling approach that inherently employs first principles of mechanics. Once developed, our tool will be coupled with a comprehensive rotorcraft simulation code enabling a quick, versatile and accurate construction of the fluid based (hydraulic and fluid-elastomeric) dampers for rotorcraft analysis.

* information listed above is at the time of submission.

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