High Fidelity Helicopter Lag Damper Model for Comprehensive Rotor Analysis

Award Information
Agency:
Department of Defense
Branch
n/a
Amount:
$499,939.00
Award Year:
2013
Program:
STTR
Phase:
Phase II
Contract:
N68335-13-C-0094
Award Id:
n/a
Agency Tracking Number:
N11A-010-0329
Solicitation Year:
2011
Solicitation Topic Code:
N11A-T010
Solicitation Number:
2011.A
Small Business Information
11750 Beltsville Drive, 3rd Floor, Beltsville, MD, -
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
061997029
Principal Investigator:
GrumNgatu
Principal Investigator
(240) 790-0708
grum@technosci.com
Business Contact:
SandraSelha
Contracts Administrator
(240) 790-0620
selhas@technosci.com
Research Institute:
University of Maryland
Norman Werley
3181 Martin Hall
Collge Park, MD, 20741-
(301) 405-1927

Abstract
The primary goal of this STTR program is to develop high fidelity LDLP software module that can predict stiffness and damping forces over the ranges of amplitude, frequency, and temperature appropriate for comprehensive modeling of helicopters. The LDLP module will focus on enabling accurate prediction of the onset of both air and ground resonance, as well as the fatigue loads that would arise due to the implementation of such lag dampers, and the impact of fatigue on the Remaining Useful Life (RUL) of rotor and rotor hub components. This project will develop a software module that provides the capability to predict lag damper behavior, especially the stiffness and damping forces that arise from lag dampers of varying configuration, material choices, fluid properties, and feedback control strategies in the case of semi-active or active lag damper technologies. The project team will construct an LDLP software module that will be configured to interface with any existing comprehensive rotorcraft analysis code, such as the University of Maryland Advanced rotorcraft Code (UMARC), Copter (Bell"s comprehensive rotor code), CAMRAD II (Comprehensive Analytical Model of Rotorcraft Aerodynamics and Dynamics), and GenHel (Sikorsky"s General Helicopter Flight Dynamic Simulation Model).

* information listed above is at the time of submission.

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