REAL TIME HELICOPTER BLADE ELEMENT TAIL ROTOR AND INTERFERENCE MODELS

Award Information
Agency:
Department of Defense
Branch
Navy
Amount:
$499,111.00
Award Year:
1992
Program:
SBIR
Phase:
Phase II
Contract:
n/a
Agency Tracking Number:
15373
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
Advanced Rotorcraft Technology
1804 N Shoreline Blvd Ste, Mountain View, CA, 94043
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Hossein Saberi
Principal Investigator
(415) 968-1464
Business Contact:
() -
Research Institution:
n/a
Abstract
SINGLE ROTOR HELICOPTERS HAVE OFTEN ENCOUNTERED AN UNANTICIPATED RIGHT YAW (URY). THIS OCCURS PREDOMINANTLY AT LOW SPEED IN GROUND EFFECT WITH THE RELATIVE WIND FROM THE LEFT OR REAR. THIS APPEARS TO BE CAUSED BY AERODYNAMIC INTERFERENCE PHENOMENA THAT CAN ONLY BE ANALYTICALLY MODELED BY A FREE VORTEX WAKE MODEL WITH GROUND EFFECT. ART HAS DEVELOPED SUCH A MODEL AND WILL INCORPORATE IT IN FLIGHTLAB, A SOFTWARE ENVIRONMENT DEVELOPED BY ART FOR SIMULATION PROTOTYPING AND PARALLEL PROCESSING. A FLIGHTLAB BASED ROTORCRAFT SIMULATION WITH BLADE ELEMENT AND TAIL ROTORS WILL THEN BE COUPLED TO THIS VORTEX WAKE MODELAND THE RESULTS WILL BE VALIDATED AGAINST WIND TUNNEL DATA FOR VARIOUS WIND DIRECTIONS AND VELOCITIES. ONCE VALIDATED, THE MODEL WILL BE IMPLEMENTED IN REAL TIME USING PARALLEL PROCESSING. A FINITE STATE DYNAMIC INFLOW REPRESENTATION OF THE VORTEX WAKE MODEL WILL BE USED INTHE REAL TIME IMPLEMENTATION TO REDUCE COMPUTATION. PILOTED EVALUATIONS WILL BE CONDUCTED ON A SIMULATOR OF THE NAVY-S CHOICE, DRIVEN BYA FLIGHTLAB SYSTEM. THE RESULTING SIMULATION CAN BE USED TO IMPROVEDESIGNS AND PILOTING TECHNIQUES TO MINIMIZE THE URY PROBLEM. SOURCECODE GENERATED BY FLIGHTLAB CAN BE USED TO PORT THE M FIELDED TRAINERS FOR ENHANCED TRAINING SUPPORT.

* information listed above is at the time of submission.

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