Download - SAE Aerospace Control and Guidance Committee Meeting No. 96 Hilton Head SC Oct. 19-21, 2005
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SAE Aerospace Control and Guidance CommitteeMeeting No. 96
Hilton Head SCOct. 19-21, 2005
Ron Hess
Dept. of Mechanical and Aeronautical EngineeringUniversity of California
Davis, CA
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Outline
• A simplified technique for modeling piloted rotorcraft operations near ships
• A simplified approach for modeling pilot pursuit control behavior in multi-loop flight tasks
• Certification and design issues for rudder control systems in transport aircraft
• Nonlinear inversion control for a ducted fan UAV
• Design, construction and testing of a UAV for remote sensing
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A Simplified Technique for Modeling Piloted Rotorcraft Operations Near Ships
Research supported by Phase II SBIR to Robert Heffley Engineering: Pilot Behavioral Modeling for Flight Operations Near Ships; Naval Air Warfare Center, Patuxent River, MD
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A Simplified Technique for Modeling Piloted Rotorcraft Operations Near Ships
• Aircraft shipboard operations, fixed or rotary wing, can be potentially hazardous to personnel in the vehicle and on the flight deck
• Determining suitability of proposed flight control systems for shipboard operations through analysis and computer simulation is an important, if not critical design challenge
• Computational requirements for high-fidelity modeling of the near-ship environment may inhibit its use as a preliminary assessment tool for the flight control/handling qualities engineer
• Simplified approaches to this complex modeling problem may be useful
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A Simplified Technique for Modeling Piloted Rotorcraft Operations Near Ships
• Ship motion from closed-form expressions
• Atmospheric turbulence modeling from scaled METS (Mixer-Equivalent Turbulence Simulation)
• Pilot model selection
• Handling qualities level prediction
• AIAA Paper No. 2005-6030, AIAA Atmospheric Flight Mechanics Conference and Exhibit, San Francisco, CA 15-18 August, 2005
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A simplified approach for modeling pilot pursuit control behavior in multi-loop flight tasks
Research supported by Phase II SBIR to Robert Heffley Engineering: Pilot Behavioral Modeling for Flight Operations Near Ships; Naval Air Warfare Center, Patuxent River, MD
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A simplified approach for modeling pilot pursuit control behavior in multi-loop flight tasks
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A simplified approach for modeling pilot pursuit control behavior in multi-loop flight tasks
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Hover repositioning task UCE = 1 UCE = 3
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Certification and design issues for rudder control systems in transport aircraft
Research Supported by: FAA Hughes Research Center; Certification Standards for Transport Aircraft
From NTSB recommendations regarding AA 587 accident
• Modify FAR Part 25 standards to include a certification standard that will ensure safe handing qualities in the yaw axis throughout the flight envelope, including limits for rudder pedal sensitivity.
• After certification standard established, review designs of existing airplanes to determine if they meet the standard…determine if the airplanes would be adequately protected from the adverse effects of potential aircraft-pilot coupling (APC) after rudder inputs at all airspeeds.
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Certification and design issues for rudder control systems in transport aircraft
Rudder Pedal Force/Feel System Characteristics
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Certification and design issues for rudder control systems in transport aircraft
Pilot modeling results
System A System B
highly nonlinear force/feel more linear force/feel
AIAA Paper No. 2005-6035, AIAA Atmospheric Flight Mechanics Conference and Exhibit, San Francisco, CA 15-18 August, 2005
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Nonlinear inversion control for a ducted fan UAV
Research Supported by: Army Aeroflightdyamamics Directorate, NASA Ames; MS Student: Christina Spaulding (MS 2005)
NASA lead researchers: Dr. Mark Tischler, Mohammadreza Mansur, Dr. Jack Franklin
Nonlinear aero model of 29 inch diameter UAV
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Nonlinear inversion control for a ducted fan UAV
CONDUIT used for outer-loop design
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Nonlinear inversion control for a ducted fan UAV
Velocity command-following performance
AIAA Paper No. 2005-6231, AIAA Atmospheric Flight Mechanics Conference and Exhibit, San Francisco, CA 15-18 August, 2005
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Design, construction and testing of a UAV for remote sensing
Research Supported by: University of California, California Space Institute (Two year grant)
• Participants: J. J. Chattot (Team Lead)
R. Davis (Propulsion)
M. Hafez (Aerodynamics)
R. Hess (Guidance and Control)
S. Joshi (Guidance and Control)
V. La Saponara (Structures)
C. van Dam (Aerodynamics/Performance)
• Design just getting underway