SAE Aerospace Control and Guidance Committee Meeting No

SAE Aerospace Control and Guidance Committee Meeting No. 96 Hilton Head SC Oct. 19 -21, 2005 Ron Hess Dept. of Mechanical and Aeronautical Engineering University of California Davis, CA

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

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

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

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

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

A simplified approach for modeling pilot pursuit control behavior in multi-loop flight tasks .

A simplified approach for modeling pilot pursuit control behavior in multi-loop flight tasks Hover repositioning task UCE = 1 . UCE = 3

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.

Certification and design issues for rudder control systems in transport aircraft Rudder Pedal Force/Feel System Characteristics

Certification and design issues for rudder control systems in transport aircraft Pilot modeling results System A highly nonlinear force/feel System B more linear force/feel AIAA Paper No. 2005 -6035, AIAA Atmospheric Flight Mechanics Conference and Exhibit, San Francisco, CA 15 -18 August, 2005

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

Nonlinear inversion control for a ducted fan UAV CONDUIT used for outer-loop design

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

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