1. 1 Hoh Aeronautics, Inc. Research Update David G. Mitchell Technical Director 310-325-7280 dmitchell@hoh-aero.com dmitchell@hoh-aero.com AC&GS Committee Meeting Hilton Head, South Carolina October 2005

2. 2 Development of An Aeronautical Design Standard for Helicopter Simulators Identify thresholds of perception for errors in simulation modelingIdentify thresholds of perception for errors in simulation modeling –Math model –Motion system –Visual system –Feel system Wrapping up initial exploratory simulationsWrapping up initial exploratory simulations –Fixed-base facility, one pilot, one task, simplified helicopter model –Using “Eye Chart” approach for evaluations

3. 3 Unnoticeable Added Dynamics: Ideal Helicopter, Roll Axis, Hover - Compared with MUAD Envelopes

4. 4 How Do We Characterize the Added Dynamics? One method: Assume peaks in magnitude and phase describe the effects of the added dynamicsOne method: Assume peaks in magnitude and phase describe the effects of the added dynamics Example: Magnitude peaks for lead-lag and lag-lead dynamicsExample: Magnitude peaks for lead-lag and lag-lead dynamics

5. 5 There is Much More to be Done Other axes, other tasks, more pilots, more representative helicopter models, variations in motion and visual systemsOther axes, other tasks, more pilots, more representative helicopter models, variations in motion and visual systems NASA Ames Vertical Motion Simulator is best, but too expensiveNASA Ames Vertical Motion Simulator is best, but too expensive Possibly use University of Liverpool simulatorPossibly use University of Liverpool simulator

6. 6 Newest Contract: Research Test Plan for Rudder Control Piloted Simulator Study Sponsoring organization: FAA Atlantic CitySponsoring organization: FAA Atlantic City COTR: Robert McGuireCOTR: Robert McGuire Subcontractor: Test Pilot, Inc. (Paul Desrochers)Subcontractor: Test Pilot, Inc. (Paul Desrochers) Kickoff meeting held 18 OctoberKickoff meeting held 18 October Develop a test plan to examine pedal usage for…Develop a test plan to examine pedal usage for… –Closed-loop operation (for example, crosswinds) –Emergency operation (for example, upset recovery) –Focus on transport airplanes Outcome of AA 587 accident in 2001 (and others)Outcome of AA 587 accident in 2001 (and others) Will result in a detailed test plan for investigation of rudder pedal control usageWill result in a detailed test plan for investigation of rudder pedal control usage