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Meeting	ACGS Committee Meeting 99 - Boulder - March 2007
Agenda Location	4 GENERAL COMMITTEE TECHNICAL SESSION 4.2 Government Agencies Summary Reports 4.2.2 NASA 4.2.2.1 Dryden Flight Research Center
Title	Dryden Flight Research Center
Presenter	John Bosworth
Available Downloads*	presentation
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Abstract	NASA Dryden Flight Research Center continues to contribute to research through flight evaluation projects. The F-18 Autonomous Airborne Refueling (AARD) project showed improved results due to the work of the Sierra-Nevada Corporation. The more robust algorithms provided successful probe and drogue refueling hookups in 2 of 3 attempts with 100% miss recognition. Refueling with automatic rendezvous was also demonstrated. The Ikhana project is preparing for research flights this summer with pilot training and software verification and validation. The F-15 Quiet Spike program has finished testing. Flights to Mach 1.8 and in-flight shock propagation measurements were taken. Despite predictions of no margin in ground structural mode interaction testing, the flight vehicle exhibited no adverse aeroservoelastic interactions. The F-15 Intelligent Flight Control System (IFCS) project is preparing for more flights. Larger simulated destabilization failures will be tested. Data will be collected for developing asymmetric handling qualities metrics by deliberately cross coupling the pitch and roll behavior using fixed weight neural networks. Data analysis from the early 2006 flights has provided a better understanding of the Pilot Induced Oscillations (PIOs) that resulted from the simulated stabilator failures. Improvements to the neural network are being worked to provide better adaptation for these failures. Flight testing has begun on the C-20 precision autopilot system. The goal is for this system to fly for up to 200 km within a 10 meter tube for repeated observations using a Synthetic Aperture Radar (SAR). The subscale blended wing body X-48 vehicle has completed low speed taxi testing and is scheduled for first flight this summer. Reports from these and other efforts at NASA Dryden Flight Research Center will continue to contribute to knowledge through flight discovery.