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Meeting	ACGS Committee Meeting 99 - Boulder - March 2007
Agenda Location	4 GENERAL COMMITTEE TECHNICAL SESSION 4.1 Research Institutions, Industry, and University Reports 4.1.1 Research Institutes and Companies 4.1.1.1 Barron Associates
Title	Barron Associates
Presenter	David Ward
Available Downloads*	presentation
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Abstract	Barron Associates, Inc. reported on a number of recent and ongoing controls projects, including: • Adaptive Control of Morphing Aircraft: Adaptive control is being applied to aircraft with changing wing shapes to ensure stability and performance during wing morphing. Work is proceeding toward closed-loop wind-tunnel experiments. • UAV Upset Recovery Control System: Reinforcement-learning-based path planning and control are being developed to prevent and recover from UAV upset conditions. Of particular interest are shipboard landing applications. Phase II will conclude with flight tests using NASA AirSTAR (GTM) testbed. • Innovative Methods for Mixing a Diverse Suite of Control Effectors for Marine Vehicles: Nonlinear inner-loop, control allocation, and path planning algorithms are being developed for marine vehicles with effectors that have vastly different time constants. • Damage Adaptation using Integrated Structural, Propulsion, and Aerodynamic Control: Integrating diagnostics (including structural diagnostics) into adaptive control to ensure operation is stable and stays in a safe envelope in the presence of effector, structural, and propulsion failures. • Integrated, Adaptive, Guidance & Control: o Current AFRL BAA with Boeing is looking at reentry portions of flight. o Current AFRL BAA with NGC is looking at launch and ascent portions of flight – including launch abort and return-to-base. o Current AFRL SBIR is looking at leveraging rapid trajectory planning approaches for fast RLV mission planning. • Adaptive Control of Synthetic Jet Arrays with Unknown Nonlinearities: Virtually shape airfoil at low angles of attack and control flow separation at high angles of attack. Work is proceeding toward wind-tunnel demonstrations. • Generic Software Wrappers for Runtime V&V: Software wrappers monitor safety-critical systems and handle switching to reversionary modes when the software or algorithm fails. Follow-on work includes: o Wrappers for triplex systems o Development of additional monitor blocks o Automatic generation of monitor bounds o Bounds estimation for Neural Networks. • Real-Time Estimation of Stability Margins • Automatic Updating of Simulation Databases: Barron Associates continues to develop system identification and modeling tools to update and/or encode simulation databases. Currently, these methods are being applied to F/A-22 & F-35 engine inlet modeling and F-119 engine model calibration.