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Meeting	ACGS Committee Meeting 109 - Salt Lake City - March 2012
Agenda Location	5 GENERAL COMMITTEE TECHNICAL SESSION 5.1 Government Agencies Summary Reports 5.1.1 DoD 5.1.1.2 AFRL
Title	AFRL
Presenter	Dave Doman
Available Downloads*	presentation video
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Abstract	Government Agencies Summary Report: Air Force Research Laboratory – Control Science Center of Excellence, David Doman The Control Science Center of Excellence at the Air Force Research Laboratory is focused on control related research in three areas: autonomous control unmanned air vehicles, hypersonic vehicle dynamics and control, and flapping wing micro air vehicle flight control. Research addresses a highly autonomous UAV that isolates an intruder in a field of Unattended Ground Sensors (UGS) without the need for high bandwidth streaming video to an operator, or dependence on sophisticated and frequently unreliable onboard target detection and classification. The UAV team has also developed a state aggregation based restricted linear programming method to construct suboptimal policies for the perimeter patrol stochastic optimal control problem. A new effort to quantify energy extraction from wind gradients for fixed wing aircraft has begun within the past six months. A major objective is to compute trajectories that maximize energy extraction from the wind. In the area of micro air vehicle control, a method for controlling a tailless flapping wing micro air vehicle that enables four degree-of-freedom insect-like maneuverability to be achieved using only two physical actuators was developed in the past few years. The method works by independently varying the stroke-plane velocities of passively rotating wings, such that commanded cycle-averaged forces and moments can be produced. Custom control software was developed to drive brushless DC motors in a split-cycle fashion. This software was executed on an embedded controller development system with a PIC24 microcontroller. The motor controller effectively produced a rocker trajectory tracking system and used motor shaft encoder and hall-effect sensor feedback to provide direct measurement of position and to provide pulse width modulated block commutation of the motor. A surface mount discrete component implementation of the controller is currently being produced and will support an air table based test of the split cycle concept. In the area of hypersonic vehicle control, the group is focusing on the development of adaptive control methods that incorporate state constraints, which must be satisfied in order to avoid scramjet engine unstart. In the area of verification and validation we are working to develop techniques for verifying correctness of human-automation generated mission plans. To date, we have developed a formal framework that models the execution of mission plans as a transition system and mission specifications as Linear Temporal Logic formulae. This framework has been used in the development of a multi-UAV VIP escort scenario that is suitable for human-in-the-loop testing.