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Meeting	ACGS Committee Meeting 114 - Cleveland, Ohio - October 2014
Agenda Location	7 SUBCOMMITTEE A – AERONAUTIC AND SURFACE VEHICLES 7.1 Optimal Control Allocation with Load Sensor Feedback for Active Load Suppression on an F/A-18
Title	Optimal Control Allocation with Load Sensor Feedback for Active Load Suppression on an F/A-18
Presenter	Chris Miller
Affiliation	NASA Armstrong Research Center
Available Downloads*	presentation
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Abstract	The problem of control command and maneuver induced structural loads is an important aspect of any control system design. Designers must design the aircraft structure and the control architecture to achieve desired piloted control responses while limiting the imparted structural loads. The classical approach is to build the structure with high margins, restrict control surface commands to known good combinations, and train pilots to follow procedural maneuvering limitations. With recent advances in structural sensing and the continued desire to improve safety and vehicle fuel efficiency, it is both possible and desirable to develop control architectures that enable lighter vehicle weights while maintaining and improving protection against structural damage. An optimal technique has been researched which has been shown to achieve desirable vehicle control performance while limiting sensed structural loads to specified values. This technique has been implemented and flown on NASA’s Full Scale Advanced Systems testbed F/A-18 aircraft. The flight tests illustrate that the approach achieves the desired performance and shows promising potential benefits. The flights also uncovered some important issues that will need to be addressed for a production application.