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Meeting	ACGS Committee Meeting 116 - Charlotte, NC - October 2015
Agenda Location	9 SUBCOMMITTEE A – AERONAUTIC AND SURFACE VEHICLES 9.3 L1 Adaptive Control Flight Test
Title	L1 Adaptive Control Flight Test
Presenter	Chris Cotting
Affiliation	USAF Test Pilot School
Available Downloads*	presentation
	Downloads are available to members who are logged in and either Active* or attended this meeting.
Abstract	In the spring of 2015 the USAF Test Pilot School evaluated a L1 Adaptive controller on board a Calspan owned Learjet 25D with a Variable Stabilty Simulator system installed. Over a series of 10, two hour flight test sorties, the L1 Adaptive controller was evaluated at Edwards Air Force Base, CA in a collaborative effort including USAF TPS students and UIUC graduate students and faculty. This talk presents the results of the flying and handling qualities assessment of Calspan¹s variable stability Learjet aircraft augmented with an L1 adaptive flight control law. The variable stability capability of the aircraft was used to alter its apparent dynamics while in flight, allowing the validation of the L1 flight control law against a set of off-nominal aircraft configurations, some of them with aggressive tendencies to adverse pilot-aircraft interaction. All of these off-nominal configurations were employed without the control law¹s knowledge with no fault detection and isolation methods. The results demonstrated that the L1 flight control law was able to significantly restore the flying qualities of a baseline Learjet model, and also recover consistent and safe handling qualities. The evaluation also included a series of straight-in landings with two different aircraft configurations.