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Meeting	ACGS Committee Meeting 121 - Tucson, AZ - April 2018
Agenda Location	6 SUBCOMMITTEE D – Dynamics, Computations, and Analysis 6.1 Development of a Full Flight Envelope F–16 VISTA Simulation Model from Closed–loop
Title	Development of a Full Flight Envelope F–16 VISTA Simulation Model from Closed–loop
Presenter	Marit Knapp
Affiliation	San Jose State University with ADD, Moffett Field, CA
Available Downloads*	presentation
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Abstract	A full ﬂight envelope bare-airframe model of the Calspan NF-16D Variable-stability In-ﬂight Simulator Test Aircraft (VISTA) was identiﬁed from ﬂight data. The unstable nature of the aircraft required the control system to be engaged during ﬂight and resulted in highly correlated control surface measurements. To identify a bare-airframe state-space model of the aircraft from ﬂight data with the control system engaged (closed-loop), the Joint Input/Output method was used to post-process frequency responses. A series of discrete point models and trim data were used to develop the full ﬂight envelope model using a “stitched” model architecture. Employing a scaling method enabled the stitched model to extrapolate to various loading conﬁgurations. This paper describes the identiﬁcation methodology of the models with the control system engaged, the development ofthe stitched model, and validation of the full ﬂight envelope simulation model to ﬂight data.