Piloted Parameter Identification Flight Test Maneuvers for Closed Loop Modeling of the F-18 High Alpha Research Vehicle (Harv)
Piloted Parameter Identification Flight Test Maneuvers for Closed Loop Modeling of the F-18 High Alpha Research Vehicle (Harv)

Author: National Aeronautics and Space Adm Nasa

Publisher: Independently Published

Published: 2018-10-17

Total Pages: 38

ISBN-13: 9781728873749

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Flight test maneuvers are specified for the F-18 High Alpha Research Vehicle (HARV). The maneuvers were designed for closed loop parameter identification purposes, specifically for longitudinal and lateral linear model parameter estimation at 5, 20, 30, 45, and 60 degrees angle of attack, using the NASA 1A control law. Each maneuver is to be realized by the pilot applying square wave inputs to specific pilot station controls. Maneuver descriptions and complete specifications of the time/amplitude points defining each input are included, along with plots of the input time histories. Morelli, Eugene A. Langley Research Center NAS1-19000; RTOP 505-64-52-01

Flight Test Maneuvers for Closed Loop Lateral-directional Modeling of the F-18 High Alpha Research Vehicle (HARV) Using Forebody Strakes
Flight Test Maneuvers for Closed Loop Lateral-directional Modeling of the F-18 High Alpha Research Vehicle (HARV) Using Forebody Strakes

Author: E. A. Morelli

Publisher:

Published: 1996

Total Pages: 28

ISBN-13:

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Flight test maneuvers are specified for the F-18 High Alpha Research Vehicle (HARV). The maneuvers were designed for closed loop parameter identification purposes, specifically for lateral linear model parameter estimation at 30, 45, and 60 degrees angle of attack, using the Actuated Nose Strakes for Enhanced Rolling (ANSER) control law in Strake (S) model and Strake/Thrust Vectoring (STV) mode. Each maneuver is to be realized by applying square wave inputs to specific pilot station controls using the On-Board Excitation System (OBES). Maneuver descriptions and complete specification of the time/amplitude points defining each input are included, along with plots of the input time histories.

Flight Test Maneuvers for Closed Loop Lateral-Directional Modeling of the F-18 High Alpha Research Vehicle (Harv) Using Forebody Strakes
Flight Test Maneuvers for Closed Loop Lateral-Directional Modeling of the F-18 High Alpha Research Vehicle (Harv) Using Forebody Strakes

Author: National Aeronautics and Space Administration (NASA)

Publisher: Createspace Independent Publishing Platform

Published: 2018-07-03

Total Pages: 28

ISBN-13: 9781722241001

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Flight test maneuvers are specified for the F-18 High Alpha Research Vehicle (HARV). The maneuvers were designed for closed loop parameter identification purposes, specifically for lateral linear model parameter estimation at 30, 45, and 60 degrees angle of attack, using the Actuated Nose Strakes for Enhanced Rolling (ANSER) control law in Strake (S) model and Strake/Thrust Vectoring (STV) mode. Each maneuver is to be realized by applying square wave inputs to specific pilot station controls using the On-Board Excitation System (OBES). Maneuver descriptions and complete specification of the time/amplitude points defining each input are included, along with plots of the input time histories. Morelli, E. A. Langley Research Center NAS1-19000; RTOP 505-64-52-01...

F-18 High Alpha Research Vehicle (Harv) Parameter Identification Flight Test Maneuvers for Optimal Input Design Validation and Lateral Control Effectiveness
F-18 High Alpha Research Vehicle (Harv) Parameter Identification Flight Test Maneuvers for Optimal Input Design Validation and Lateral Control Effectiveness

Author: National Aeronautics and Space Administration (NASA)

Publisher: Createspace Independent Publishing Platform

Published: 2018-07-03

Total Pages: 48

ISBN-13: 9781722226800

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Flight test maneuvers are specified for the F-18 High Alpha Research Vehicle (HARV). The maneuvers were designed for open loop parameter identification purposes, specifically for optimal input design validation at 5 degrees angle of attack, identification of individual strake effectiveness at 40 and 50 degrees angle of attack, and study of lateral dynamics and lateral control effectiveness at 40 and 50 degrees angle of attack. Each maneuver is to be realized by applying square wave inputs to specific control effectors using the On-Board Excitation System (OBES). Maneuver descriptions and complete specifications of the time/amplitude points define each input are included, along with plots of the input time histories. Morelli, Eugene A. Unspecified Center NAS1-19000; RTOP 505-64-52-01...

The F-18 High Alpha Research Vehicle (HARV) Parameter Identification Flight Test Maneuvers for Optimal Input Design Validation and Lateral Control
The F-18 High Alpha Research Vehicle (HARV) Parameter Identification Flight Test Maneuvers for Optimal Input Design Validation and Lateral Control

Author: Eugene A. Morelli

Publisher:

Published: 1995

Total Pages: 54

ISBN-13:

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Flight tests maneuvers are specified for the F-18 Alpha Research Vehicle (HARV). The maneuvers were designed for open loop parameter identification purposes, specifically for optimal input design validation at 5 degrees angle of attack, identification of individual strake effectiveness at 40 and 50 degrees angle of attack, and study of lateral dynamics and lateral control effectiveness at 40 and 50 degrees angle of attack. Each maneuver is to be realized by applying square wave inputs to specific control effectors using the On-Board Excitation System (OBES). Maneuver descriptions and complete specifications of the time/amplitude points defining each input are included, along with plots of the input time histories.

An Overview of Controls and Flying Qualities Technology on the F/a-18 High Alpha Research Vehicle
An Overview of Controls and Flying Qualities Technology on the F/a-18 High Alpha Research Vehicle

Author: National Aeronautics and Space Administration (NASA)

Publisher: Createspace Independent Publishing Platform

Published: 2018-06-30

Total Pages: 28

ISBN-13: 9781722079314

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The NASA F/A-18 High Alpha Research Vehicle (HARV) has been the flight test bed of a focused technology effort to significantly increase maneuvering capability at high angles of attack. Development and flight test of control law design methodologies, handling qualities metrics, performance guidelines, and flight evaluation maneuvers are described. The HARV has been modified to include two research control effectors, thrust vectoring, and actuated forebody strakes in order to provide increased control power at high angles of attack. A research flight control system has been used to provide a flexible, easily modified capability for high-angle-of-attack research controls. Different control law design techniques have been implemented and flight-tested, including eigenstructure assignment, variable gain output feedback, pseudo controls, and model-following. Extensive piloted simulation has been used to develop nonlinear performance guide-lines and handling qualities criteria for high angles of attack. This paper reviews the development and evaluation of technologies useful for high-angle-of-attack control. Design, development, and flight test of the research flight control system, control laws, flying qualities specifications, and flight test maneuvers are described. Flight test results are used to illustrate some of the lessons learned during flight test and handling qualities evaluations. Pahle, Joseph W. and Wichman, Keith D. and Foster, John V. and Bundick, W. Thomas Armstrong Flight Research Center; Langley Research Center ...