Author: National Aeronautics and Space Adm Nasa
Publisher:
ISBN: 9781730773204
Category :
Languages : en
Pages : 72
Book Description
This report contains a description of a lateral-directional control law designed for the NASA High-Alpha Research Vehicle (HARV). The HARV is a F/A-18 aircraft modified to include a research flight computer, spin chute, and thrust-vectoring in the pitch and yaw axes. Two separate design tools, CRAFT and Pseudo Controls, were integrated to synthesize the lateral-directional control law. This report contains a description of the lateral-directional control law, analyses, and nonlinear simulation (batch and piloted) results. Linear analysis results include closed-loop eigenvalues, stability margins, robustness to changes in various plant parameters, and servo-elastic frequency responses. Step time responses from nonlinear batch simulation are presented and compared to design guidelines. Piloted simulation task scenarios, task guidelines, and pilot subjective ratings for the various maneuvers are discussed. Linear analysis shows that the control law meets the stability margin guidelines and is robust to stability and control parameter changes. Nonlinear batch simulation analysis shows the control law exhibits good performance and meets most of the design guidelines over the entire range of angle-of-attack. This control law (designated NASA-1A) was flight tested during the Summer of 1994 at NASA Dryden Flight Research Center. Davidson, John B. and Murphy, Patrick C. and Lallman, Frederick J. and Hoffler, Keith D. and Bacon, Barton J. Langley Research Center...
High-Alpha Research Vehicle Lateral-Directional Control Law Description, Analyses, and Simulation Results
Author: National Aeronautics and Space Adm Nasa
Publisher:
ISBN: 9781730773204
Category :
Languages : en
Pages : 72
Book Description
This report contains a description of a lateral-directional control law designed for the NASA High-Alpha Research Vehicle (HARV). The HARV is a F/A-18 aircraft modified to include a research flight computer, spin chute, and thrust-vectoring in the pitch and yaw axes. Two separate design tools, CRAFT and Pseudo Controls, were integrated to synthesize the lateral-directional control law. This report contains a description of the lateral-directional control law, analyses, and nonlinear simulation (batch and piloted) results. Linear analysis results include closed-loop eigenvalues, stability margins, robustness to changes in various plant parameters, and servo-elastic frequency responses. Step time responses from nonlinear batch simulation are presented and compared to design guidelines. Piloted simulation task scenarios, task guidelines, and pilot subjective ratings for the various maneuvers are discussed. Linear analysis shows that the control law meets the stability margin guidelines and is robust to stability and control parameter changes. Nonlinear batch simulation analysis shows the control law exhibits good performance and meets most of the design guidelines over the entire range of angle-of-attack. This control law (designated NASA-1A) was flight tested during the Summer of 1994 at NASA Dryden Flight Research Center. Davidson, John B. and Murphy, Patrick C. and Lallman, Frederick J. and Hoffler, Keith D. and Bacon, Barton J. Langley Research Center...
Publisher:
ISBN: 9781730773204
Category :
Languages : en
Pages : 72
Book Description
This report contains a description of a lateral-directional control law designed for the NASA High-Alpha Research Vehicle (HARV). The HARV is a F/A-18 aircraft modified to include a research flight computer, spin chute, and thrust-vectoring in the pitch and yaw axes. Two separate design tools, CRAFT and Pseudo Controls, were integrated to synthesize the lateral-directional control law. This report contains a description of the lateral-directional control law, analyses, and nonlinear simulation (batch and piloted) results. Linear analysis results include closed-loop eigenvalues, stability margins, robustness to changes in various plant parameters, and servo-elastic frequency responses. Step time responses from nonlinear batch simulation are presented and compared to design guidelines. Piloted simulation task scenarios, task guidelines, and pilot subjective ratings for the various maneuvers are discussed. Linear analysis shows that the control law meets the stability margin guidelines and is robust to stability and control parameter changes. Nonlinear batch simulation analysis shows the control law exhibits good performance and meets most of the design guidelines over the entire range of angle-of-attack. This control law (designated NASA-1A) was flight tested during the Summer of 1994 at NASA Dryden Flight Research Center. Davidson, John B. and Murphy, Patrick C. and Lallman, Frederick J. and Hoffler, Keith D. and Bacon, Barton J. Langley Research Center...
High-Alpha Research Vehicle Lateral-Directional Control Law Description, Analyses, and Simulation Results
Author: John B. Davidson
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 74
Book Description
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 74
Book Description
A Control Law Design Method Facilitating Control Power, Robustness, Agility, and Flying Qualities Tradeoffs: CRAFT
Flight-Determined, Subsonic, Lateral-Directional Stability and Control Derivatives of the Thrust-Vectoring F-18 High Angle of Attack Research Vehicle (HARV), and Comparisons to the Basic F-18 and Predicted Derivatives
Author: Kenneth W. Iliff
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 92
Book Description
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 92
Book Description
A Method for Integrating Thrust-Vectoring and Actuated Forebody Strakes with Conventional Aerodynamic Controls on a High-Performance Fighter Airplane
Author: Frederick J. Lallman
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 48
Book Description
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 48
Book Description
Monthly Catalog of United States Government Publications
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 768
Book Description
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 768
Book Description