Author: National Aeronautics and Space Adm Nasa
Publisher: Independently Published
ISBN: 9781729460641
Category : Science
Languages : en
Pages : 68
Book Description
An adaptive control method is presented for the minimization of drag during flight for transport aircraft. The minimization of drag is achieved by taking advantage of the redundant control capability available in the pitch axis, with the horizontal tail used as the primary surface and symmetric deflection of the ailerons and cruise flaps used as additional controls. The additional control surfaces are excited with sinusoidal signals, while the altitude and velocity loops are closed with guidance and control laws. A model of the throttle response as a function of the additional control surfaces is formulated and the parameters in the model are estimated from the sensor measurements using a least squares estimation method. The estimated model is used to determine the minimum drag positions of the control surfaces. The method is presented for the optimization of one and two additional control surfaces. The adaptive control method is extended to optimize rate of climb with the throttle fixed. Simulations that include realistic disturbances are presented, as well as the results of a Monte Carlo simulation analysis that shows the effects of changing the disturbance environment and the excitation signal parameters. Jackson, Michael R. and Enns, Dale F. Unspecified Center...
A Concept for Adaptive Performance Optimization on Commercial Transport Aircraft
Author: National Aeronautics and Space Adm Nasa
Publisher: Independently Published
ISBN: 9781729460641
Category : Science
Languages : en
Pages : 68
Book Description
An adaptive control method is presented for the minimization of drag during flight for transport aircraft. The minimization of drag is achieved by taking advantage of the redundant control capability available in the pitch axis, with the horizontal tail used as the primary surface and symmetric deflection of the ailerons and cruise flaps used as additional controls. The additional control surfaces are excited with sinusoidal signals, while the altitude and velocity loops are closed with guidance and control laws. A model of the throttle response as a function of the additional control surfaces is formulated and the parameters in the model are estimated from the sensor measurements using a least squares estimation method. The estimated model is used to determine the minimum drag positions of the control surfaces. The method is presented for the optimization of one and two additional control surfaces. The adaptive control method is extended to optimize rate of climb with the throttle fixed. Simulations that include realistic disturbances are presented, as well as the results of a Monte Carlo simulation analysis that shows the effects of changing the disturbance environment and the excitation signal parameters. Jackson, Michael R. and Enns, Dale F. Unspecified Center...
Publisher: Independently Published
ISBN: 9781729460641
Category : Science
Languages : en
Pages : 68
Book Description
An adaptive control method is presented for the minimization of drag during flight for transport aircraft. The minimization of drag is achieved by taking advantage of the redundant control capability available in the pitch axis, with the horizontal tail used as the primary surface and symmetric deflection of the ailerons and cruise flaps used as additional controls. The additional control surfaces are excited with sinusoidal signals, while the altitude and velocity loops are closed with guidance and control laws. A model of the throttle response as a function of the additional control surfaces is formulated and the parameters in the model are estimated from the sensor measurements using a least squares estimation method. The estimated model is used to determine the minimum drag positions of the control surfaces. The method is presented for the optimization of one and two additional control surfaces. The adaptive control method is extended to optimize rate of climb with the throttle fixed. Simulations that include realistic disturbances are presented, as well as the results of a Monte Carlo simulation analysis that shows the effects of changing the disturbance environment and the excitation signal parameters. Jackson, Michael R. and Enns, Dale F. Unspecified Center...
A Concept for Adaptive Performance Optimization on Commercial Transport Aircraft
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 72
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 72
Book Description
Flight Test of an Adaptive Configuration Optimization System for Transport Aircraft
Author: Glenn B. Gilyard
Publisher:
ISBN:
Category : Ailerons
Languages : en
Pages : 20
Book Description
Publisher:
ISBN:
Category : Ailerons
Languages : en
Pages : 20
Book Description
Development of a Real-time Transport Performance Optimization Methodology
Author: Glenn Gilyard
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 22
Book Description
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 22
Book Description
In-Flight Transport Performance Optimization: An Experimental Flight Research Program and an Operational Scenario
Author: Glenn Gilyard
Publisher:
ISBN:
Category :
Languages : en
Pages : 24
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 24
Book Description
Monthly Catalog of United States Government Publications
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1194
Book Description
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1194
Book Description
Flight Test of an Adaptive Configuration Optimization System for Transport Aircraft
Author: Glenn B. Gilyard
Publisher:
ISBN:
Category : Ailerons
Languages : en
Pages : 12
Book Description
Publisher:
ISBN:
Category : Ailerons
Languages : en
Pages : 12
Book Description
34th Aerospace Sciences Meeting & Exhibit
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 640
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 640
Book Description
Scientific and Technical Aerospace Reports
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 548
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 548
Book Description
Research Opportunities in Advanced Aerospace Concepts
Author:
Publisher: DIANE Publishing
ISBN: 1428996389
Category : Aerodynamics
Languages : en
Pages : 68
Book Description
Publisher: DIANE Publishing
ISBN: 1428996389
Category : Aerodynamics
Languages : en
Pages : 68
Book Description