Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 20
Book Description
An Empirical Correction Method for Improving Off-Axes Response Prediction in Component Type Flight Mechanics Helicopter Models
Author: An Empirical Correction Method for Improving Off-Axes Response Prediction in Component Type Flight Mechanics Helicopter Models
Author: National Aeronautics and Space Administration (NASA)Publisher: Createspace Independent Publishing Platform
ISBN: 9781725094963
Category :
Languages : en
Pages : 32
Book Description
Historically, component-type flight mechanics simulation models of helicopters have been unable to satisfactorily predict the roll response to pitch stick input and the pitch response to roll stick input off-axes responses. In the study presented here, simple first-order low-pass filtering of the elemental lift and drag forces was considered as a means of improving the correlation. The method was applied to a blade-element model of the AH-64 APache, and responses of the modified model were compared with flight data in hover and forward flight. Results indicate that significant improvement in the off-axes responses can be achieved in hover. In forward flight, however, the best correlation in the longitudinal and lateral off-axes responses required different values of the filter time constant for each axis. A compromise value was selected and was shown to result in good overall improvement in the off-axes responses. The paper describes both the method and the model used for its implementation, and presents results obtained at hover and in forward flight. Mansur, M. Hossein and Tischler, Mark B. Ames Research Center NASA-TM-110406, NAS 1.15:110406, USAATCOM-96-A-010, A-961022 RTOP 505-59-36...
Journal of the American Helicopter Society
Author: American Helicopter SocietyPublisher:
ISBN:
Category : Helicopters
Languages : en
Pages : 628
Book Description
Atmospheric Flight Mechanics Conference Held August, 1997 at New Orleans, Louisiana
Author: American Institute of Aeronautics and AstronauticsPublisher: AIAA (American Institute of Aeronautics & Astronautics)
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 838
Book Description
This volume is the proceedings of the Atmospheric Flight Mechanics Conference, which took place in New Orleans, August 1997. It focuses on the technical progress, issues and challenges associated with atmospheric flight. Technical papers address stability and control, flying qualities (including one session dedicated to pilot-induced oscillations), unsteady and vortex aerodynamics, system and parameter identification, aircraft flight dynamic re-entry and aero assist technologies, and reusable launch vehicles.
Applied Mechanics Reviews
Author: AGARD Index of Publications
Author: North Atlantic Treaty Organization. Advisory Group for Aerospace Research and DevelopmentPublisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 614
Book Description
International Aerospace Abstracts
Author: Introduction to Aircraft Flight Mechanics
Author: Thomas R. YechoutPublisher: AIAA
ISBN: 9781600860782
Category : Aerodynamics
Languages : en
Pages : 666
Book Description
Based on a 15-year successful approach to teaching aircraft flight mechanics at the US Air Force Academy, this text explains the concepts and derivations of equations for aircraft flight mechanics. It covers aircraft performance, static stability, aircraft dynamics stability and feedback control.
Scientific and Technical Aerospace Reports
Author: Flight Stability and Automatic Control
Author: Robert C. NelsonPublisher:
ISBN:
Category : History
Languages : en
Pages : 464
Book Description
This edition of this this flight stability and controls guide features an unintimidating math level, full coverage of terminology, and expanded discussions of classical to modern control theory and autopilot designs. Extensive examples, problems, and historical notes, make this concise book a vital addition to the engineer's library.