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Author : James R. Mihaloew
Publisher : Unknown
Page : 40 pages
File Size : 45,8 Mb
Release : 1988
Category : Helicopters
ISBN : UIUC:30112106606327
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
Page : 30 pages
File Size : 40,8 Mb
Release : 2018-08-20
Category : Electronic
ISBN : 1722748028
The NASA Ames and Lewis Research Centers, in conjunction with the Army Research and Technology Laboratories have initiated and completed, in part, a joint research program focused on improving the performance, maneuverability, and operating characteristics of rotorcraft by integrating the flight and propulsion controls. The background of the program, its supporting programs, its goals and objectives, and an approach to accomplish them are discussed. Results of the modern control governor design of the T700 and the Rotorcraft Integrated Flight-Propulsion Control Study, which were key elements of the program, are also presented. Mihaloew, James R. and Ballin, Mark G. and Ruttledge, D. G. C. Ames Research Center; Glenn Research Center ...
Author : James F. Stewart
Publisher : Unknown
Page : 32 pages
File Size : 48,9 Mb
Release : 1992
Category : Airplanes
ISBN : UIUC:30112005556664
Author : James F. Stewart
Publisher : Unknown
Page : 32 pages
File Size : 42,8 Mb
Release : 1992
Category : Electronic
ISBN : NASA:31769000521727
Author : James R. Mihaloew
Publisher : Unknown
Page : 40 pages
File Size : 51,9 Mb
Release : 1988
Category : Helicopters
ISBN : NASA:31769000442056
Author : James F. Stewart
Publisher : Unknown
Page : 28 pages
File Size : 40,8 Mb
Release : 1992
Category : Airplanes
ISBN : UIUC:30112005556656
Author : Anonim
Publisher : Unknown
Page : 40 pages
File Size : 41,6 Mb
Release : 1988
Category : Science
ISBN : OSU:32435021763693
Author : Anonim
Publisher : Unknown
Page : 216 pages
File Size : 40,5 Mb
Release : 1983
Category : Aeronautics, Military
ISBN : CORNELL:31924004859843
Author : MB Tischler
Publisher : Routledge
Page : 371 pages
File Size : 41,9 Mb
Release : 2018-04-24
Category : Technology & Engineering
ISBN : 9781351468435
This book provides a single comprehensive resource that reviews many of the current aircraft flight control programmes from the perspective of experienced practitioners directly involved in the projects. Each chapter discusses a specific aircraft flight programme covering the control system design considerations, control law architecture, simulation and analysis, flight test optimization and handling qualities evaluations. The programmes described have widely exploited modern interdisciplinary tools and techniques and the discussions include extensive flight test results. Many important `lessons learned' are included from the experience gained when design methods and requirements were tested and optimized in actual flight demonstration.
Author : Anonim
Publisher : Unknown
Page : 32 pages
File Size : 47,6 Mb
Release : 1990
Category : Electronic
ISBN : NASA:31769000520018
Author : Anonim
Publisher : Unknown
Page : 616 pages
File Size : 51,9 Mb
Release : 1992-07
Category : Aeronautics
ISBN : UFL:31262082066589
Author : National Academies of Sciences, Engineering, and Medicine,Division on Engineering and Physical Sciences,Aeronautics and Space Engineering Board,Committee on Propulsion and Energy Systems to Reduce Commercial Aviation Carbon Emissions
Publisher : National Academies Press
Page : 123 pages
File Size : 47,6 Mb
Release : 2016-08-09
Category : Technology & Engineering
ISBN : 9780309440998
The primary human activities that release carbon dioxide (CO2) into the atmosphere are the combustion of fossil fuels (coal, natural gas, and oil) to generate electricity, the provision of energy for transportation, and as a consequence of some industrial processes. Although aviation CO2 emissions only make up approximately 2.0 to 2.5 percent of total global annual CO2 emissions, research to reduce CO2 emissions is urgent because (1) such reductions may be legislated even as commercial air travel grows, (2) because it takes new technology a long time to propagate into and through the aviation fleet, and (3) because of the ongoing impact of global CO2 emissions. Commercial Aircraft Propulsion and Energy Systems Research develops a national research agenda for reducing CO2 emissions from commercial aviation. This report focuses on propulsion and energy technologies for reducing carbon emissions from large, commercial aircraftâ€" single-aisle and twin-aisle aircraft that carry 100 or more passengersâ€"because such aircraft account for more than 90 percent of global emissions from commercial aircraft. Moreover, while smaller aircraft also emit CO2, they make only a minor contribution to global emissions, and many technologies that reduce CO2 emissions for large aircraft also apply to smaller aircraft. As commercial aviation continues to grow in terms of revenue-passenger miles and cargo ton miles, CO2 emissions are expected to increase. To reduce the contribution of aviation to climate change, it is essential to improve the effectiveness of ongoing efforts to reduce emissions and initiate research into new approaches.
Author : R. A. Carlton,George William Gallops,C. F. Weiss
Publisher : Unknown
Page : 0 pages
File Size : 42,9 Mb
Release : 1990
Category : Airplanes
ISBN : OCLC:1428325710
This paper describes an evaluation of propulsion system requirements and capability for a Short Take-Off/Vertical Landing (STOVL) aircraft employing modulation of the propulsive lift distribution for pitch and roll control in hover. The effects of propulsive lift nozzle configuration and propulsion system dynamic response were evaluated using a combined system simulation consisting of a six degree of freedom aircraft model, engine model, and integrated flight/propulsion control. The response and stability of propulsive lift control are compared with control by reaction jets supplied by engine bleed. Aircraft performance is demonstrated in simulated STOVL maneuvers using a dynamic pilot model. The conclusion of this study is that propulsive lift control of aircraft pitch and roll is feasible and can provide as much as a 10 percent increase in engine lift rating over systems that employ reaction control alone. The dynamic response of practical propulsive lift configurations, however, is less than that of reaction control configurations, which must be offset through integration of the propulsion system and its control.
Author : Anonim
Publisher : Unknown
Page : 180 pages
File Size : 51,5 Mb
Release : 1987
Category : Aeronautics
ISBN : UIUC:30112104414666
Author : R. H. Smith,J. D. Chisholm,J. F. Stewart
Publisher : Unknown
Page : 0 pages
File Size : 48,5 Mb
Release : 1990
Category : Airplanes
ISBN : OCLC:1427203055
An adaptive, integrated flight/propulsion control algorithm called Performance Seeking Control (PSC) has been developed to optimize total aircraft performance during steady-state engine operation. The multimode algorithm will minimize fuel consumption at cruise conditions; maximize excess thrust (thrust minus drag) during aircraft accelerations, climbs, and dashes; and extend engine life by reducing Fan Turbine Inlet Temperature (FTIT) when the extended life mode is engaged. On-board models of the inlet, engine, and nozzle are optimized to compute a set of control trims, which are then applied as increments to the nominal engine and inlet control schedules. The on-board engine model is continually updated to match the operating characteristics of the actual engine cycle through the use of a Kalman filter, which accounts for anomalous engine operation. The PSC algorithm will be flight demonstrated on an F-15 test aircraft under the direction of the NASA Ames/Dryden Flight Research Facility. This paper discusses the PSC design strategy, describes the control algorithm, and presents results from high-fidelity, nonlinear aircraft/engine simulations. Simulation results indicate that thrust increases as high as 15 percent and specific fuel consumption reductions up to 3 percent are realizable by the PSC system.
