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Author : Irving L. Ashkenas,Duane T. McRuer
Publisher : Unknown
Page : 234 pages
File Size : 53,5 Mb
Release : 1958
Category : Aeroelasticity
ISBN : UOM:39015095267301
Author : Anonim
Publisher : Unknown
Page : 62 pages
File Size : 40,7 Mb
Release : 1963
Category : Aeroelasticity
ISBN : UOM:39015095304054
pt.3: The dynamic coupling of rigid and elastic degrees of freedom of an airplane are described by two methods. In the first, coupling is described by the changes in airframe characteristic equation roots caused by the introduction of coupling terms to the equations of motion. The second method employs modal response coefficients to compare the relative amplitudes of rigid and elastic degrees of freedom at each coupled mode frequency. Simple literal expressions are obtained for each of these descriptors and physical interpretations given. Time vector diagrams are also used to show the major parameters affecting coupling. (Author).
Author : Duane T. McRuer,Dunstan Graham,Irving Ashkenas
Publisher : Princeton University Press
Page : 809 pages
File Size : 45,5 Mb
Release : 2014-07-14
Category : Technology & Engineering
ISBN : 9781400855988
Aeronautical engineers concerned with the analysis of aircraft dynamics and the synthesis of aircraft flight control systems will find an indispensable tool in this analytical treatment of the subject. Approaching these two fields with the conviction that an understanding of either one can illuminate the other, the authors have summarized selected, interconnected techniques that facilitate a high level of insight into the essence of complex systems problems. These techniques are suitable for establishing nominal system designs, for forecasting off-nominal problems, and for diagnosing the root causes of problems that almost inevitably occur in the design process. A complete and self-contained work, the text discusses the early history of aircraft dynamics and control, mathematical models of linear system elements, feedback system analysis, vehicle equations of motion, longitudinal and lateral dynamics, and elementary longitudinal and lateral feedback control. The discussion concludes with such topics as the system design process, inputs and system performance assessment, and multi-loop flight control systems. Originally published in 1974. The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.
Author : Anonim
Publisher : Unknown
Page : 86 pages
File Size : 53,8 Mb
Release : 1963
Category : Aeroelasticity
ISBN : UOM:39015095304062
pt.3: The dynamic coupling of rigid and elastic degrees of freedom of an airplane are described by two methods. In the first, coupling is described by the changes in airframe characteristic equation roots caused by the introduction of coupling terms to the equations of motion. The second method employs modal response coefficients to compare the relative amplitudes of rigid and elastic degrees of freedom at each coupled mode frequency. Simple literal expressions are obtained for each of these descriptors and physical interpretations given. Time vector diagrams are also used to show the major parameters affecting coupling. (Author).
Author : Edward Seckel
Publisher : Academic Press
Page : 523 pages
File Size : 43,8 Mb
Release : 2014-05-10
Category : Technology & Engineering
ISBN : 9781483220154
Stability and Control of Airplanes and Helicopters deals with aircraft flying qualities that determine the stability and control of airplanes and helicopters. It includes problems based on real aircraft, selected to represent the gamut from simple to complicated, and from conventional utility designs to futuristic research types. Many of these problems involve comparison of theory and experiment to demonstrate their mutual relationship. Comprised of 25 chapters, this book begins with a discussion on the aerodynamics of the component parts related to the lift and moment characteristics of an airplane, including wings and associated accessories; bodies such as fuselages, nacelles, and tip tanks; and control surfaces. The reader is then introduced to some mathematical techniques for linear differential equations; steady flight at different speeds; and stick force and control-free stability. Subsequent chapters focus on flaps and high-lift devices; power and compressibility effects; and the manner in which the aircraft responds to the application of control. Aeroelasticity and longitudinal equations of motion are also examined. This monograph is intended for undergraduate and graduate students taking modern engineering courses.
Author : Systems Technology, Inc
Publisher : Unknown
Page : 234 pages
File Size : 40,8 Mb
Release : 1967
Category : Airplanes
ISBN : UOM:39015095329069
This report presents the results of analytical studies of a variety of handling quality topics related to advanced manned aircraft.
Author : R. L. Stapleford
Publisher : Unknown
Page : 174 pages
File Size : 45,7 Mb
Release : 1965
Category : Airplanes
ISBN : UOM:39015095310135
The hover analysis considers pilot attitude and position control tasks in the presence of horizontal gusts. The effects of each of the stability derivatives on the difficulty of the control tasks and on the closed-loop gust responses are determined. It is clearly shown that the handling qualities studies of control sensitivity and angular damping must consider the influences of M sub u (or L sub v) and should include gust inputs. These conclusions are substantiated by previous variable-stability-helicopter experiments. The effects of vehicle size and geometry are investigated by several approaches. The key result of increasing size is found to be a reduction in M sub u and L sub v which can, in turn, lower the requirements for control power and damping. The handling qualities during transition of two vehicles, a tilt duct and a tilt wing, which were previously tested on a simulator are analyzed. It is shown that both trim control and perturbations about the trim conditions must be considered. In fact, part of the increased difficulty in landing transitions, in comparison with takeoff transitions, is due to more difficult trim control; the much more stringent position control requirements in landing are also a contributing factor.
Author : Robert C. Nelson
Publisher : Unknown
Page : 144 pages
File Size : 48,6 Mb
Release : 1974
Category : Aerodynamics
ISBN : UOM:39015095318583
The investigation deals with the dynamic behavior of an airplane encountering aircraft wake turbulence. A digital computer simulation was developed to study the response of an aircraft flying into a trailing vortex wake. The simulation includes the complete six degree of freedom equations of motion, a description of the vortex velocity field, unsteady aerodynamics, and pilot control input. The parameters included the penetration angle, separation distance, aircraft size, and pilot control input. Predicted vortex induced motions are presented for general aviation, business, and light jet transport type aircraft.
Author : Anonim
Publisher : Unknown
Page : 438 pages
File Size : 44,5 Mb
Release : 1966
Category : Airplanes
ISBN : CORNELL:31924004468835
Author : Kenneth J. Szalai
Publisher : Unknown
Page : 52 pages
File Size : 43,8 Mb
Release : 1967
Category : Feedback control systems
ISBN : UIUC:30112106869867
Author : Malcolm J. Abzug,E. Eugene Larrabee
Publisher : Cambridge University Press
Page : 417 pages
File Size : 41,5 Mb
Release : 2002-09-23
Category : Technology & Engineering
ISBN : 9781107320192
From the early machines to today's sophisticated aircraft, stability and control have always been crucial considerations. In this second edition, Abzug and Larrabee again forge through the history of aviation technologies to present an informal history of the personalities and the events, the art and the science of airplane stability and control. The book includes never-before-available impressions of those active in the field, from pre-Wright brothers airplane and glider builders through to contemporary aircraft designers. Arranged thematically, the book deals with early developments, research centers, the effects of power on stability and control, the discovery of inertial coupling, the challenge of stealth aerodynamics, a look toward the future, and much more. It is profusely illustrated with photographs and figures, and includes brief biographies of noted stability and control figures along with a core bibliography. Professionals, students, and aviation enthusiasts alike will appreciate this readable history of airplane stability and control.
Author : Anonim
Publisher : Unknown
Page : 696 pages
File Size : 45,9 Mb
Release : 1972
Category : Electronic
ISBN : MINN:319510008464192
Author : NASA-University Conference on Manual Control
Publisher : Unknown
Page : 438 pages
File Size : 42,5 Mb
Release : 1966
Category : Airplanes
ISBN : UOM:39015047376663
Author : Anonim
Publisher : Unknown
Page : 134 pages
File Size : 49,6 Mb
Release : 1964
Category : Science
ISBN : UOM:39015086566448
Author : Roger H. Hoh,David G. Mitchell,Irving L. Ashkenas,Richard H. Klein,Robert K. Heffley,John Hodgkinson
Publisher : Unknown
Page : 902 pages
File Size : 44,6 Mb
Release : 1982
Category : Airplanes
ISBN : UOM:39015095307420
