Canard
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Canard Cycles
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Author : Peter De Maesschalck
language : en
Publisher: Springer Nature
Release Date : 2021-08-07
Canard Cycles written by Peter De Maesschalck and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-08-07 with Mathematics categories.
This book offers the first systematic account of canard cycles, an intriguing phenomenon in the study of ordinary differential equations. The canard cycles are treated in the general context of slow-fast families of two-dimensional vector fields. The central question of controlling the limit cycles is addressed in detail and strong results are presented with complete proofs. In particular, the book provides a detailed study of the structure of the transitions near the critical set of non-isolated singularities. This leads to precise results on the limit cycles and their bifurcations, including the so-called canard phenomenon and canard explosion. The book also provides a solid basis for the use of asymptotic techniques. It gives a clear understanding of notions like inner and outer solutions, describing their relation and precise structure. The first part of the book provides a thorough introduction to slow-fast systems, suitable for graduate students. The second and third parts will be of interest to both pure mathematicians working on theoretical questions such as Hilbert's 16th problem, as well as to a wide range of applied mathematicians looking for a detailed understanding of two-scale models found in electrical circuits, population dynamics, ecological models, cellular (FitzHugh–Nagumo) models, epidemiological models, chemical reactions, mechanical oscillators with friction, climate models, and many other models with tipping points.
Mon Canard
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Author : Stephen Rodefer
language : en
Publisher: Geoffrey Young
Release Date : 2000
Mon Canard written by Stephen Rodefer and has been published by Geoffrey Young this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Poetry categories.
Poetry. If the word Rodefer doesn't derive from the Low Dutch Classicist in the Rathskellar, perhaps it oughta. MON CANARD is typically ducky and elaborately free of flotation devices - a split atom of Ashberium with fey and heady valence squirrelling in jumpy and Catullan arcs - Tim Davis. Stephen Rodefer and his writing are, as we say in French, a force of nature - Pierre Alferi. Phoneme sex, indeed . . . give me a break Rodefer, this book makes me jealous - Jennifer Moxley. What makes this work co captivating is Rodefer's ability to orchestrate the most eclectic range of tones and discourses . . . A major poet - Maud Ellman. Among Stephen Rodefer's many books, PASSING DURATION, WRITING OUT OF CHARACTER and EMERGENCY MEASURES are still available from SPD.
Numerical Investigation Of Aerodynamics Of Canard Controlled Missile Using Planar And Grid Tail Fins
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Author : James DeSpirito
language : en
Publisher:
Release Date : 2004
Numerical Investigation Of Aerodynamics Of Canard Controlled Missile Using Planar And Grid Tail Fins written by James DeSpirito and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Computational fluid dynamics categories.
Viscous computational fluid dynamic simulations were used to predict the aerodynamic coefficients and flow field around a canard-controlled missile in subsonic and transonic flow. Computations were performed at Mach 0.6 and 0.9, six angles of attack between 0 deg and 10 deg, and with planar and grid tail fins. The computations were validated with wind tunnel data. Flow visualizations showed that the canard downwash produced a low-pressure region on the starboard side of the missile that produced a large induced side force. The canard trailing vortices interacted with the tail fins until alpha> 8 deg, producing a pressure differential on the leeward tail fin, leading to the adverse induced roll effects. Visualizations of the flow through the grid fin structure showed choking of the flow at Mach 0.9 and Mach 1.5. The validated simulations results showed that grid fins did not improve the canard roll-control effectiveness at subsonic and transonic speeds as well as they did at the low supersonic speed.
Canard Cycles And Center Manifolds
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Author : Freddy Dumortier
language : en
Publisher: American Mathematical Soc.
Release Date : 1996
Canard Cycles And Center Manifolds written by Freddy Dumortier and has been published by American Mathematical Soc. this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Mathematics categories.
In this book, the ``canard phenomenon'' occurring in Van der Pol's equation $\epsilon \ddot x+(x^2+x)\dot x+x-a=0$ is studied. For sufficiently small $\epsilon >0$ and for decreasing $a$, the limit cycle created in a Hopf bifurcation at $a = 0$ stays of ``small size'' for a while before it very rapidly changes to ``big size'', representing the typical relaxation oscillation. The authors give a geometric explanation and proof of this phenomenon using foliations by center manifolds and blow-up of unfoldings as essential techniques. The method is general enough to be useful in the study of other singular perturbation problems.
Effects Of Canard Planform And Wing Leading Edge Modification On Low Speed Longitudinal Aerodynamic Characteristics Of A Canard Airplane Configuration
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Author : Bernard Spencer
language : en
Publisher:
Release Date : 1961
Effects Of Canard Planform And Wing Leading Edge Modification On Low Speed Longitudinal Aerodynamic Characteristics Of A Canard Airplane Configuration written by Bernard Spencer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1961 with Aerodynamics categories.
An investigation has been conducted at low subsonic speeds to study the effects of canard planform and wing-leading-edge modification on the longitudinal aerodynamic characteristics of a general research canard airplane configuration. The basic wing of the model had a trapezoidal planform, an aspect ratio of 3.0, a taper ratio of 0.143, and an unswept 80-percent-chord line. Modifications to the wing included addition of full-span and partial-span leading-edge chord-extensions. Two canard planforms were employed in the study one was a 60° sweptback delta planform and the other was a trapezoidal planform similar to that of the basic wing. Modifications to these canards included addition of a full-span leading-edge chord-extension to the trapezoidal planform and a fence to the delta planform. For the basic-wing-trapezoidal-canard configuration, rather abrupt increases in stability occurred at about 12° angle of attack. A slight pitch-up tendency occurred for the delta-canard configuration at approximately 8° angle of attack. A comparison of the longitudinal control effectiveness for the basic-wing-trapezoidal-canard combination and for the basic-wing-delta-canard combination indicates higher values of control effectiveness at low angles of attack for the trapezoidal canard. The control effectiveness for the delta-canard configuration, however, is seen to hold up for higher canard deflections and to higher angles of attack. Use of a full-span chord-extension deflected approximately 30° on the trapezoidal canard greatly improved the control characteristics of this configuration and enabled a sizeable increase in trim lift to be realized.
Static Longitudinal Aerodynamic Characteristics Of Close Coupled Wing Canard Configurations At Mach Numbers From 1 60 To 2 86
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Author : Samuel M. Dollyhigh
language : en
Publisher:
Release Date : 1971
Static Longitudinal Aerodynamic Characteristics Of Close Coupled Wing Canard Configurations At Mach Numbers From 1 60 To 2 86 written by Samuel M. Dollyhigh and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1971 with Aerodynamics categories.
An experimental investigation was made in the Mach number range from 1.60 to 2.86 to determine the static longitudinal aerodynamic characteristics of close-coupled wing-canard configurations. Three canards, ranging in exposed planform area from 17.5 to 30.0 percent of the wing reference area, were employed in this investigation. The canards were either located in the plane of the wing or in a position 18.5 percent of the wing mean geometric chord above the wing plane. Most data obtained were for a model with a 60 deg leading-edge-sweep wing; however, a small amount of data were obtained for a 44 deg leading-edge-sweep wing. The model utilized two balances to isolate interference effects between wing and canard. In general, it was determined that at angle of attack for all configurations investigated with the canard in the plane of the wing an unfavorable interference exists which causes the additional lift on the canard generated by a canard deflection to be lost on the wing due to an increased downwash at the wing from the canard. Further, this interference decreased somewhat with increasing Mach number. Raising the canard above the plane of the wing also greatly decreased the interference of the canard deflection on the wing lift. However, at Mach 2.86 the presence of the canard in the high position had a greater unfavorable interference effect at high angles of attack than the canard in the wing plane. This interference resulted in the in-plane canard having better trimmed performance at Mach 2.86 for the same center-of-gravity location.
Interference Effects Of Canard Controls On The Longitudinal Aerodynamic Characteristics Of A Winged Body At Mach 10
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Author : Cuyler W. Brooks (Jr.)
language : en
Publisher:
Release Date : 1968
Interference Effects Of Canard Controls On The Longitudinal Aerodynamic Characteristics Of A Winged Body At Mach 10 written by Cuyler W. Brooks (Jr.) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with Airplanes categories.
Canard A Revolution In Flight Commemorative Edition Military Civilian Homebuilt
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Author : Andy Lennon
language : en
Publisher: Markowski International Publishers
Release Date : 2021-05-05
Canard A Revolution In Flight Commemorative Edition Military Civilian Homebuilt written by Andy Lennon and has been published by Markowski International Publishers this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-05-05 with Technology & Engineering categories.
DISCOVER THE EXCITEMENT OF CANARDS! "Now, Andy Lennon has provided us with an excellent history of the canard and tandem-wing airplanes. We have, for the first time in a single source, descriptions and photos of the tail-first aircraft from the Wright Flyer to the Starship I. The text also details the specific flying qualities exhibited by many of the aircraft. To the aviation enthusiast and pilot, the book will provide interesting and sometimes fascinating accounts of how the various shapes handled in the air.... The designer will find the book useful in highlighting many of the problems inherent in tandem-wing design." -From the Foreword by Burt Rutan.IN THIS COMMEMORATIVE EDITION you'll learn how and why canards were developed, and how they evolved into some of the most beautiful aircraft in history. SOME OF THE ABSORBING TOPICS FEATURED INCLUDE: -The historical significance and design evolution of the canard concept. - Why properly designed canards won't stall or spin. - Basic canard aerodynamics, performance characteristics, and handling qualities. - Over 200 drawings, inboard profiles, cutaways, and photos. -A review of proposed homebuilt and general aviation designs. - The amazing maneuverability of canard jet fighters. SOME OF THE AIRCRAFT DESCRIBED INCLUDE... The Wright brothers' designs and how the canard saved them from serious accidents - The outstanding designs of Burt Rutan, originator of modern canards - The Quickie Series - The Dragonfly - The COZY - Ultralight Canards - Secret German Experimentals - The Russian Utka - Details are also presented for General Aviation canards, including: The Beech Starship I - The Avtek-400 - OMAC-1 - The Gates-Piaggio GP-180, and many other exciting canards from around the world. CANARD--A REVOLUTION IN FLIGHT gives you "the-story-behind-the-story" of this intriguing aspect of flight. Whether you're thinking of building your own airplane, or simply want to become more knowledgeable of the qualities of these unique aircraft, this book could prove to be quite helpful to you. Or if you simply want to learn about the engrossing historical technological development of canards, and the role they have played in aviation, this book is for you.
Un Canard New York Contenu Enrichi
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Author : Connie Kaldor
language : fr
Publisher: La Montagne secrète
Release Date : 2013-02-25T00:00:00-05:00
Un Canard New York Contenu Enrichi written by Connie Kaldor and has been published by La Montagne secrète this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-02-25T00:00:00-05:00 with Juvenile Fiction categories.
Contenu enrichi (avec fichiers audio intégrés) Un tout petit canard des prairies rêve de monter sur les planches à Broadway pour présenter sa jolie danse Couac Couac. Malgré les mises en garde de ses amis, il quitte son étang et avec l’aide de la flamboyante camionneuse Big Betty, le petit canard fait son bonhomme de chemin... Arrivera-t-il à New York ? Un conte pétillant et endiablé qui swingue ! Ce livre enrichi musical propose la narration du conte suivie de deux chansons : « Un canard à New York » et « Couac, couac, couac ».
Static Stability And Control Of Canard Configurations At Mach Numbers From 0 70 To 2 22 Trangular Wing And Canard With Twin Vertical Tails
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Author : Victor L. Peterson
language : en
Publisher:
Release Date : 1961
Static Stability And Control Of Canard Configurations At Mach Numbers From 0 70 To 2 22 Trangular Wing And Canard With Twin Vertical Tails written by Victor L. Peterson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1961 with Aerodynamics categories.