曝光台 注意防骗
网曝天猫店富美金盛家居专营店坑蒙拐骗欺诈消费者
of compensators.
Chapter 6 discusses airplane response and methods of closed-loop control of the
airplane. The longitudinal and lateral-directional stability and response to various
control inputs are discussed. Also discussed briefiy are the concept of handling
qualities, design of various longitudinal and Iateral-directional stability augmen-
tation systems, and autopilots to meet the desired level of handling qualities.
The problems of inertial coupling and airplane spin are discussed in Chapter
7. These are the typical examples of fiight conditions where the longitudinal and
Iateral-directional motions ofFthe airplane are coupled due to inefflaFterms in the
equations of motion. The discussion includes the basic principles of inertia cou-
pling, divergence in pitch or yaw, and methods of preventing inertia coupling.
The discussion on spinning motion includes kinematics of spin, steady-state spin,
reco'very, and metho~s ofimproving spin resistance.
The problems of stability and control at high angles of attack are discussed in
Chapter- 8. The discussion is focused on the rugh angle-of-attack aerodynamics
of slender fuselages and delta wings, which are characteristic of modern com-
bat aircraft. The discussion includes phenomena such as wing rock caused by
wings and slender forebodies, methods of suppressing wing rock, directional di-
vergencddeparture, roll reversal, and modern concepts of forebody fiow control
and thrust vectoring.
Effortis made to present a number ofsolved examples toillustrate the theory and
basic principles. Also, several exercise problems are included to help the reader
develop problem-solving skills. It is hoped that this text wiU be useful to the
students of aerospace engineering and serve as a useful reference to the practicing
aerospace engineer.
Iwould like to express my sincere thanks to several ofmy friends and colleagues
whose help was of crucial importance in the preparation of the material presented
in this text. First, I am extremely thankful to all my students, who have actually
taught me this subject.l am grateful to Prof. Colin P. Britcher and Dr. Atul Kelk~
for reviewing various parts of the manuscript and making helpful suggestions.
I greatly appreciate the discussions I had at various times with Walt England,
Richard Powell, Dr. Eric Queen, Dr. Suresh Josbi, Dr. D. M. Rao, Fred Lalman,
and H. Paul Stough. I am thanldul to Dr. Sudhir Mehrotra for providing me with
the facilities to work on this project and to Charles Eldred and Larry Rowell for
their support and encouragement to bring this project to a successful completion.
I appreciate the help of Dr. K. Sudhakar in the preparation of the manuscript.l am
also thankful to John Aguire for his help with computers.
I am especially grateful to my wife, whose constant love, affection, and untiring
support has sustained me all the time during this project.lcannot thank her enough
for her patience to put up with me on countless weeknights, weekends, and holidays
when I was working on tlus book. I am deeply indebted to my son and daught"9rJ
whose love and affection have given me the inspiration to work on this text.
I certainly owe a sense of gratitude to various authors on this subject,including
C. D. Perkins, R. E. Hage, B. Etkins, A. W. Babister, B. W. McCornuck, Angelo
Miele, R. C. Blakelock, and many others whose works have made a significant
contribution to this subject and have been useful to me in the preparation of che
material presented in this text.
Finally, I would like to record my appreciation to AIAA for publishing this
as an AIAA textbook. The help and encouragement of all t,he editorial staff of
AIAA and in particular that of Rodger Williams and John Calderone is gratefully
acknowledged.
Bandu N. Pamadi
July 1998
1
Review of Basic Aerodynamic Principles
1.1 Introduction
The performance, stability, and control character:istics of an airplane depend on
the aero+dynamic forces and moments acting on it that,in tum,'depend on the shape
and size of the body, the attitude of the body relative to the airstream, the density p
and viscosity y of the air, velocity of the body Voo, and the speed of sound a in air.
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：
动力机械和机身手册1(7)
