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Elementary Flight Dynamics with an Introduction to Bifurcation and Continuation Methods





ISBN 9781439886021
Published October 26, 2013 by CRC Press
376 Pages 185 B/W Illustrations

 
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Book Description

Many textbooks are unable to step outside the classroom and connect with industrial practice, and most describe difficult-to-rationalize ad hoc derivations of the modal parameters. In contrast, Elementary Flight Dynamics with an Introduction to Bifurcation and Continuation Methods uses an optimal mix of physical insight and mathematical presentation to lead students to the heart of professional aircraft flight dynamics in a pleasant and informative manner.

Presenting an updated version of the aerodynamic model with the corrected definition of the rate (dynamic) derivatives, the book is peppered with examples of real-life airplanes, real airplane data, and solved examples. It plunges directly into the core concepts of aircraft flight dynamics with minimal mathematical fuss. When the 6-degree-of-freedom equations are presented in the final chapter, the students are already familiar with most of the physical concepts and the math is easier to absorb.

Aimed at junior and senior undergraduate students, this book covers recent developments in airplane flight dynamics and introduces bifurcation and continuation methods as a tool for flight dynamic analysis. Designed to help students make the transition from classroom calculations to the real-world of computational flight dynamics, it offers a practical perspective, enhanced by the inclusion of an open source computational tool.

Table of Contents

Introduction
What, Why and How?
Aircraft as a Rigid Body
Six Degrees of Freedom
Position, Velocity and Angles
Aircraft Motion in Wind
Longitudinal Flight Dynamics
Longitudinal Dynamics Equations
A Question of Timescales
Longitudinal Trim
Aerodynamic Coefficients CD, CL, Cm
Wing–Body Trim

Stability Concept
Linear First-Order System
Linear Second-Order System
Nonlinear Second-Order System
Pitch Dynamics about Level Flight Trim
Modelling Small-Perturbation Aerodynamics
Pitch Dynamics about Level Flight Trim (Contd.)
Short-Period Frequency and Damping
Forced Response
Response to Pitch Control

Longitudinal Trim and Stability
Wing–Body Trim and Stability
Wing–Body Plus Tail: Physical Arguments
Wing–Body Plus Tail: Math Model
Role of Downwash
Neutral Point
Replacing VH with VH /
Effect of CG Movement
Rear CG Limit due to Airplane Loading and Configuration at Take-Off
Cm, CL Curves—Non-Linearities

Longitudinal Control
All-Moving Tail
Elevator
Tail Lift with Elevator
Airplane Lift Coefficient with Elevator
Airplane Pitching Moment Coefficient with Elevator
Elevator Influence on Trim and Stability
Longitudinal Manoeuvres with the Elevator
Most Forward CG Limit
NP Determination from Flight Tests
Effect of NP Shift with Mach Number

Long-Period (Phugoid) Dynamics
Phugoid Mode Equations
Energy
Phugoid Mode Physics
Phugoid Small-Perturbation Equations
Aerodynamic Modelling with Mach Number
Phugoid Dynamics
Phugoid Mode Frequency and Damping
Accurate Short-Period and Phugoid Approximations
Derivative CmMa
Derivative Cmq1 in Pitching Motion
Derivative Cmq1 in Phugoid Motion
Flow Curvature Effects

Lateral-Directional Motion
Review
Directional Disturbance Angles
Directional versus Longitudinal Flight
Lateral Disturbance Angles
Lateral-Directional Rate Variables
Small-Perturbation Lateral-Directional Equations
Lateral-Directional Timescales
Lateral-Directional Aerodynamic Derivatives
Lateral-Directional Small-Perturbation Equations (Contd.)........ 202
Lateral-Directional Dynamics Modes

Lateral-Directional Dynamic Modes
Roll (Rate) Mode
Roll Damping Derivative Clp2
Roll Control
Aileron Control Derivative, Clδa
Yaw due to Roll Control
Aileron Input for a Bank Angle
Dutch Roll Mode
Directional Derivatives CYβ and Cnβ
Lateral Derivative: Clβ
Damping Derivatives: Cnr1 and Clr1
Rudder Control
Spiral Mode
Real-Life Airplane Data

Computational Flight Dynamics
Aircraft Equations of Motion
Derivation of Aircraft Equations of Motion
3–2–1 Rule
Derivation of Aircraft Equations of Motion (Contd.)
Numerical Analysis of Aircraft Motions
Standard Bifurcation Analysis
Extended Bifurcation Analysis

...
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Featured Author Profiles

Author - N.  Ananthkrishnan
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N. Ananthkrishnan

Independent Consultant, Self
Mumbai

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Author - Nandan Kumar Sinha
Author

Nandan Kumar Sinha

Professor of Aerospace Engineering, Indian Institute of Technology (IIT) Madras
Chennai, Tamilnadu, India

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Reviews

"Flight dynamics is a topic that can cause difficulties to aerospace engineering students. This text leads the reader gently through the material with plenty of practical examples and student exercises. As such, it is easy to follow the material and to gradually develop a deep understanding of a demanding topic. The book is ideal for undergraduate students and is a good text for graduate students."
––James F Whidborne, Cranfield University, United Kingdom

"This textbook is written by two experienced university lecturers who, after ascertaining the views of their students on the most difficult aspects of this challenging subject, optimised the order in which these are taught and presented here. The book covers all the aspects of flight dynamics traditionally found in such texts interspersed with examples of the treatment of features of current air vehicles. ... In my opinion, this book covers the subject comprehensively and is a desirable reference source for undergraduates and graduates alike."
––R. J. Poole, MRAeS, The Aeronautical Journal

"The authors ... are well-known and respected professionals in teaching and research, especially in the areas of flight dynamics, stability and control, nonlinear dynamics and bifurcation methods. ... The book design and the methodology of interpretation are directed to a wide range of target audience/population interested in studying the dynamics of flight. Bachelor students can use it as recommended reading. For master and doctoral students, it is not only basic study material for particular problems of flight dynamics, but it also gives an idea of current professional approaches and computational methods for analysing dynamic properties. Given the scale and organization of information, the book will also be a useful tool in the analysis of flight dynamics for professionals in this field. The book is sure to appeal to anyone interested in the dynamics of flight."
––Jaroslav Salga, Advances in Military Technology, Vol. 9, No. 1, June 2014

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