Automatic Flight Control Systems
E-Book Overview
This book provides readers with a design approach to the automatic flight control systems (AFCS). The AFCS is the primary on-board tool for long flight operations, and is the foundation for the airspace modernization initiatives. In this text, AFCS and autopilot are employed interchangeably. It presents fundamentals of AFCS/autopilot, including primary subsystems, dynamic modeling, AFCS categories/functions/modes, servos/actuators, measurement devices, requirements, functional block diagrams, design techniques, and control laws. The book consists of six chapters. The first two chapters cover the fundamentals of AFCS and closed-loop control systems in manned and unmanned aircraft. The last four chapters present features of Attitude control systems (Hold functions), Flight path control systems (Navigation functions), Stability augmentation systems, and Command augmentation systems, respectively.
E-Book Information
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Series: Synthesis Lectures on Mechanical Engineering
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Year: 2,020
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Pages: xiv+159
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Pages In File: 174
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Language: English
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Topic: 220
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Identifier: 1681737302,9781681737300
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Org File Size: 39,282,949
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Extension: pdf
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Toc: Preface
Fundamentals of Automatic Flight Control Systems
Introduction
Elements of an AFCS
Relations Between AFCS and Human Pilot
Primary Subsystems of an AFCS
Autonomy Classification
Flight Dynamics
Dynamics Modeling
Flight Fundamental Governing Equations
Nonlinear Fully Coupled Equations of Motion
Linear Decoupled Equations of Motion
AFCS Categories and Modes
Stability Augmentation Systems
Attitude Control Systems (Hold Functions)
Flight Path Control Systems (Navigation Functions)
Command Augmentation Systems
Mode Control Panel Examples
Flying Qualities
Fundamentals
Classes, Categories, and Acceptability Levels
Questions
Closed-Loop Control Systems
Introduction
Fundamentals of Control Systems
Definitions and Elements
Control Laws
Controller Configurations and Control Architectures
Flight Control Modes
Sensors
Servo/Actuator
Terminology
Electric Motor
Hydraulic Actuator
Delay
Saturation
Flight Control Requirements
Longitudinal Control Requirements
Roll Control Requirements
Directional Control Requirements
Control Laws
PID Controller
Optimal Control – Linear Quadratic Regulator
Gain Scheduling
Robust Control
Digital Control
Control System Design Process
Questions
Attitude Control Systems
Introduction
Cruising Flight Requirements
Pitch Attitude Hold
Altitude Hold
Mach Hold
Wing Leveler
Turn Coordinator
Governing Equations of a Coordinated Turn
Block Diagram
Aileron-to-Rudder Interconnect
Heading Angle Hold
Vertical Speed Hold
Questions
Flight Path Control Systems
Introduction
Landing Operation Procedures
Approach Localizer Tracking
Approach Glide Slope Tracking
Automatic Flare Control
Automatic Landing System
VOR Tracking
Automatic Flight Level Change
Automatic Climb and Descent
Terrain-Following Control System
Heading Tracking System
Tracking a Series of Waypoints
Detect and Avoid System
Questions