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Adaptive Aeroservoelastic Control

Adaptive Aeroservoelastic Control PDF Author: Ashish Tewari
Publisher: John Wiley & Sons
ISBN: 1118457633
Category : TECHNOLOGY & ENGINEERING
Languages : en
Pages : 392

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Book Description
This is the first book on adaptive aeroservoelasticity and it presents the nonlinear and recursive techniques for adaptively controlling the uncertain aeroelastic dynamics Covers both linear and nonlinear control methods in a comprehensive manner Mathematical presentation of adaptive control concepts is rigorous Several novel applications of adaptive control presented here are not to be found in other literature on the topic Many realistic design examples are covered, ranging from adaptive flutter suppression of wings to the adaptive control of transonic limit-cycle oscillations

Adaptive Aeroservoelastic Control

Adaptive Aeroservoelastic Control PDF Author: Ashish Tewari
Publisher: John Wiley & Sons
ISBN: 1118457633
Category : TECHNOLOGY & ENGINEERING
Languages : en
Pages : 392

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Book Description
This is the first book on adaptive aeroservoelasticity and it presents the nonlinear and recursive techniques for adaptively controlling the uncertain aeroelastic dynamics Covers both linear and nonlinear control methods in a comprehensive manner Mathematical presentation of adaptive control concepts is rigorous Several novel applications of adaptive control presented here are not to be found in other literature on the topic Many realistic design examples are covered, ranging from adaptive flutter suppression of wings to the adaptive control of transonic limit-cycle oscillations

International Conference on Adaptive Structures

International Conference on Adaptive Structures PDF Author:
Publisher:
ISBN:
Category : Airframes
Languages : en
Pages :

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Smart Structures and Materials

Smart Structures and Materials PDF Author:
Publisher:
ISBN:
Category : Smart materials
Languages : en
Pages :

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Automatic Flight Control Systems

Automatic Flight Control Systems PDF Author: Thomas Lombaerts
Publisher: IntechOpen
ISBN: 9789533078168
Category : Technology & Engineering
Languages : en
Pages : 216

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Book Description
The history of flight control is inseparably linked to the history of aviation itself. Since the early days, the concept of automatic flight control systems has evolved from mechanical control systems to highly advanced automatic fly-by-wire flight control systems which can be found nowadays in military jets and civil airliners. Even today, many research efforts are made for the further development of these flight control systems in various aspects. Recent new developments in this field focus on a wealth of different aspects. This book focuses on a selection of key research areas, such as inertial navigation, control of unmanned aircraft and helicopters, trajectory control of an unmanned space re-entry vehicle, aeroservoelastic control, adaptive flight control, and fault tolerant flight control. This book consists of two major sections. The first section focuses on a literature review and some recent theoretical developments in flight control systems. The second section discusses some concepts of adaptive and fault-tolerant flight control systems. Each technique discussed in this book is illustrated by a relevant example.

International Conference on Adaptive Structures and Technologies

International Conference on Adaptive Structures and Technologies PDF Author:
Publisher:
ISBN:
Category : Airframes
Languages : en
Pages :

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A Collection of Technical Papers: Structural dynamics I

A Collection of Technical Papers: Structural dynamics I PDF Author:
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages :

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Adaptive Reconfigurable Control Based on a Reduced Order System Identification for Flutter and Aeroservoelastic Instability Suppression

Adaptive Reconfigurable Control Based on a Reduced Order System Identification for Flutter and Aeroservoelastic Instability Suppression PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 74

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Book Description
This report documents the design of a reconfigurable adaptive control (RAC) system for flutter/aeroservoelasticity (ASE) instability suppression of battle-damaged aircraft and limit cycle oscillation (LCO) suppression of aircraft/store configurations. With the F/A-18 as a baseline aircraft, rapid suppression of its critical damage/flutter and LCO (at 5.6 and 8.8 Hz) has been successfully demonstrated through eight cases of numerical simulations studied. The developed RAC system is a modular control design in that the flutter/LCO control can readily be combined with the rigid-body flight (RBF) control, thereby minimizing the impact on the existing flight control system for retrofit. The RAC system consists of a newly developed on-line modal parameter estimation (MPE) for system identification and on-line modified model-following reconfigurable (MMFR) algorithm for rapid flutter/LCO control (0.2 and 0.8 sec). A massive screening technique using an expedient nonlinear unsteady transonic method (ZTAIC) to generate plant matrices permits efficient identification of critical damage cases of flutter/ASE instability. Reduced-order techniques using proper orthogonal decomposition (POD) and minimum state (MIST) methods reduce the system to seven states. This allows the on-line algorithm to be operated within fractions of one second. The number of sensor locations are minimized to two at wing-tip for flutter/LCO control; and to four with two additional existing sensors in the fuselage for LCO/RBF dynamic control. Effective control surfaces for all cases considered are found to be the aileron and the trailing-edge flap rather than the leading edge flap. Essential tasks of phase Ii will be performed jointly with Boeing/St Louis with emphasis on nonlinear control analysis including actuator loading, control surface rates, 80Hz software update and software analysis for implementing LCO and flutter controllers in the FSFCC.

Automatic Flight Control Systems

Automatic Flight Control Systems PDF Author: Thomas Lombaerts
Publisher: BoD – Books on Demand
ISBN: 9533078162
Category : Technology & Engineering
Languages : en
Pages : 216

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Book Description
The history of flight control is inseparably linked to the history of aviation itself. Since the early days, the concept of automatic flight control systems has evolved from mechanical control systems to highly advanced automatic fly-by-wire flight control systems which can be found nowadays in military jets and civil airliners. Even today, many research efforts are made for the further development of these flight control systems in various aspects. Recent new developments in this field focus on a wealth of different aspects. This book focuses on a selection of key research areas, such as inertial navigation, control of unmanned aircraft and helicopters, trajectory control of an unmanned space re-entry vehicle, aeroservoelastic control, adaptive flight control, and fault tolerant flight control. This book consists of two major sections. The first section focuses on a literature review and some recent theoretical developments in flight control systems. The second section discusses some concepts of adaptive and fault-tolerant flight control systems. Each technique discussed in this book is illustrated by a relevant example.

Aeroservoelasticity

Aeroservoelasticity PDF Author: Ashish Tewari
Publisher: Springer
ISBN: 1493923684
Category : Mathematics
Languages : en
Pages : 318

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Book Description
This monograph presents the state of the art in aeroservoelastic (ASE) modeling and analysis and develops a systematic theoretical and computational framework for use by researchers and practicing engineers. It is the first book to focus on the mathematical modeling of structural dynamics, unsteady aerodynamics, and control systems to evolve a generic procedure to be applied for ASE synthesis. Existing robust, nonlinear, and adaptive control methodology is applied and extended to some interesting ASE problems, such as transonic flutter and buffet, post-stall buffet and maneuvers, and flapping flexible wing. The author derives a general aeroservoelastic plant via the finite-element structural dynamic model, unsteady aerodynamic models for various regimes in the frequency domain, and the associated state-space model by rational function approximations. For more advanced models, the full-potential, Euler, and Navier-Stokes methods for treating transonic and separated flows are also briefly addressed. Essential ASE controller design and analysis techniques are introduced to the reader, and an introduction to robust control-law design methods of LQG/LTR and H2/H∞ synthesis is followed by a brief coverage of nonlinear control techniques of describing functions and Lyapunov functions. Practical and realistic aeroservoelastic application examples derived from actual experiments are included throughout. Aeroservoelasiticity fills an important gap in the aerospace engineering literature and will be a valuable guide for graduate students and advanced researchers in aerospace engineering, as well as professional engineers, technicians, and test pilots in the aircraft industry and laboratories.

International Aerospace Abstracts

International Aerospace Abstracts PDF Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages :

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