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Smart Helicopter Rotors

Smart Helicopter Rotors Author Ranjan Ganguli
ISBN-10 9783319247687
Release 2015-12-16
Pages 257
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Exploiting the properties of piezoelectric materials to minimize vibration in rotor-blade actuators, this book demonstrates the potential of smart helicopter rotors to achieve the smoothness of ride associated with jet-engined, fixed-wing aircraft. Vibration control is effected using the concepts of trailing-edge flaps and active-twist. The authors’ optimization-based approach shows the advantage of multiple trailing-edge flaps and algorithms for full-authority control of dual trailing-edge-flap actuators are presented. Hysteresis nonlinearity in piezoelectric stack actuators is highlighted and compensated by use of another algorithm. The idea of response surfaces provides for optimal placement of trailing-edge flaps. The concept of active twist involves the employment of piezoelectrically induced shear actuation in rotating beams. Shear is then demonstrated for a thin-walled aerofoil-section rotor blade under feedback-control vibration minimization. Active twist is shown to be significant in reducing vibration caused by dynamic stall. The exposition of ideas, materials and algorithms in this monograph is supported by extensive reporting of results from numerical simulations of smart helicopter rotors. This monograph will be a valuable source of reference for researchers and engineers with backgrounds in aerospace, mechanical and electrical engineering interested in smart materials and vibration control. Advances in Industrial Control aims to report and encourage the transfer of technology in control engineering. The rapid development of control technology has an impact on all areas of the control discipline. The series offers an opportunity for researchers to present an extended exposition of new work in all aspects of industrial control.



Advanced Control of Piezoelectric Micro Nano Positioning Systems

Advanced Control of Piezoelectric Micro  Nano Positioning Systems Author Qingsong Xu
ISBN-10 9783319216232
Release 2015-08-28
Pages 257
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This book explores emerging methods and algorithms that enable precise control of micro-/nano-positioning systems. The text describes three control strategies: hysteresis-model-based feedforward control and hysteresis-model-free feedback control based on and free from state observation. Each paradigm receives dedicated attention within a particular part of the text. Readers are shown how to design, validate and apply a variety of new control approaches in micromanipulation: hysteresis modelling, discrete-time sliding-mode control and model-reference adaptive control. Experimental results are provided throughout and build up to a detailed treatment of practical applications in the fourth part of the book. The applications focus on control of piezoelectric grippers. Advanced Control of Piezoelectric Micro-/Nano-Positioning Systems will assist academic researchers and practising control and mechatronics engineers interested in suppressing sources of nonlinearity such as hysteresis and drift when combining position and force control of precision systems with piezoelectric actuation.



Active Control in Mechanical Engineering

Active Control in Mechanical Engineering Author Louis Jezequel
ISBN-10 9058091325
Release 2000-01-01
Pages 372
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The introduction of active control in structural dynamics has led to a number of developments over wide-ranging industrial domains. This work investigates this area and examines a number of topics including: smart materials and structures; new strategies of active control and its applications.



Advanced UAV Aerodynamics Flight Stability and Control

Advanced UAV Aerodynamics  Flight Stability and Control Author Pascual Marques
ISBN-10 9781118928684
Release 2017-07-11
Pages 776
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Comprehensively covers emerging aerospace technologies Advanced UAV aerodynamics, flight stability and control: Novel concepts, theory and applications presents emerging aerospace technologies in the rapidly growing field of unmanned aircraft engineering. Leading scientists, researchers and inventors describe the findings and innovations accomplished in current research programs and industry applications throughout the world. Topics included cover a wide range of new aerodynamics concepts and their applications for real world fixed-wing (airplanes), rotary wing (helicopter) and quad-rotor aircraft. The book begins with two introductory chapters that address fundamental principles of aerodynamics and flight stability and form a knowledge base for the student of Aerospace Engineering. The book then covers aerodynamics of fixed wing, rotary wing and hybrid unmanned aircraft, before introducing aspects of aircraft flight stability and control. Key features: Sound technical level and inclusion of high-quality experimental and numerical data. Direct application of the aerodynamic technologies and flight stability and control principles described in the book in the development of real-world novel unmanned aircraft concepts. Written by world-class academics, engineers, researchers and inventors from prestigious institutions and industry. The book provides up-to-date information in the field of Aerospace Engineering for university students and lecturers, aerodynamics researchers, aerospace engineers, aircraft designers and manufacturers.



Magnetorheology

Magnetorheology Author Norman M Wereley
ISBN-10 9781849737548
Release 2013-11-20
Pages 410
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Magnetorheological fluids, smart fluids which change viscosity in the presence of a magnetic field, are of great commercial interest for many engineering applications such as shock absorbers and dampers in aerospace. Magnetorheology: Advances and Applications provides an update on the key developments in the physics, chemistry and uses of magnetorheological fluids. Topics covered include the role of interparticle friction and rotational diffusion, magnetoelasticity, nondimensional flow analysis, thin-film rheology, tribology, coated magnetorheological composite particles and magnetorheological devices with multiple functions. Specific chapters on applications cover adaptive magnetorheological energy absorbing mounts for shock mitigation, magnetorheological fluid-based high precision finishing technologies, adaptive magnetorheological landing gear systems and magnetorheological lag dampers for stability augmentation in helicopters. Edited by a leading expert and with contributions from distinguished scientists in the field this timely book is suitable for chemists, physicists and engineers wanting to gain a comprehensive overview of these smart materials.



International Aerospace Abstracts

International Aerospace Abstracts Author
ISBN-10 STANFORD:36105021811372
Release 1999
Pages
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International Aerospace Abstracts has been writing in one form or another for most of life. You can find so many inspiration from International Aerospace Abstracts also informative, and entertaining. Click DOWNLOAD or Read Online button to get full International Aerospace Abstracts book for free.



The Shock and Vibration Digest

The Shock and Vibration Digest Author
ISBN-10 STANFORD:36105028839582
Release 2000
Pages
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The Shock and Vibration Digest has been writing in one form or another for most of life. You can find so many inspiration from The Shock and Vibration Digest also informative, and entertaining. Click DOWNLOAD or Read Online button to get full The Shock and Vibration Digest book for free.



Morphing Wing Technologies

Morphing Wing Technologies Author Sergio Ricci
ISBN-10 9780081009697
Release 2017-10-27
Pages 978
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Morphing Wings Technologies: Large Commercial Aircraft and Civil Helicopters offers a fresh look at current research on morphing aircraft, including industry design, real manufactured prototypes and certification. This is an invaluable reference for students in the aeronautics and aerospace fields who need an introduction to the morphing discipline, as well as senior professionals seeking exposure to morphing potentialities. Practical applications of morphing devices are presented—from the challenge of conceptual design incorporating both structural and aerodynamic studies, to the most promising and potentially flyable solutions aimed at improving the performance of commercial aircraft and UAVs. Morphing aircraft are multi-role aircraft that change their external shape substantially to adapt to a changing mission environment during flight. The book consists of eight sections as well as an appendix which contains both updates on main systems evolution (skin, structure, actuator, sensor, and control systems) and a survey on the most significant achievements of integrated systems for large commercial aircraft. Provides current worldwide status of morphing technologies, the industrial development expectations, and what is already available in terms of flying systems Offers new perspectives on wing structure design and a new approach to general structural design Discusses hot topics such as multifunctional materials and auxetic materials Presents practical applications of morphing devices



AIAA Journal

AIAA Journal Author American Institute of Aeronautics and Astronautics
ISBN-10 STANFORD:36105110898454
Release 2002
Pages
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AIAA Journal has been writing in one form or another for most of life. You can find so many inspiration from AIAA Journal also informative, and entertaining. Click DOWNLOAD or Read Online button to get full AIAA Journal book for free.



Ferroelectric Devices 2nd Edition

Ferroelectric Devices 2nd Edition Author Kenji Uchino
ISBN-10 9781439803769
Release 2009-11-04
Pages 367
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Updating its bestselling predecessor, Ferroelectric Devices, Second Edition assesses the last decade of developments—and setbacks—in the commercialization of ferroelectricity. Field pioneer and esteemed author Uchino provides insight into why this relatively nascent and interdisciplinary process has failed so far without a systematic accumulation of fundamental knowledge regarding materials and device development. Filling the informational void, this collection of information reviews state-of-the-art research and development trends reflecting nano and optical technologies, environmental regulation, and alternative energy sources. Like the first edition, which became a standard in the field, this volume provides a general introduction to ferroelectrics with theoretical background. It then addresses practical design and device manufacturing, including recently developed processes and applications. Updating old data with a forecast of future developments, the text analyzes improvements to original ferroelectric devices to aid the design process of new ones. The second edition includes new sections on: Pb-free piezoelectrics Size effect on ferroelectricity Electrocaloric devices Micro mass sensor Piezoelectric energy harvesting Light valves and scanners Multi-ferroic devices, including magneto-electric sensors Uchino provides a general introduction to the theoretical background of ferroelectric devices, practical materials, device designs, drive/control techniques, and typical applications. He presents frequently asked questions from students, lab demonstrations for practical understanding, and "check point" quizzes and model solutions to monitor understanding. After a thorough exploration of ferroelectric devices and their past, this book looks to the industry’s future, assessing market size and remaining reliability/lifetime issues. The author also unveils his strategy for developing "best-selling" ferroelectric devices.



Identification Modeling and Characteristics of Miniature Rotorcraft

Identification Modeling and Characteristics of Miniature Rotorcraft Author Bernard Mettler
ISBN-10 9781475737851
Release 2013-03-14
Pages 226
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Identification Modeling and Characteristics of Miniature Rotorcraft introduces an approach to developing a simple and effective linear parameterized model of vehicle dynamics using the CIFERâ identification tool created by the Army/NASA Rotorcraft Division. It also presents the first application of the advanced control system optimization tool CONDUITâ to systematically and efficiently tune control laws for a model-scale UAV helicopter against multiple and competing dynamic response criteria. Identification Modeling and Characteristics of Miniature Rotorcraft presents the detailed account of how the theory was developed, the experimentation performed, and how the results were used. This book will serve as a basic and illustrative guide for all students that are interested in developing autonomous flying helicopters.



Modeling Control and Coordination of Helicopter Systems

Modeling  Control and Coordination of Helicopter Systems Author Beibei Ren
ISBN-10 9781461415633
Release 2012-02-02
Pages 232
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Modeling, Control and Coordination of Helicopter Systems provides a comprehensive treatment of helicopter systems, ranging from related nonlinear flight dynamic modeling and stability analysis to advanced control design for single helicopter systems, and also covers issues related to the coordination and formation control of multiple helicopter systems to achieve high performance tasks. Ensuring stability in helicopter flight is a challenging problem for nonlinear control design and development. This book is a valuable reference on modeling, control and coordination of helicopter systems,providing readers with practical solutions for the problems that still plague helicopter system design and implementation. Readers will gain a complete picture of helicopters at the systems level, as well as a better understanding of the technical intricacies involved.



Piezoelectric Transducers for Vibration Control and Damping

Piezoelectric Transducers for Vibration Control and Damping Author S.O. Reza Moheimani
ISBN-10 9781846283321
Release 2006-06-29
Pages 271
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This book presents recent developments in vibration control systems that employ embedded piezoelectric sensors and actuators, reviewing ways in which active vibration control systems can be designed for piezoelectric laminated structures, paying distinct attention to how such control systems can be implemented in real time. Includes numerous examples and experimental results obtained from laboratory-scale apparatus, with details of how similar setups can be built.



Smart Structures and Materials

Smart Structures and Materials Author Marc E. Regelbrugge
ISBN-10 UOM:39015047342889
Release 1998
Pages
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Smart Structures and Materials has been writing in one form or another for most of life. You can find so many inspiration from Smart Structures and Materials also informative, and entertaining. Click DOWNLOAD or Read Online button to get full Smart Structures and Materials book for free.



Journal of the American Helicopter Society

Journal of the American Helicopter Society Author
ISBN-10 UOM:39015058306039
Release 2002
Pages
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Journal of the American Helicopter Society has been writing in one form or another for most of life. You can find so many inspiration from Journal of the American Helicopter Society also informative, and entertaining. Click DOWNLOAD or Read Online button to get full Journal of the American Helicopter Society book for free.



Motion and Vibration Control

Motion and Vibration Control Author Heinz Ulbrich
ISBN-10 9781402094385
Release 2008-12-23
Pages 378
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Motion and vibration control is a fundamental technology for the development of advanced mechanical systems such as mechatronics, vehicle systems, robots, spacecraft, and rotating machinery. Often the implementation of high performance, low power consumption designs is only possible with the use of this technology. It is also vital to the mitigation of natural hazards for large structures such as high-rise buildings and tall bridges, and to the application of flexible structures such as space stations and satellites. Recent innovations in relevant hardware, sensors, actuators, and software have facilitated new research in this area. This book deals with the interdisciplinary aspects of emerging technologies of motion and vibration control for mechanical, civil and aerospace systems. It covers a broad range of applications (e.g. vehicle dynamics, actuators, rotor dynamics, biologically inspired mechanics, humanoid robot dynamics and control, etc.) and also provides advances in the field of fundamental research e.g. control of fluid/structure integration, nonlinear control theory, etc. Each of the contributors is a recognised specialist in his field, and this gives the book relevance and authority in a wide range of areas.



Communications in Interference Limited Networks

Communications in Interference Limited Networks Author Wolfgang Utschick
ISBN-10 9783319224404
Release 2016-02-04
Pages 519
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This book offers means to handle interference as a central problem of operating wireless networks. It investigates centralized and decentralized methods to avoid and handle interference as well as approaches that resolve interference constructively. The latter type of approach tries to solve the joint detection and estimation problem of several data streams that share a common medium. In fact, an exciting insight into the operation of networks is that it may be beneficial, in terms of an overall throughput, to actively create and manage interference. Thus, when handled properly, "mixing" of data in networks becomes a useful tool of operation rather than the nuisance as which it has been treated traditionally. With the development of mobile, robust, ubiquitous, reliable and instantaneous communication being a driving and enabling factor of an information centric economy, the understanding, mitigation and exploitation of interference in networks must be seen as a centrally important task.