Signal Processing For Active Control

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Author: Stephen Elliott
Publisher: Elsevier
ISBN: 9780080517131
Size: 76.61 MB
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Signal Processing For Active Control by Stephen Elliott

Original Title: Signal Processing For Active Control

Signal Processing for Active Control sets out the signal processing and automatic control techniques that are used in the analysis and implementation of active systems for the control of sound and vibration. After reviewing the performance limitations introduced by physical aspects of active control, Stephen Elliott presents the calculation of the optimal performance and the implementation of adaptive real time controllers for a wide variety of active control systems. Active sound and vibration control are technologically important problems with many applications. 'Active control' means controlling disturbance by superimposing a second disturbance on the original source of disturbance. Put simply, initial noise + other specially-generated noise or vibration = silence [or controlled noise]. This book presents a unified approach to techniques that are used in the analysis and implementation of different control systems. It includes practical examples at the end of each chapter to illustrate the use of various approaches. This book is intended for researchers, engineers, and students in the field of acoustics, active control, signal processing, and electrical engineering.

Active Control Of Sound

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Author: P. A. Nelson
Publisher: Academic Pr
ISBN: 9780125154260
Size: 50.93 MB
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Active Control Of Sound by P. A. Nelson

Original Title: Active Control Of Sound

Recent technological advances in the development of fast digital signal processors have made the active control of sound a practical proposition. This book brings together results from research in the two disciplinesof acoustics and signal processing and presents the fundamentals of noise control in a unified manner. Practical applications are presented wherever possible although the emphasis is on the algorithmic principles which form the foundation of practical systems. The volume is written in textbook style and aimed at both undergraduate and postgraduate students of acoustics and signal processing, professional acoustical and electrical engineers, and researchers in the field of active control." Key Features * Presents the fundamental principles governing both the physical properties of sound fields and modern digital techniques for processing acoustic signals * Describes the physical mechanisms and energy interchanges involved in active control of sound for one- and three-dimensional problems * Presents the principles and practicalities of the design of single- and multi-channel controllers for both random and deterministic sound fields

Active Control Of Vibration

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Author: Christopher C. Fuller
Publisher: Academic Press
ISBN: 9780080525914
Size: 45.47 MB
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Active Control Of Vibration by Christopher C. Fuller

Original Title: Active Control Of Vibration

This book is a companion text to Active Control of Sound by P.A. Nelson and S.J. Elliott, also published by Academic Press. It summarizes the principles underlying active vibration control and its practical applications by combining material from vibrations, mechanics, signal processing, acoustics, and control theory. The emphasis of the book is on the active control of waves in structures, the active isolation of vibrations, the use of distributed strain actuators and sensors, and the active control of structurally radiated sound. The feedforward control of deterministic disturbances, the active control of structural waves and the active isolation of vibrations are covered in detail, as well as the more conventional work on modal feedback. The principles of the transducers used as actuateors and sensors for such control strategies are also given an in-depth description. The reader will find particularly interesting the two chapters on the active control of sound radiation from structures: active structural acoustic control. The reason for controlling high frequency vibration is often to prevent sound radiation, and the principles and practical application of such techniques are presented here for both plates and cylinders. The volume is written in textbook style and is aimed at students, practicing engineers, and researchers. Combines material from vibrations, signal processing, mechanics, and controls Summarizes new research in the field

Active Noise Control Primer

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Author: Scott D. Snyder
Publisher: Springer Science & Business Media
ISBN: 1441985603
Size: 57.69 MB
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Active Noise Control Primer by Scott D. Snyder

Original Title: Active Noise Control Primer

By providing all the basic knowledge needed to assess how useful active noise control will be for a given problem, this book assists in the designing, setting up, and tuning of an active noise-control system. Written for students who have no prior knowledge of acoustics, signal processing, or noise control but who do have a reasonable grasp of basic physics and mathematics, the text is short and descriptive, leaving all mathematical details and proofs concerning vibrations, signal processing and the like to more advanced texts or research monographs. The book can thus be used in independent study, in a classroom with laboratories, or in conjunction with a kit for experiment or demonstration. Topics covered include basic acoustics, human perception and sound, sound intensity and related concepts, fundamentals of passive noise- control strategies, basics of digital systems and adaptive controllers, and active noise control systems.

Active Control Of Noise And Vibration Second Edition

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Author: Colin Hansen
Publisher: CRC Press
ISBN: 1482234009
Size: 52.23 MB
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Active Control Of Noise And Vibration Second Edition by Colin Hansen

Original Title: Active Control Of Noise And Vibration Second Edition

Since the publication of the first edition, considerable progress has been made in the development and application of active noise control (ANC) systems, particularly in the propeller aircraft and automotive industries. Treating the active control of both sound and vibration in a unified way, this second edition of Active Control of Noise and Vibration continues to combine coverage of fundamental principles with the most recent theoretical and practical developments. What’s New in This Edition Revised, expanded, and updated information in every chapter Advances in feedforward control algorithms, DSP hardware, and applications Practical application examples of active control of noise propagating in ducts The use of a sound intensity cost function, model reference control, sensing radiation modes, modal filtering, and a comparison of the effectiveness of various sensing strategies New material on feedback control of sound transmission into enclosed spaces New material on model uncertainty, experimental determination of the system model, optimization of the truncated model, collocated actuators and sensors, biologically inspired control, and a discussion of centralised versus de-centralised control A completely revised chapter on control system implementation New material on parametric array loudspeakers, turbulence filtering, and virtual sensing More material on smart structures, electrorheological fluids, and magnetorheological fluids Integrating the related disciplines of active noise control and active vibration control, this comprehensive two-volume set explains how to design and implement successful active control systems in practice. It also details the pitfalls one must avoid to ensure a reliable and stable system.

Digital Signal Processing In Power Electronics Control Circuits

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Author: Krzysztof Sozański
Publisher: Springer
ISBN: 1447173325
Size: 63.64 MB
Format: PDF
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Digital Signal Processing In Power Electronics Control Circuits by Krzysztof Sozański

Original Title: Digital Signal Processing In Power Electronics Control Circuits

This revised and extended second edition covers problems concerning the design and realization of digital control algorithms for power electronics circuits using digital signal processing (DSP) methods. This book discusses signal processing, starting from analog signal acquisition, through conversion to digital form, methods of filtration and separation, and ending with pulse control of output power transistors. The book is focused on two applications for the considered methods of digital signal processing, a three-phase shunt active power filter and a digital class-D audio power amplifier. The book bridges the gap between power electronics and digital signal processing. Many control algorithms and circuits for power electronics in the current literature are described using analog transmittances. This may not always be acceptable, especially if half of the sampling frequencies and half of the power transistor switching frequencies are close to the band of interest. Therefore in this book, a digital circuit is treated as a digital circuit with its own peculiar characteristics, rather than an analog circuit. This helps to avoid errors and instability. This edition includes a new chapter dealing with selected problems of simulation of power electronics systems together with digital control circuits. The book includes numerous examples using MATLAB and PSIM programs.

Adaptive Feed Forward Control Of Low Frequency Interior Noise

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Author: Thomas Kletschkowski
Publisher: Springer Science & Business Media
ISBN: 9789400725379
Size: 15.59 MB
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Adaptive Feed Forward Control Of Low Frequency Interior Noise by Thomas Kletschkowski

Original Title: Adaptive Feed Forward Control Of Low Frequency Interior Noise

This book presents a mechatronic approach to Active Noise Control (ANC). It describes the required elements of system theory, engineering acoustics, electroacoustics and adaptive signal processing in a comprehensive, consistent and systematic manner using a unified notation. Furthermore, it includes a design methodology for ANC-systems, explains its application and describes tools to be used for ANC-system design. From the research point of view, the book presents new approaches to sound source localization in weakly damped interiors. One is based on the inverse finite element method, the other is based on a sound intensity probe with an active free field. Furthermore, a prototype of an ANC-system able to reach the physical limits of local (feed-forward) ANC is described. This is one example for applied research in ANC-system design. Other examples are given for (i) local ANC in a semi-enclosed subspace of an aircraft cargo hold and (ii) for the combination of audio entertainment with ANC.

Active Sound And Vibration Control

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Author: M. O. Tokhi
Publisher: IET
ISBN: 9780852960387
Size: 46.81 MB
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Active Sound And Vibration Control by M. O. Tokhi

Original Title: Active Sound And Vibration Control

This book presents the established fundamentals in the area of active sound and vibration control as well as exploring the new and emerging technologies and techniques. There has been a considerable amount of effort devoted to the development and realization of methodologies for control of sound and vibration, and this book covers the latest theoretical, algorithmic and practical applications including: noise control in 3D propagation, adaptive algorithms, prediction, processing and tuning, neuro-active control of microvibrations, and noise reduction in locomotives and vehicles. An invaluable reference for electrical, mechanical and control engineers, designers, and researchers interested in noise and vibration control.

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