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
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
Introduction to Mechanical Vibrations: Terminology.
Single-degree-of-freedom (SDOF) Systems. Free Motion of SDOF
Systems. Damped Motion of SDOF Systems. Forced Response of SDOF
Systems. Transient Response of SDOF Systems.
Multi-degree-of-freedom (MDOF) Systems. Free Motion of MDOF
Systems. Forced Response of MDOF Systems. Damped Motion of MDOF
Systems. Finite Element Analysis of Vibrating Mechanical Systems.
Introduction to Waves in Structures: Longitudinal Waves. Flexural
Waves. Flexural Response of an Infinite Beam to an Oscillating
Point Force. Flexural Wave Power Flow. Flexural Response of an
Infinite Thin Beam to an Oscillating Line Moment. Free Flexural
Motion of Finite Thin Beams. Response of a Finite Thin Beam to an
Arbitrary Oscillating Force Distribution. Vibration of Thin Plates.
Free Vibration of Thin Plates. Response of a Thin Rectangular
Simply Supported Plate to an Arbitrary Oscillating Force
Distribution. Vibration of Infinite Thin Cylinders. Free Vibration
of Finite Thin Cylinders. Harmonic Forced Vibration of Infinite
Thin Cylinders. Feedback Control: Single-channel Feedback Control.
Stability of a Single-Channel System. Modification of the Response
of an SDOF System. The Effect of Delays in the Feedback Loop. The
State Variable Approach. Example of a Two-degree-of-freedom System.
Output Feedback and State Feedback. State Estimation and Observers.
Optimal Control. Modal Control. Feedforward Control: Single Channel
Feedforward Control. The Effect of Measurement Noise. Adaptive
Digital Controllers. Multichannel Feedforward Control. Adaptive
Frequency Domain Controllers. Adaptive Time Domain Controllers.
Equivalent Feedback Controller Interpretation. Distributed
Transducers for Active Control of Vibration. Active Control of
Vibration in Structures: Feedforward Control of Finite Structures.
Feedback Control of Finite Structures. Feedforward Control of Wave
Transmission. Actuator Arrays for Control of Flexural Waves. Sensor
Arrays for Control of Flexural Waves. Feedforward Control of
Flexural Waves. Feedback Control of Flexural Waves. Active
Isolation of Vibrations: Isolation of Periodic Vibrations of an
SDOF System. Vibration Isolation From a Flexible Receiver; the
Effects of Secondary Force Location. Active Isolation of Periodic
Vibrations Using Multiple Secondary Force Inputs. Finite Element
Analysis of an Active System for the Isolation of Periodic
Vibrations. Practical Examples of Multi-Channel Feedforward Control
for the Isolation of Periodic Vibrations. Isolation of
Unpredictable Vibrations from a Receiving Structure. Isolation of
Vibrating Systems from Random External Excitation; the
Possibilities for Feedforward Control. Isolation of Vibrating
Systems from Random External Excitation; Analysis of Feedback
Control Strategies. Isolation of Vibrating Systems from Random
External Excitation; Formulation in Terms of Modern Control Theory.
Active Isolation of Vehicle Vibrations from Road and Track
Irregularities. Active Structural Acoustic Control, I. Plate
Systems: Sound Radiation by Planar Vibrating Surfaces; the Rayleigh
Integral. The Calculation of Radiated Sound Fields by Using
Wavenumber Fourier Transforms. Sound Power Radiation From
Structures in Terms of Their Multi-Modal Response. General Analysis
of Active Structural Acoustic Control (ASAC) for Plate Systems.
Active Control of Sound Transmission Through a Rectangular Plate
Using Point Force Actuators. Active Control of Structurally
Radiated Sound Using Multiple Piezoelectric Actuator;
Interpretation of Behaviour in Terms of the Spatial Wavenumber
Spectrum. The Use of Piezoelectric Distributed Structural Error
Sensors in ASAC. An Example of the Implementation of Feedforward
ASAC. Feeback Control of Sound Radiation From a Vibrating Baffled
Piston. Feedback Control of Sound Radiation From Distributed
Elastic Structures. Active Structural Acoustic Control, II.
Cylinder Systems:
Coupled Cylinder Acoustic Fields. Response of an Infinite Cylinder
to a Harmonic Forcing Function. Active Control of Cylinder Interior
Acoustic Fields Using Point Forces. Active Control of Vibration and
Acoustic Transmission in Fluid-Filled Piping Systems. Active
Control of Sound Radiation From Vibrating Cylinders. Active Control
of Sound in Finite Cylinder Systems. Control of Interior Noise in a
Full Scale Jet Aircraft Fuselage. Appendix. References. Index.
* Combines material from vibrations, signal processing, mechanics,
and controls
* Summarizes new research in the field
P.A. Nelson is Professor of Acoustics.
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