Active Control of Noise and Vibration (Multiple-component retail product, 2 ed)

Volume I

Background
Introduction and Potential Applications
Overview of Active Control Systems
References

Foundations of Acoustics and Vibration
Acoustic Wave Equation
Structural Mechanics Fundamentals
Vibration of Continuous Systems
Structural Sound Radiation, Sound Propagation and Green’s Functions
Impedance and Intensity
References

Spectral Analysis
Digital Filtering
Discrete Fourier Analysis
Signal Types
Convolution
Important Frequency Domain Functions
References

Modal Analysis
Introduction
Modal Analysis: Analytical
Modal Analysis: Experimental
Modal Amplitude Determination from System Response Measurements
References

Modern Control Review
Introduction
System Arrangements
State-Space System Models for Feedback Control
Discrete Time System Models for Feedback Control
Frequency Domain Analysis of Poles, Zeroes and System Response
Controllability and Observability
Control Law Design via Pole Placement
Optimal Control
Observer Design
Random Processes Revisited
Optimal Observers: Kalman Filter
Combined Control Law/Observer: Compensator Design
Adaptive Feedback Control
References

Feedforward Control System Design
Introduction
What Does Feedforward Control Do?
Fixed Characteristic Feedforward Control Systems
Waveform Synthesis
Non-Recursive (FIR) Deterministic Gradient Descent Algorithm
LMS Algorithm
Single-Channel Filtered-x LMS Algorithm
The Multiple Input, Multiple Output Filtered-x LMS Algorithm
Other Useful Algorithms Based on the LMS Algorithm
Cancellation Path Transfer Function Estimation
Leaky Algorithms and Output Effort Constraint
Adaptive Filtering in The Frequency Domain
Adaptive Signal Processing Using Recursive (IIR) Filters
Application of Adaptive IIR Filters to Active Control Systems
Alternative Approach to Using IIR Filters
Adaptive Filtering Using Artificial Neural Networks
Neural Network-Based Feedforward Active Control Systems
Adaptive Filtering Using a Genetic Algorithm
References

Active Control of Noise Propagating in Ducts
Introduction
Control System Implementation
Harmonic (or Periodic) Plane Waves
Higher-Order Modes
Acoustic Measurements in Ducts
Sound Radiated from IC Engine Exhaust Outlets
Active / Passive Mufflers
Control of Pressure Pulsations in Liquid Filled Ducts
Active Headsets and Hearing Protectors
References

Volume II

Active Control of Free-Field Sound Radiation
Introduction
Control of Harmonic Sound Pressure at a Point
Minimum Acoustic Power Output of Two Free-Field Monopole Sources
Active Control of Acoustic Radiation from Multiple Primary Monopole Sources Using Multiple Control Monopole Sources
Effect of Transducer Location
Reference Sensor Location Considerations
Active Control of Harmonic Sound Radiation from Planar Structures: General Problem Formulation
Example: Control of Sound Radiation from a Rectangular Plate
Electrical Transformer Noise Control
A Closer Look At Control Mechanisms and a Common Link among All Active Control Systems
Minimising Sound Radiation By Minimising Acoustic Radiation Modes
Some Notes on Approaching the Design of an Active Control System for Sound Radiation from a Vibrating Surface
Active Control of Free-Field Random Noise
Active Control of Impact Acceleration Noise
Feedback Control of Sound Radiation From Vibrating Structures
References

Active Control of Enclosed Sound Fields
Introduction
Control of Harmonic Sound Fields in Rigid Enclosures at Discrete Locations
Global Control of Sound Fields in Rigid Enclosures
Control of Sound Fields in Coupled Enclosures at Discrete Locations
Minimisation of Acoustic Potential Energy in Coupled Enclosures
Calculation of Optimal Control Source Volume Velocities Using Boundary Element Methods
Control Mechanisms
Influence of Control Source and Error Sensor Arrangement
Controlling Vibration to Control Sound Transmission
Influence of Modal Density
Control of Sound at a Point in Enclosures with High Modal Densities
State-Space Models of Acoustic Systems
Aircraft Interior Noise
Automobile Interior Noise
References

Feedforward Control of Vibration in Beams and Plates
Infinite Beam
Finite Beams
Active Control of Vibration in a Semi-Infinite Plate
References

Feedback Control of Flexible Structures Described in Terms of Modes
Introduction
Modal Control
Independent Modal Space Control
Model Reduction
Effect of Model Uncertainty
Experimental Determination of the System Model through Subspace Model Identification
Sensor and Actuator Placement Considerations
Centralised Versus Decentralised and Distributed Control
References

Vibration Isolation
Introduction
Feedback Control
Applications of Feedback Control
Feedforward Control: Basic SDOF System
Feedforward Control: Single Isolator between a Rigid Body and a Flexible Beam
Feedforward Control: Multiple Isolators between a Rigid Body and a Flexible Panel
Feedforward Control: Multiple Isolators between a Rigid Body and a Flexible Cylinder
Feedforward Control: Summary
References

Control System Implementation
Hierarchy of Active Control System Implementation
Analogue Circuit Controllers
Digital Controllers
An Example of Active Control System Implementation
References

Sound Sources and Sound Sensors
Loudspeakers
Horns
Omni-Directional Microphones
Directional Microphones
Turbulence Filtering Sensors
Virtual Sensing Algorithms for Active Noise Control
References

Vibration Sensors and Vibration Sources
Accelerometers
Velocity Transducers
Displacement Transducers
Strain Sensors
Hydraulic Actuators
Pneumatic Actuators
Proof Mass (or Inertial) Actuator
Electrodynamic and Electromagnetic Actuators
Magnetostrictive Actuators
Shape Memory Alloy Actuators
Piezoelectric (Electrostrictive) Actuators
Smart Structures
Electro-Rheological Fluids
Magneto-Rheological Fluids
References

Appendix A Brief Review of Some Results of Linear Algebra
Matrices and Vectors
Addition, Subtraction and Multiplication by a Scalar
Multiplication of Matrices
Transposition
Determinants
Matrix Inverses
Rank of a Matrix
Positive and Non-Negative Definite Matrices
Eigenvalues and Eigenvectors
Orthogonality
Vector Norms
References

Index