3

Single-Channel Feedforward Control

3.1 Introduction

    

3.1.1 Chapter outline

3.1.2 Digital controllers

3.1.3 Feedforward control

3.1.4 Acoustic and structural plant response

3.2 Control of deterministic disturbances

    

3.2.1 Waveform synthesis

3.2.2 Harmonic control

3.2.3 Adaptive harmonic control

3.2.4 Stability conditions

3.2.5 FFT controller

3.3 Optimal control of stochastic disturbances

    

3.3.1 Block diagrams for feedforward control

3.3.2 Unconstrained optimisation in the frequency domain

3.3.3 Causally constrained optimisation in the transform domain

3.3.4 Optimisation in the time domain

3.4 Adaptive FIR controllers

    

3.4.1 Filtered-reference LMS algorithm

3.4.2 Condition for stability

3.4.3 Performance degradation ...

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