10

Hardware for Active Control

10.1 Introduction

    

10.1.1 Chapter outline

10.1.2 Advantages of digital controllers

10.1.3 Relationship to digital feedback control

10.2 Anti-aliasing filters

    

10.2.1 Application to error signals

10.2.2 Application to reference signals

10.3 Reconstruction filters

10.4 Filter delay

10.5 Data converters

    

10.5.1 Converter types

10.5.2 Oversampling

10.6 Data quantisation

    

10.6.1 Quantisation noise

10.6.2 Signal-to-noise ratio

10.5.2 Application to active control systems

10.7 Processor requirements

    

10.7.1 Fixed- and floating-point devices

10.8 Finite-precision effects

    

10.8.1 Truncation noise in digital filters

10.8.2 Effect on filter adaptation

10.8.3 DC drift

10.1 INTRODUCTION ...

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