understanding of active noise cancellation 理解噪声控制

噪声主动控制的入门书籍 澳大利亚汉森 部分目录： CHAPTER ONE. A LITTLE HISTORY ........................................................... 1 1.1 INTRODUCTION ...................................................................................... 1 1.2 EARLY HISTORY ..................................................................................... 2 1.3 LATER HISTORY ...................................................................................... 5 1.4 CURRENT COMMERCIAL APPLICATIONS ......................................... 5 1.5 THE FUTURE .......................................................................................... 6 CHAPTER TWO. FOUNDATIONS OF ACTIVE CONTROL ....................... 9 2.1 PHYSICAL MECHANISMS ..................................................................... 9 2.2 BASIC STRUCTURE OF ACTIVE NOISE CONTROL SYSTEMS ...... 11 2.2.1 Adaptive Feedforward Control ....................................................... 12 2.2.2 Feedback Control ............................................................................ 16 2.2.3 Waveform Synthesis ....................................................................... 18 2.3 CONTROL SYSTEM OPTIMIZATION.................................................. 19 2.3.1 Control Source Output Power and Placement ................................ 21 2.3.2 Influence of Error Sensor Placement .............................................. 25 2.3.3 Influence of Reference Signal Delay and Quality .......................... 27 CHAPTER THREE. THE ELECTRONIC CONTROL SYSTEM............... 31 。。。。。。。。。。。。。。。。。