Model-Based Active Noise Control: A Case Study for a High-speed CD-ROM System

The active attenuation of the airborne noise generated from ahigh-speed CD-ROM system is investigated using model-basedfeedback control methods. A mathematical model of the physicalsystem is developed based on a one-dimensional acoustic ductsystem. The critical system parameter, acoustic terminalimpedance, is estimated using the eigenstructure tests through thesystem identification method. The considered Active Noise Control(ANC) problem is then formulated into a set of standard feedbackcontrol design problems. By using standard control methods, a set of simple feedback controllers aredeveloped for the considered system. The simulation and physicaltest results show a large potential to use standard control techniquesfor a simple, cheap but efficient ANC design and implementation. \copyright 2005 IFAC