Model-based Active Noise Control: a Case Study for a High-speed Cd-rom System

The active attenuation of the airborne noise generated from a high-speed CD-ROM system is investigated using model-based feedback control methods. A mathematical model of the physical system is developed based on a onedimensional acoustic duct system. The critical system parameter, acoustic terminal impedance, is estimated using the eigenstructure tests through the system identification method. The considered Active Noise Control (ANC) problem is then formulated into a set of standard feedback control design problems. By using standard control methods, a set of simple feedback controllers are developed for the considered system. The simulation and physical test results show a potential to use standard control techniques for a simple, cheap but efficient ANC design and implementation. Copyright c ©2005 IFAC