Robust identification and feedback design: An active noise control case study

In this paper, a systematic control-oriented robust identification procedure which produces a parametric/nonparametric set of models is applied to a duct, in order to design a feedback active noise control (ANC) based on robust analysis and control. In addition, practical problems encountered in applying such a robust identification and feedback control approaches to ANC are pointed out. These are mainly derived from the compromises between identification and control, performance and robustness, the inherent limitations of feedback when applied to ANC, model and controller order, and implementation issues. Theoretical and experimental results on a real duct are compared using two different noise sources, a speaker and a fan.