An adaptive feedback system for the active control of sound and vibration is investigated. The controller combines adaptation for minimum variance of the error, to achieve optimal H2 performance for every disturbance, and H∞ robust stability measures, to account for uncertainties in the plant. An Internal Model Control configuration is used, with a fixed FIR filter for the plant model, and an adaptive FIR filter for the controller. The adaptation is performed using the Filtered-x LMS algorithm, which is modified so that it converges to a robust controller. The considerations for using this design in active control are discussed, and implementation results on active noise reducing headphones are presented.
|Number of pages||5|
|Journal||IEE Conference Publication|
|Issue number||427 /2|
|State||Published - 1 Jan 1996|
|Event||Proceedings of the 1996 UKACC International Conference on Control. Part 1 (of 2) - Exeter, UK|
Duration: 2 Sep 1996 → 5 Sep 1996