ANC systems without a secondary path model using perturbation method - verification in an actual system

摘要

In this paper, we apply an ANC system using the perturbation method to an air-duct and verify the performance of the system. This ANC system has an advantage that a secondary path model (an estimation of the secondary path) is unnecessary compared with conventional systems using filtered-x LMS algorithm. Therefore, this system will be able to control noise stably in environmental variation, because this system does not have a modeling error which causes system instability. We have already demonstrated the effectiveness of this system through some simulations, we consequently verify the effectiveness in an actual system. As a result, we demonstrate that the ANC system using the perturbation method is effective in long time control involving the environmental variation.