Adaptive Hybrid Active Noise Control Based On Robustly Controlled Secondary Path

• Main Author: 賴銘相
• Other Authors: 林忠逸
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/31484546693454349001

碩士 === 國立中興大學 === 機械工程學系 === 92 === In this thesis, we study active noise control (ANC) based on a robustly feedback-controlled secondary path. A model of secondary path of an acoustic duct system is first utilized to form a mixed sensitivity problem that is consequently solved by using an H design method. As a result, a robust feedback controller for the secondary path is obtained. Based on this controlled secondary path, we further develop ANC controllers of adaptive FIR filters with a filtered-X LMS algorithm. These new ANC controllers are expected to gain better effectiveness of noise reduction. Both computer simulations and experiments are carried out to demonstrate noise reduction performance of the proposed approach for broadband noise.