Internal-model Based LQG/Hinf Design of Active Noise Controllers for A One Dimensional Acoustic Duct System

• Main Authors: Luo, Zi-Liang, 羅子良
• Other Authors: Jong-Yih Lin
• Format: Others
• Language: zh-TW
• Published: 1998
• Online Access: http://ndltd.ncl.edu.tw/handle/30046910325572740487

碩士 === 國立中興大學 === 機械工程學系 === 86 === In this thesis, we study active noise control for a one- dimensional acoustic duct system. A real-state-space model of an acoustic duct system developed in [24] is used to design active noise controllers and do computer simulation. A design method of linear quadratic gaussian control with a performance bound incorporating with an internal model principle (LQG/Hinf+IM) is developed to design active noise controller to generate repetitive control signal so that noise of specific (target) frequency in the acoustic duct can be attenuated. Computer simulation shows that the designed LQG/Hinf+IM controller can achieve perfect noise rejection at the target frequency and can acquire the desired robustness property of tolerating the uncertainty in the target frequency. Experimental results also demonstrate the robust control performance and indicate the feasibility of the proposed designed method.