Adaptive Control with Time Delay on the Acoustic Field in a Duct

• Main Authors: Ping-Chung Fu, 傅秉中
• Other Authors: An-Chyau Huang
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/49mnbj

碩士 === 國立臺灣科技大學 === 機械工程系 === 106 === In this paper, we focus on the active noise reduction of a one dimensional acoustic field in a duct which can be considered in two types by existence of the time delay. Adaptive controllers are constructed for these two types respectively based on the knowledge of the gain parameter and noise signal. For the case when the time delay to be unavailable, the Padé approximation is used to represent the unknown time delay under the support of the function approximation based adaptive control strategies. Rigorous mathematical justifications are given for the proof of closed loop stability as well as the boundedness of the internal signals. Computer simulation and experiment results are presented to test the efficacy of the proposed schemes.