The Applications of the Observer-Based Beamforming Algorithm for Aeroacoustics
Beamforming based on microphone arrays is widely used in aerospace industry for localizing the distribution of noise sources of an aircraft. However, the conventional beamforming computations can only be conducted off-line after the preparations of all of the sampling data, thus cannot be used as a real-time algorithm. In addition, the performance of conventional beamforming deteriorates when there exists coherent background noise. An alternative algorithm is proposed to solve these problems. The algorithm has a similar form to a state observer in control theory, while operates in the frequency domain. The derivations and various validations of this algorithm is included in this work. It is shown that this so-called observer algorithm not only holds the real-time capability, but can also resolve the coherent restriction between background noise and the signal of interest during the iterations. With the help of this algorithm, any testing defects can be revealed instantaneously and corrected on site.
State Observer Aeroacoustics Beamforming
Long Bai Chi Xu Xun Huang
Department of Mechanics and Aerospace Engineering,College of Engineering,Peking University,Beijing 1 State Key Laboratory of Turbulence and Complex Systems, Department of Mechanics and Aerospace Engine
国际会议
2011 China Control and Decision Conference(2011中国控制与决策会议 CCDC)
四川绵阳
英文
3750-3754
2011-05-23（万方平台首次上网日期，不代表论文的发表时间）