標題: Analysis and DSP implementation of a broadband duct ANC system using spatially feedforward structure
作者: Bai, MR
Lin, YJ
機械工程學系
Department of Mechanical Engineering
公開日期: 1-Apr-2001
摘要: The active control technique for broadband attenuation of noise in ducts, using spatially feedfoward structure. is investigated from the viewpoints of both acoustic analysis and exists an ideal controller for this problem. The ideal controller is a function of the finite control engineering. According to the previous work by Munjal and Eriksson [1], there source impedance and is thus independent of the boundary conditions. Despite the simplicity the ideal controller cannot be practically implemented due to the difficulty of calibration of electro-mechanical parameters. To overcome the problem, the controller is implemented via an equivalent formulation modified from the controller originally proposed by Roure [2]. The modified controller is implemented on a DSP platform, using a FIR filter, an IIR filter and a hybrid filter. The experimental results showed that the system achieved 17.2 dB maximal attenuation in the frequency band 300 similar to 600 Hz. Physical insights and design considerations in implementation phase are also discussed in the paper.
URI: http://hdl.handle.net/11536/29756
ISSN: 1048-9002
期刊: JOURNAL OF VIBRATION AND ACOUSTICS-TRANSACTIONS OF THE ASME
Volume: 123
Issue: 2
起始頁: 129
結束頁: 136
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