Title: | A modified H-2 feedforward active control system for suppressing broadband random and transient noises |
Authors: | Bai, M Chen, H 機械工程學系 Department of Mechanical Engineering |
Issue Date: | 21-Nov-1996 |
Abstract: | Three feedforward active noise control algorithms based on H-2, H-infinity, and modified H-2 optimal model matching principles are investigated in this study. The first two methods provide significant attenuation for broadband random noises. However, the H-2 and H-infinity methods generally result in high-gain controllers at high frequencies, which calls for some truncation measures in the frequency domain. The third method effectively eliminates the high-gain problem of the ordinary H-2 and H-infinity algorithms. In addition, this method is guaranteed to result in a causal and stable controller which is crucial in practical implementation. The algorithms are coded into controllers by using a floating-point digital signal processor. The experimental results show significant attenuation for stationary broadband random noises as well as transient impact noises in a duct. (C) 1996 Academic Press Limited |
URI: | http://dx.doi.org/10.1006/jsvi.1996.0558 http://hdl.handle.net/11536/149363 |
ISSN: | 0022-460X |
DOI: | 10.1006/jsvi.1996.0558 |
Journal: | JOURNAL OF SOUND AND VIBRATION |
Volume: | 198 |
Begin Page: | 81 |
End Page: | 94 |
Appears in Collections: | Articles |