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http://hdl.handle.net/10397/13809
Title: | Orthogonal adaptation for multichannel feedforward control | Authors: | Yuan, J | Issue Date: | 2006 | Publisher: | Acoustical Society of America | Source: | Journal of the Acoustical Society of America, 2006, v. 120, no. 6, p. 3723-3729 How to cite? | Journal: | Journal of the Acoustical Society of America | Abstract: | In active noise control, it is desired to generate destructive interference by model-independent control. This is possible for single-channel systems to which a recently proposed method, called orthogonal adaptation, is applicable. In this study, the new method is extended to multichannel systems. An important issue is how to optimize a feedforward controller in the minimum H2 norm sense. In practice, secondary paths of some multichannel systems may be nonminimum phase. It is a difficult problem to design H2 feedforward controllers for multichannel systems with nonminimum phase secondary paths. The problem is solved analytically here with the best achievable, a practical and an economical solution. A recursive least squares algorithm is presented for online identification of multiple paths without persistent excitations. These solutions make it possible to implement noninvasive mode-independent controllers for multichannel systems. Experiment results are presented to verify the analytical results. | URI: | http://hdl.handle.net/10397/13809 | ISSN: | 0001-4966 | EISSN: | 1520-8524 | DOI: | 10.1121/1.2358012 |
Appears in Collections: | Journal/Magazine Article |
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