## 抄録

This paper describes a basic theory for modal cluster decomposition on two-dimensional frequency domain and a design method of real-time filter to extract each decomposed modal cluster. At first, the concept of modal cluster decomposition was introduced. Then, an objective function was derived to determine the sensor placement to realize the modal cluster decomposition. The sensor placement is optimized to place each modal cluster on any selected line in two-dimensional frequency domain. By using the two-dimensional Fourier transform of the array sensor outputs, which are measured at selected optimal sensor locations, desired modal cluster decomposition is realized. In order to extract the desired modal cluster on real-time, we also derived a design method of two-dimensional FIR filter. This filter computes the simple summation of current signals for a spatial direction, and hence there is no time delay to extract the signal of a desired modal cluster.

本文言語 | English |
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ページ | 3295-3304 |

ページ数 | 10 |

出版ステータス | Published - 2006 1月 1 |

外部発表 | はい |

イベント | International Conference on Noise and Vibration Engineering 2006, ISMA 2006 - Heverlee, Belgium 継続期間: 2006 9月 18 → 2006 9月 20 |

### Conference

Conference | International Conference on Noise and Vibration Engineering 2006, ISMA 2006 |
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国/地域 | Belgium |

City | Heverlee |

Period | 06/9/18 → 06/9/20 |

## ASJC Scopus subject areas

- 電子工学および電気工学
- 機械工学
- 材料科学（全般）
- 音響学および超音波学
- 凝縮系物理学