Modal decomposition and modal cluster decomposition on two-dimensional frequency domain (real-time filtering of each modal cluster)

Yuichi Matsumura, Naoki Hosoya

Research output: Contribution to journalArticle

Abstract

This paper examines a method for the design of a real-time filter for extrcating a desired modal cluster, which is decomposed on a two-dimensional frequency domain. At first, the realization method of modal cluster decomposition was revisited. Then, in order to extract the desired modal cluster on real-time, we derived a design method of a time domain filter based on a theory for 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. As a numerical example, it was shown that the real-time filtering of the desired modal cluster can be successfully realized with low computational cost and without time delay.

Original languageEnglish
Pages (from-to)2703-2709
Number of pages7
JournalNihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
Volume73
Issue number10
Publication statusPublished - 2007 Oct
Externally publishedYes

Fingerprint

Time delay
Decomposition
FIR filters
Costs

Keywords

  • Cluster filter
  • Filter
  • Measurement
  • Modal analysis
  • Modal filter

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

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AB - This paper examines a method for the design of a real-time filter for extrcating a desired modal cluster, which is decomposed on a two-dimensional frequency domain. At first, the realization method of modal cluster decomposition was revisited. Then, in order to extract the desired modal cluster on real-time, we derived a design method of a time domain filter based on a theory for 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. As a numerical example, it was shown that the real-time filtering of the desired modal cluster can be successfully realized with low computational cost and without time delay.

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