Two-Dimensional Vibration Intensity Measurement by Wave Composition

概要

論文の詳細を見る
As a method for measuring vibration intensity on a thin plate, the wave composition method is presented. Sensors are arranged on a circle, and accordingly, measurement is easier using this method than the conventional finite difference method in which sensors are arranged in an array. High measurement accuracy is expected because spatial differentiation is performed algebraically by applying Fourier transform. Simulations of estimation error are performed for progressive wave and divergent wave fields. The error is smaller for a smaller measurement circle ; however, when there are measurement errors at sensors(unavoidable in practical measurements), estimation accuracy using a smaller measurement circle is deteriorated by these measurement errors. Larger circle diameters are suitable for robust measurement. Comparison with the conventional finite difference method is performed. The present method shows good accuracy over a wide frequency range.
一般社団法人日本機械学会の論文
1999-12-15