マルコフチェーン・モンテカルロ法を用いた振動騒音伝達率レベルのベイズ推定方法の基礎検討

抄録

Operational transfer path analysis is important in considering the countermeasure structure of the operating actual product for noise and vibration problems, but in the conventional method based on the Least Square Method (LSM), there are some problems such as reliability of the obtained results cannot be discussed. Therefore, we studied a method of Bayesian estimation of the FRF level as a decibel value and produced a trial program to calculate by the Markov Chain Monte Carlo (MCMC) method, then verified the accuracy with the 2-input 1-output model. As a result, it was confirmed that the FRF level can be estimated with the reliability given as the probability distribution, and the expected value can be estimated with an error of 1.1 dB with respect to the true value of the preset FRF level.