1103 トラクタキャビン内騒音に対するアクティブノイズコントロールに関する研究

概要

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Noise in the cabin of agricultural tractors is one of the most important problems from a viewpoint of operator's comfort, and its reduction has been required. ANC systems are more effective compared to passive techniques in the low frequency region. The aim of this study is to develop a compact and effective ANC system applied to the noise reduction in the cabin of agricultural tractors. An ANC controller has bee designed with four algorithms, namely Filtered-X LMS (FX), Constraint Filtered-X LMS (CFX), Multiple Error Filtered-X LMS (MEFX), Constraint Multiple Error Filtered-X LMS (CMFX). Laboratory experiments were carried out using a dummy noise source. The ANC was found to be capable of reducing noise sufficiently in the space around operators head and satisfactory in the convergence speed. Based on the laboratory experiments, the ANC system was applied to the cabin of a tractor being found to be effective in practical use.
社団法人日本機械学会の論文