Study on Development of Diagnosis System of Machines by Using Sound Informations

点击翻译按钮获取中文摘要

By the tendency of both high power and the control by computer of the machine system, an accident causes larger extent of damage. It is, therefore, desired to diagnose the machine system always or periodically. In this research, the diagnosis system by using sound informations instead of vibratory informations was developed to diagnose and restore the machine system. The following main results were obtained.(1) The data-base which maintains the characteristics of abnormal sound and furthermore restricts the amount of data with respect to the original sound waves was constructed.(2) By analyzing the sound pressure, acoustic intensity, and sound spectra, the sound parameters which characterize the abnormality of machine system were obtained.(3) The steady state and transient sound fields were visualized. by use of the three dimensional acoustic intensity.(4) By using the active noise control or the restoring technique, the diagnosis system of prototype was developed.