The Visualization of Vibration and Noise of The Rotary Compressor during One Cycle of Crank Shaft by use of Short Time Fourier Transform

STFT를 이용한 로터리 압축기 크랭크 1회전 동안의 실시간 진동소음의 가시화

There have been many studies to visualize the vibration and noise of rotary compressor. Most of these studies assumed that the signal is stationary and the time-averaged signal is used for visualization. However, the noise and vibration signals generated during one cycle of crank shaft vary continuously. In this paper, the noise and vibration of rotary compressor which vary continuously are visualized by short time fourier transform method. The location of source and the transfer path of vibration and noise at arbitrary frequencies, which can not be visualized by averaged signal, can be visualized clearly.