CAJ | 학술논문

针对采集转子振动信号时信号中往往夹杂着噪声干扰的问题，提出了一种自寻优阈值的小波包降噪方法。该方法可对不同振动信号自寻优地设置阈值，且阈值的选取与所研究的信号有关而与信号长度无关；并根据采样定理计算不同转子转速对应的小波包分解的最低层数。对多种信号进行的降噪研究表明，该方法可有效降低转子振动信号中的噪声干扰。
침대채집전자진동신호시신호중왕왕협잡착조성간우적문제，제출료일충자심우역치적소파포강조방법。해방법가대불동진동신호자심우지설치역치，차역치적선취여소연구적신호유관이여신호장도무관；병근거채양정리계산불동전자전속대응적소파포분해적최저층수。대다충신호진행적강조연구표명，해방법가유효강저전자진동신호중적조성간우。
Since the rotor vibration signal acquisition often mingled with the noise interference, a self-opti-mized threshold wavelet packet denoising method was proposed. Self-optimized threshold, which was linked to the signal itself rather than the length of signal, was set for different vibration signals. And the low-est layer of wavelet packet was decomposed according to the rotor speed. The research results show that, this method can reduce the noise disturbance in rotor vibration signal effectively, and has certain applica-tion value.