CAJ | 학술논문

通过加速度传感器采集到的信号因外界干扰常常会偏离其真实值，甚至出现严重的失真，给后续分析带来了误差甚至错误，因此振动信号的预处理在信号分析中非常重要。信号预处理是对采样信号提取特征量的首要步骤，它直接决定着后续诊断技术的使用效果及精度。对比了传统信号预处理方法和EM D去除冲击振动信号失真的有效性。结果表明，经过EM D处理后的信号质量有明显的改善，为后续的信号分析工作奠定基础。
통과가속도전감기채집도적신호인외계간우상상회편리기진실치，심지출현엄중적실진，급후속분석대래료오차심지착오，인차진동신호적예처리재신호분석중비상중요。신호예처리시대채양신호제취특정량적수요보취，타직접결정착후속진단기술적사용효과급정도。대비료전통신호예처리방법화EM D거제충격진동신호실진적유효성。결과표명，경과EM D처리후적신호질량유명현적개선，위후속적신호분석공작전정기출。
The signal collected by acceleration sensor often deviates from its true value ,or even serious distortion ,which brings error to the subsequent analysis . Therefore the pretreatment of vibration signal in the signal analysis is very important . Signal preprocessing is the first step of extracting characteristic information from sampled signals , it directly decides the effect of subsequent diagnostic technique and its accuracy .This article compares the effectiveness of traditional signal pretreatment method and EMD in removing the impact vibration signal distortion .The results show that the signal treated by EMD is improved ,which lays the foundation for the subsequent signal analysis work .