【摘要】 在仿真基础上,对旋转机械调频调幅振动信号EMD分解去噪效果进行了分析,总结出了EMD分解的SD值大小对信号去噪效果的影响,提出了SD值过小虽然可以增加含噪信号迭代次数,最大程度去噪,但会破坏原信号的局限性。论证了采用适当SD值的EMD分解与滤波结合能有效地去噪并提取特征信号。更多还原

【Abstract】 Based on the simulation,this paper makes an analysis on EMD decomposition de-noising effect based on AMFM signal. It summarizes the impact of SD value of EMD decomposition on the signal de-noising effect,and presents that small SD value could increase the number of iterations,but the original signal would be destroyed. This paper demonstrates that the EMD decomposition of appropriate SD value in combination with filtering could effectively reduce noise and select characteristic of signal.更多还原