【摘要】 研究了在工程中如何通过算法来实现利用Hilbert变换提取信号的瞬时特征。深入地分析了如何利用数值微分法提高提取瞬时频率特征的精度。最后,给出了一种可行的算法,并通过实验验证了这种方法可以在工程中有效地提取信号的瞬时频率特征。更多还原

【Abstract】 Studies how to extract the instantaneous characteris tics of the signals based on Hilbert transform by means of algorithms in engineering. T hen it analyzes deeply how to extract the instantaneous frequency further accura tely based on numerical differential. At last, a feasible method is put forward, and it can be effectively used in the engineering to extract the instantaneous frequency of the signals proved by experiments.更多还原