分析了HHT中Hilbert能量谱的原理；研究了瞬时频率谱中端点效应产生的原因，将ARMA模型应用于Hilbert能量谱计算中，以旋转机械振动信号为对象，运用所提的方法对HHT中典型的本征模式函数进行仿真实验；通过与传统方法比较，证明它可以有效地改进端点效应，优化Hilbert能量谱。

The Hilbert energy spectrum's principle in HHT is analyzed in the paper; Aimed to solve the end problem in the instantaneous spectrum figure, the cause is researched and ARMA model is introduced in the calculation of Hilbert of HHT. By the simulation of several typical IMFs about vibration signal of rotating machine, and comparing with the conventional methods, the advanced method is proved to be able to improve the end problem effectively and optimize the Hilbert energy spectrum greatly.