考虑到复合多尺度排列熵是多尺度排列熵的改进，且复合多尺度排列熵主要依赖

Considering that the compound multi-scale permutation entropy is an improvement of the multi-scale permutation entropy, and the compound multi-scale permutation entropy mainly depends on the calculation of the multi-scale permutation entropy, according to the literature, this paper sets the delay time to N = 1024, for m = 4- 7. The scale factor is s = 20, and the vibration signals of 4 different working conditions are respectively VMD decomposed to obtain 7 BLIMF. In FIG. 7, BLIMF1 is used to calculate different m separately, and the average value is taken 10 times. The change trend of scale factor s with CMPE is shown in Figure 4.

考虑到复合多尺度排列熵是多尺度排列熵的改进，且复合多尺度排列熵主要依赖于多尺度排列熵的计算，根据文献，本文将延迟时间设为 ,N=1024，对m=4-7，尺度因子为s=20, 对4种不同工况的振动信号分别进行VMD分解，得到7个BLIMF,图7中采用BLIMF1对不同的m分别进行计算，取10次的平均值。尺度因子s随CMPE的变化趋势如图4所示。

Considering that the composite multiscale arrangement entropy is an improvement of the multiscale arrangement entropy, and the composite multiscale arrangement entropy mainly depends on the calculation of the multiscale arrangement entropy, according to the literature, this paper sets the delay time as, n = 1024, M = 4-7, scale factor as s = 20, VMD decomposition is carried out for four vibration signals under different working conditions, and seven blimf are obtained, In Figure 7, calculate different m with blimf1, and take the average value of 10 times. The change trend of scale factor s with cmpe is shown in Figure 4.<br>