If the wave filter is applied, the high frequency effect of the wave disturbance can be reduced greatly and the control performance can be improved.

The short wave disturbance did not match the undulation of the wind field, and the characteristics of its phase propagation were similar to those of gravity waves.

The results show that the excited long wave disturbance could first obtain energy from the stratified heterogeneity of basic state, then from the interactions among non-linear waves.