英语语法分析

The lateral-direct aerodynamic data of a SUAV without any aileron with different dihedrals and vertical-tail areas were obtained through an aerodynamic estimation method.

通过理论计算，定量地研究了小型无副翼电动无人机的横航向操稳特性，对不同机翼上反角和垂尾面积进行了横航向模态特性计算与分析。