vtol aircraft meaning in English

垂直起落飞机
垂直起落机

First steps taken in quest to prove backpack vtol aircraft
探索背包式垂直起落飞行器迈出了第一步
Secondly , we introduce the theory that flat systems , an important subclass of nonlinear systems introduced via differential algebraic methods , are defined in a infinite dimensional differential geometrical framework . utilizing this method , the control system of the vtol aircraft becomes a linear control system . finally , we introduce the theory that is found by my teacher , wanghong professor
3 、应用平坦性分析方法和整体微分几何方法分别分析了pvtol飞机在其起飞过程时的控制律，得到了该系统的整体化方程，指出了该系统是能控能观的，并且指出该系统是平坦的控制系统，可以通过动态状态反馈和适当的坐标变换使之变成线性系统。