The amount of blade twist is called the pitch angle .

叶片扭曲的量被称之螺旋上升角。

The first type is available when the pitch angle is small.

当俯仰角很微小的时候，使用第一种方式较为方便。

The pitch control is attained by the measurement of the pitch angle.

针对俯仰回路，利用测量的俯仰角实现了俯仰回路姿态控制；

The main blades pitch Angle is controlled by the up and down movements of the swashplate.

大桨的螺距角度是由倾斜盘的上升和下降动作控制的。

This paper studies virtual design of pitch Angle transmission and control system of wind turbine.

本文针对风力发电变桨距传动及控制系统进行了研究。