The amount of blade twist is called the pitch angle .

叶片扭曲的量被称之螺旋上升角。

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In order to improve the reliability and robustness of the blade model alignment process, a blade model alignment method which takes into consideration its blend and twist deformation is presented.

针对涡轮叶片的弯扭变形对叶片模型配准定位的不利影响，提出一种考虑弯扭变形的叶片模型配准方法，以提高叶片模型配准的可靠性与鲁棒性。

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The result shows that the model of neural network can predict the effect of blade negative-twist on helicopter vortex-ring state.

计算结果表明，神经网络模型能够准确预测桨叶负扭度对直升机涡环状态的影响。

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