The two schemes those are the hydraulic control and the electromotor control of the pitch-controlled system were developed and a high pressure redundancy electro-hydraulic proportional pitch-controlled design was put forward.

• 具体设计了变桨距机构液压控制方案和电机控制方案，并提出了高油压冗馀式电液比例变桨距机构的设计思路。