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• In this paper, the mathematical model of DFIG and variable pitch system is established.

本文分别分析馈发电机桨距系统的数学模型

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• The good or bad of variable pitch system affects wind generating set efficiency, safe operation and stable operation to a large extent.

桨距系统好坏很大程度地影响风力发电机组的效率安全运行稳定运行。

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• First, wind turbine aerodynamics and variable pitch control process was discussed to provide theoretical studying basis for studying of the system design and control strategy.

首先风力空气动力学桨距控制过程进行了探讨，系统设计控制策略的研究提供理论基础

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• In this paper, the research for the control system begin with studying controller of variable pitch control system.

本文控制系统控制器研究切入点，控制系统展开研究

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• According to the controlling requirement of megawatt wind driven generator with variable propeller pitch of horizon axis, the hydraulic control system of a variable propeller pitch is designed.

针对兆瓦级水平风力发电机控制要求设计了变桨距液压控制系统

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• First, traditional PID variable variable pitch control system and conventional fuzzy variable pitch control system are established.

本文首先建立了PID控制系统常规模糊变桨距控制系统。

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• The design of servo system for pitch attitudes of a mine hunting sonar array was made using frequency domain control and variable structure control respectively.

本文雷艇声纳俯仰角姿态伺服系统分别进行领域控制设计结构控制律的设计。

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• Therefore, to carry out research on the variable pitch control system of wind turbine and its drive system has important significance.

因此开展风力机变桨距控制系统及其驱动系统研究具有重要意义

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• Therefore, to carry out research on the variable pitch control system of wind turbine and its drive system has important significance.

因此开展风力机变桨距控制系统及其驱动系统研究具有重要意义

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