PROBLEM TO BE SOLVED: To provide a wind turbine generator, its control method and a method for controlling the pitch-angle of a blade in which fluctuating load of a pitch angle-driving mechanism is reduced by improving control characteristics of the blade pitch-angle, and occurrence of ...
美 英 un.桨叶角 英汉 un. 1. 桨叶角
When tensile force F develops in the barrel portion due to centrifugal force resulting from rotation of the blade, both opening ends of the barrel portion twistedly rotate due to actions of the filamentary bodies. Thus, it follows that the pitch angle of the blade connected to the first ...
叶片间距指数角。
This invention relates to a variable pitch propeller for airplanes or the like and more particularly to such a propeller in which the pitch angle of the blades is controlled by fluid operated mechanism. It has been proposed heretofore to... SM Allred - US 被引量: 10发表: 1938年 Design, ...
When the turbine operates at a low tip-speed ratio λ, which is the ratio between the blade velocity ΩR, and the wind velocity U∞, the blades perceive significant amplitude changes in the angle of attack and relative wind velocity (Fig. 1). These varying flow conditions can give rise ...
Fan through the rotor mechanical energy applied to the gas pressure and the rate of energy change what survives of the industrial system, the fluid machine is a major component. Axial flow fan used in this study, the blade and hub are separate blades can adjust the pitch angle is constructed...
2.In the case of the consideration of angle of attack,propellerpitch angle,yawing rotation,gravity and moment of inertia,a mathematical model based on static analysis is put forward,which is used to study loads of the blade bearing system of a wind turbine.在考虑攻角、桨距角、偏航运动、重力...
by controlling the pitch angle of the blades [1]. In general, these systems consist of a hydraulic pump that supplies the oil flow, which is then routed by a set of control valves to a linear actuator attached to the blade (in one or two anchor points on the blade root) and its ...
Adaptive backstepping controller for altitude control of a small scale helicopter by considering the ground effect compensation This type of system has only two degrees of freedom, including helicopter altitude and collective pitch angle of blade. A vertical dynamics motion model ... TK Roy,AA Suman...