Virtual Design Of Pitch Angle Transmission And Control System

This paper studies virtual design of pitch angle transmission and control system of wind turbine. Pitch angle control system can change pitch, accordingly regulate the rotational speed and output power by adjusting blade incidence of wind-driven device. Compared with fixed-pitch turbine, the variable-pitch have the virtues: higher power wind coefficient, stable output power over rated power, safety and higher reliability etc..Based on aerodynamics and blade elements theory, the paper expatiated the principle of pitch angle control; analyzed detailed the spatial-mechanism of transmission device; designed its structure .which can implement comparatively complicated movement by parts as simple as possible; built math model and finished dynamic simulation using MATLAB and display the analytical result .The virtual design of variable-pitch transmission is one of the focal point of the paper. By use of Virtual Prototype Technology and computer simulation, drive mechanism was design rapidly and exactly, which include parametric modeling of three-dimension solid of mechanism by PRO/E, movement simulation and kinematical analyses using ADAMS, processing and visualizing of the result.The whole design was test, modified and completed.Computer control of Variable-pitch device was also designed and discussed in this paper, which include putting forward project of control system, design of soft and hardware, selecting control algorithm, building system PID controller math model and simulating. According to program which be used to control pitch angle, driver mechanism implement the function of regulating the rotational speed and dynamotor output power.