In recent decades, the rapidly development of wind energy in China and the increasing of size and complexity of wind turbine have requested the improvement in wind turbine systematic design technology. A reasonable systematic dynamic model is an important part for systematic design of MW-class wind turbine. In structural dynamic model, the flexibility of blade and tower is represented by presumed mode shapes. In this paper, based on presumed mode shape method, the structural dynamic equations of wind turbine were constructed. Along with the wind field model, the wind turbine aeroelastic systematic dynamic model was constructed. Using the model, the deflections and load of blade, low speed shaft torque of a 1.5MW wind turbine have been calculated. Therefore, the construction of wind turbines systematic dynamic model has an important significance for the development of wind systematic design and manufacturing capacity.
For the development of Chinas cotton picker, this paper focuses on researching the level of spindle-type cotton pickers principle and the law of motion. It established overall model of motion simulation and got the contour in the motion simulation module, then extract the line data and make data processing on the basis of the MATLAB, making reconstruction in the three-dimensional modeling software through applying function expression derived from Matlab. In the motion simulation module, getting the displacement, velocity and acceleration curve charts and discussing their analysis, so as to provide the well-reference value for research law of motion in the pick roller of cotton picker.
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