Vertical axis wind turbine blade based on shape memory alloy active driving control

The invention provides a vertical axis wind turbine blade based on shape memory alloy active driving control, a vertical axis wind turbine comprises an airfoil blade, and a driving mechanism for supporting and driving a flap to deflect is arranged at the joint of the blade and the flap. When the blade rotates to an upper wind area, an electromagnetic field is applied to the shape memory alloy on the lower surface of the blade to drive the flap to deflect towards the upper surface; when the blade rotates to the windward area, an electromagnetic field is applied to the shape memory alloy on the upper surface of the blade to drive the flap to deflect towards the lower surface. According to the active control mode, the shape memory alloy is heated to change the shape of the shape memory alloy to drive the flap to deflect, the flow field of the wing-shaped trailing edge is effectively improved, the rotating resistance of the blade is reduced, and the working efficiency of the vertical axis wind turbine is effectiv