Flexible blade aeroelastic stability evaluation method and system based on ARX model

The invention discloses a flexible blade aeroelastic stability evaluation method and system based on an ARX model, and relates to the technical field of wind power. The method comprises the steps that an ARX model is established based on system identification, and a continuous state space equation of the aerodynamic system is obtained based on the ARX model; constructing an airfoil structure motion model based on the flexible blade structure, and obtaining a continuous state space equation of a structural dynamics system based on the airfoil structure motion model; obtaining a coupled system state space analysis model based on the aerodynamic system continuous state space equation and the structural dynamics system continuous state space equation; and carrying out aeroelastic stability evaluation based on the coupled system state space analysis model. According to the method provided by the invention, the aeroelastic stability of the blade can be accurately determined, so that the safety of the blade of the w