Wind tunnel experiment method and system for establishing aerodynamic model

The invention relates to the technical field of wind tunnel experiments, and provides a wind tunnel experiment method and system for establishing an aerodynamic model, and the method comprises the steps: applying a training excitation signal to an aircraft; acquiring sensor data of a sensor to obtain a training sample; training the OS-ELM based on the training sample to obtain an aerodynamic model; and verifying the generalization ability of the aerodynamic model. The aerodynamic force model established through the method can have good prediction capacity on aerodynamic force generated after excitation is applied to the aircraft, different aerodynamic force models can be established according to different aerodynamic coefficients, and multi-azimuth prediction is achieved. The aerodynamic model obtained through training under small-amplitude excitation also has a good prediction effect on aerodynamic data of large-amplitude excitation, so that the aircraft can obtain a global aerodynamic model with good precis