Supersonic wind tunnel total pressure control based on dynamic matrix control

Improving the accuracy of total pressure control is an important research direction for the control of air flow fields in supersonic wind tunnels. Predictive control is based on the prediction of the future time control deviation to optimize the control rate, and has the ability to achieve high precision control of total pressure. Therefore, in this paper, taken the transient supersonic wind tunnel as the object, the dynamic matrix control in the predictive control method is used to achieve high-precision control of total pressure. To solve the problem that the step response model is inaccurate due to the drop of air source, the model compensation method is used to modify the measured step response curve. The dynamic matrix control algorithm with the modified model is applied in the wind tunnel simulation system to improve the total pressure control accuracy of the wind tunnel. This paper lay a theoretical foundation for the application of predictive control method in a supersonic wind tunnel test site.