Research and realization on the control strategies of blow-down supersonic wind tunnel

Abstract

As the characteristics of nonlinear, time-varying and big time delay in the ejecting blow-down supersonic wind tunnel, it will occur the interference and coupling between the total pressure control system and ejector control system in the ejection test mode. In order to meet the requirements of high control accuracy and the stable velocity of convergence of wind tunnel tests, the control strategies for the startup of wind tunnel and stablity of flow field under different testing conditions are made deep study and successful application during the wind tunnel tests.