Design and Implementation of a Fuzzy Control System for a ST2 Supersonic Wind Tunnel Nozzle

An automatically controlled variable converging-diverging supersonic nozzle with high dependability is required for wide range of Mach numbers in a supersonic wind tunnel. In this work, the performance of a converging- diverging nozzle of the ST2 supersonic wind tunnel was evaluated and analyzed. Based on our results, an automatic control system for adjustment of the nozzle was designed and implemented. Then, a fuzzy control system was used to optimize the wind tunnel’s performance and behavier. The results show that, it is supprior in speed, precision, stability, and reliability. In addition, the new system has caused better wind tunnel overall performance, enhancing its reliability and reducing its cost.