Introduction to Automatic Shutdown System for Flutter Test of High Speed Wind Tunnel

This paper introduces an automatic shutdown system for model protection during the flutter test in high speed wind tunnels. This automatic shutdown system can be used to determine any unsafe condition through model flutter signals before triggering shutdown of wind tunnels, solving problems of delayed response and mistakes happen during manual measurement of subcritical state of model flutter. The reliability and effectiveness of this system have been proved good via wind tunnel tests, hence the possibility of damage to the model caused by flutter during the flutter test of high speed wind tunnels can be decreased.