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2m×2m超声速风洞是一座大型引射下吹式风洞,总压控制具有非线性、时变、大滞后特性,引射器和主调压阀同时运行时存在一定的耦合特性。为了满足风洞试验对总压控制精度和收敛速度的要求,对不同马赫数试验条件下,风洞流场启动和串级智能稳定控制策略进行了深入研究,并在调试过程中对控制方法进行了验证,控制结果达到风洞指标要求。
The 2m × 2m supersonic wind tunnel is a large-scale down-blowing wind tunnel. The total pressure control has nonlinear, time-varying and large hysteresis characteristics. There is a certain coupling characteristic between the ejector and the main pressure regulating valve. In order to meet the requirement of wind tunnel test for total pressure control accuracy and convergence speed, the wind flow field start-up and cascade intelligent stability control strategy under different Mach test conditions were studied in depth and the control method was carried out in the debugging process Verified, the control results meet the requirements of wind tunnel indicators.