短周期风洞叶栅气动状态调节与控制

Aerodynamic State Regulation and Control of Cascade in Short Duration Wind Tunnel

为获得实验中维持叶栅气动状态稳定的控制方法,研究短周期叶栅风洞气动状态同阀门开度的关系,根据实验的阀门流量特性数据计算阀门开度,准确调试出需要的实验状态。将调压阀流量特性数据作为专家知识同传统PID(比例积分微分)方法相结合,得到实验中维持叶栅气动状态稳定的有效方法,该方法能自动计算控制参数并精确控制叶栅气动状态,而且具有计算量小、压力稳定快以及不会出现震荡的优点。

In order to obtain an effective method maintaining the cascade aerodynamic state during the experi ment. The relations of the cascade aerodynamic state and the openings of the valves in short duration wind tunnel are studied. Using the calculated valves＇ openings according to the valves＇ discharge characteristic data, the required state can be reached. By combining the pressure regulating valve＇s discharge characteristic data with the traditional Proportional Intergral Differential（PID）method, an effective method maintaining the cascade aerodynamic state during the experiment is given. The new method can automatically compute the control parame ters and precisely control the cascade aerodynamic state, while the calculation amount is small and stable pressure state can be achieved rapidly and monotonously.