叶栅风洞控制方法分析与实现

Analysis and Realization of Control Method for Cascade Wind Tunnel

摘要:

为解决叶栅风洞气罐容量小气源压力下降快给流场控制带来的难题,采用动态变参数和积分分离PID控制算法实现了叶栅风洞流场快速稳定和目标压力高精度控制目的；以调压阀后压力为控制点,采用叶栅入口压力误差值对控制点压力进行修正的方法,解决了常压和增压试验中控制滞后问题；变参数PID控制和选用具有确定对应关系控制点并对实际误差进行修正的方法,对小型暂冲风洞高精度压力控制和滞后问题的解决具有一定借鉴意义。

Abstract:

To solve the flow field control problem that the small capacity of tank and the pressure drops quickly brings in the cascade wind tunnel, the flow field control, the dynamic variable parameter and integral separation PID control algorithm was given. The algorithm can achieve a rapid flow field stability and high precision control of pressure in the cascade wind tunnel. The control delays problem in the atmospheric and pressurization test was solved by using the method which uses the inlet pressure error value of cascade to correct the pressure behind pressure regulator. The result indicates that the variable parameter PID control and the choice of control point having a defined correspondence to correct the actual error have significance for high precision pressure control and hysteresis in the small temporary red wind tunnel.