The automatic wind ring is an online real-time control system. The controlled objects of the system are several motors distributed on the wind ring.
The cooling air flow sent by the fan is distributed to each air duct after constant pressure in the air ring air chamber, and the motor drives the valve to open and close to adjust the size of the tuyere and air volume, and change the cooling effect of the film blank at the die discharge. In order to control the film thickness, from the perspective of the control process, there is no clear relationship between the film thickness change and the motor control value. The thickness of the film and the valve position of the valve changes nonlinearly and irregularly between the thickness change and the control value. Every time a valve is adjusted Time has great influence on neighboring points, and the adjustment has hysteresis, so that different moments are related to each other. For this kind of highly nonlinear, strong coupling, time-varying and control uncertain system, its precise mathematical model is almost impossible Established, even if a mathematical model can be established, it is very complicated and difficult to solve, so that it has no practical value. Traditional control has a better control effect on a relatively definite control model, but it has a poor control effect on high nonlinearity, uncertainty, and complex feedback information. Even powerless. In view of this, we chose the fuzzy control algorithm. At the same time, the method of changing the fuzzy quantization factor is adopted to better adapt to the changes of the system parameters.
