铝锭铸造机铝液流量控制器的研究与设计

Study and design of aluminum melt flow controller on aluminum ingot casting line

针对铝锭铸造过程为非线性、时变过程,不容易建立精确的数学模型,基于模糊控制算法设计铝液流量控制器,给出模糊控制器结构、搭建方法及其控制流程图。实践验证,与普通PID控制比较,能快速进入恒液位稳定区,过程超调量很小,控制系统大大改善了响应速度、时滞等性能,为流量是采用浮标直接控制或浮标-杠杆控制铝锭铸造设备改造提供参考。

On casting line the casting flow value of aluminum melt is nonlinearity and time-variety so it is difficult to establish an accurate mathematical model for flow controlling.The flow value controller and flow controlling chart have been designed by fuzzy principle.The practice proves that the new designed controller can quickly make the melt level steady and constant.and the over-flow adjusting value is smaller comparing with proportional-integral-differential controller（PID）.So the response rate and time-delay are improved greatly.It can provide a reference for remake the buoy or buoy-lever flow controllers on aluminum ingot casting line.