纤维素硝酸酯真空热脱水工艺含水量多值逻辑控制系统

Residual Moisture Content Multiple-Value Logic Control System for Vacuum-Pyroair Dehydration Process in Production of Nitrocellulose

针对传统PID控制器在大时滞、无精确模型匹配系统中不能获得理想的控制效果,为保证纤维素硝酸酯真空热脱水后的残余水分含量和铺料厚度,提出在高位槽出料流量控制策略中引入多值逻辑控制算法。介绍该算法的描述以及系统结构,并在系统试车中试应用。实践表明,该控制器能满足生产需要,且多值逻辑控制算法具有鲁棒性、超调量、响应时间优于PID控制算法的优点,可在工业控制领域推广应用。

According to the bad performance of traditional PID controller in big time-delay and model-free system,for keeping the residual moisture content and the thickness on the material conveyor of vacuum-pyroair dehydrated nitrocellulose in a reasonable range,then suggest to introduce multiple-value logic control algorithm in head tank discharge flux control.Introduce the description of multiple-value logic control arithmetic and the system structure,and put it in the trial run.Practice shows that this controller meets the performance requirement in manufacture,and the multiple-value control arithmetic is superior to PID in robust stability,overshoot and response time,and it is applied to promote in the field of industrial control.