纤维素硝酸醋真空热脱水工艺含水量多值逻辑控制系统

摘要

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.%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,为保证纤维素稍酸酯真空热脱水后的残余水分含童和铺料厚度,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,可在工业控制领城推广应用.