基于PLC伺服控制的甘油雾化喷涂系统设计

根据香烟滤棒的丝束甘油雾化喷涂原理，设计的甘油雾化喷涂系统采用PLC和触摸屏作为主控制器，由甘油桶、温度控制子系统、甘油雾化子系统、喷涂活门和伺服系统组成.研究了活门精确定位的伺服控制，该技术实时跟随丝束的运行速度，由PLC给出活门开度对应的、伺服电机转动所需的、高速脉冲数作为系统的位置给定量，通过位置环、速度环和电流环的三闭环PID控制精确定位活门开度，实现甘油的均匀喷涂，保证甘油喷涂量.给出PLC控制程序流程图，对系统进行了实际运行测试.结果表明：系统运行可靠，滤棒的硬度控制达到国家标准.

Design of Glycerol Spray System Based on PLC Servo Control

According to the theory of cigarette filter rod glycerol spray, the glycerol spray system uses PLC and touch screen as the main controller and consists of glycerol case, controlled temperature subsystem, glycerol spray subsystem, spray valve and servo systems. This paper studied the servo systems to make the valve position precise, and this technology can realize the tracking of the speed of the running tow in real-time. The PLC(Programmable Logic Controller) created the high-speed pulse trains, which correspond to the valve position and are used by the servo systems as the given displacements. Three closed loops of position, speed and current PID(Proportion Integral Differential) control were constructed to make the valve position precise, thus realizing the uniform spray of the running tow and ensuring glycerol spray in quantity eventually, as shown in the PLC control program flow charts. The system test results have shown that the system operates reliably and the hardness of the filter-rod has reached national standard.