基于模糊PID烟叶烤香温湿度控制系统设计

Design of tobacco leaf roasting savory temperature & humidity control system based on fuzzy-PID

针对烟叶烘烤过程中的5个烘烤时期对温度和湿度的不同要求,提出了基于模糊PID的烟叶烘烤控制系统,该系统利用模糊PID调节技术,通过调节轴流循环风机的转速,缩小烤房内上下部温差,实现烤房内温度基本均匀;通过调节供氧鼓风机的转速控制燃煤供氧量,从而实现现行升温、稳温控制;通过调节步进电机的正反转步距值,控制补风门的开启角度,控制进风量,从而实现烤房内湿度保持平稳,提高烟叶色、香、质等级,提高烟叶品质。运行表明:该系统能有效地控制被控对象的运行状态,具有控制精度高、稳定性好等特点,确保了烟叶烘烤质量。

Aimed at different require of temperature and humidity of five mast period during tobacco leaf roasting, control system of tobacco leaf mast control tactics based on fuzzy-PID is proposed. In order to increase the color grade, savory grade and quality grade of tobacco leaf, the control system uses fuzzy-PID technology, decreases difference in temperature between mast house top and bottom, achieves fundamental leveling of temperature through adjusting rotate speed of axle flow draught fan, the control system can achieve heating up and steadying temperature through controlling oxygen quantity of coal burning by adjusting rotate speed of oxygen fan, the control system can keep humidity smooth in roast house by controlling quantity of air entering roast house In fact, the control system can affectively control running states of object, it has good characteristics such as high control precision, good stability, this is the reason that ensure the quality of tobacco leaf roasting.