目的 提高立式包装机的薄膜包装材料运行速度控制精度，提升包装袋的袋长精度和袋形外观质量。方法 分析了影响立式包装机包装材料恒速控制精度的因素，在此基础上提出自适应模糊PID的控制策略，以实现系统参数的在线调整及优化，进而实现包装材料的速度在线调节。同时基于PLC搭建立式包装机控制系统，介绍控制系统的硬件结构和软件设计方法。结果 实验结果表明，文中提出的控制方法包装精度约为±0.1 mm，有效提高了包装材料供送速度精度，使其速度误差控制在允许范围以内。结论 该控制系统实现了包装材料供送速度的精确控制，提高了袋长精度和袋形质量。

The work aims to improve the running speed control accuracy of film packaging material of vertical packaging machine and enhance the bag length precision and bag shape appearance quality of the packaging bag. The factors affecting the accuracy of the constant speed control of packaging materials of vertical packaging machine were analyzed. Based on that, an adaptive fuzzy PID control strategy was proposed, so as to achieve the on-line adjustment and optimization of the system parameters, thus realizing the on-line regulation of the speed of the packaging materials. At the same time, the control system of the vertical packaging machine was established based on PLC. The hardware structure and software design method of the control system were introduced. The experimental results showed that the packaging accuracy of the proposed control method was about ±0.1 mm, which could effectively improve the feeding speed accuracy of the packaging material and control the speed error within the allowable range. The control system realizes the precise control of the feeding speed of the packaging material, and improves the bag length precision and the bag shape quality.