目的 为了提高制袋产品质量及同步控制精度，实现产品技术升级，设计一种基于虚拟总轴的多轴同步控制系统。方法 以三边封制袋机为研究对象，介绍其工艺流程及工作原理，搭建其运动控制系统拓扑结构，基于虚拟总轴同步控制策略，详细分析制袋机多轴同步控制基本原理，设计一种浮辊补偿算法，给出软件设计方法，并通过实际运行采集实验数据进行验证。结果 该控制系统可以满足制袋机的运动控制要求，补偿相邻两轴间的同步误差，使得制袋系统两牵引轴间同步误差控制在0.3%左右。结论 引入该策略的同步控制系统具有良好的同步性与稳定性，提高了制袋质量、精度和效率，降低次品率，较好地满足了制袋机裁切精度要求。

The work aims to design a multi-axis synchronous control system based on virtual shaft to improve the quality of bag making products and accuracy of synchronous control and achieve product technology upgrades. Taking the three-side sealing bag making machine as the research object, its technological process and working principle were introduced, its motion control system topology structure was built, the basic principle of multi-axis synchronous control of bag making machine was analyzed in detail based on the synchronous control strategy of virtual shaft, and a floating roller compensation algorithm was designed. The software design methods were given, and the experimental data were collected through actual operation for verification. The proposed control system could meet the motion control requirements of the bag making machine, and compensate the synchronization error between the adjacent two axes, so that the synchronization error between the two traction axes of the bag making system was controlled at about 0.3%. The synchronous control system with this strategy has good synchronization and stability, improves the quality, accuracy and efficiency of bag making, reduces the defective rate, and better meets the cutting precision requirements of bag making machine.