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针对实际纱线张力测试过程的难度及复杂性,以织机系统纱线张力成因为导引,分析了送经-卷取机构的组成和运动机理.借助数字化样机和3D打印技术,设计了一种送经-开口-卷取机构简化模型.通过压力传感器、单片机及C语言编程设计开发了纱线张力闭环反馈控制模块,利用PWM波脉宽调制方式对送经-卷取电机进行驱动和调速,使纱线张力在允许范围内保持动态稳定.搭建形成了一套可实现动态纱线张力模拟、检测与控制的试验平台,通过纱线张力数据采集与实时调节,验证了传动机构和控制系统的可行性.为纱线张力测试技术的改进与创新提供了支持.“,”In view of the difficulty and complexity in actual process of yarn tension testing, the composition and movement principle of let-off and take-up mechanism were analyzed, which was based on the origin of yarn tension.With the aid of digital prototype and 3D printing technology, a simplified model of the mechanism composited by let-off, shedding and take-up was designed.A closed-loop feedback control module of yarn tension was designed and developed with pressure sensor, single chip microcomputer and C language programming, and the PWM wave was used to drive and regulate the speed of let-off and take-up motor, to keep the yarn tension dynamically stable within the allowed scope.A testing platform for simulation, detection and control of yarn tension was established, and the feasibility of the transmission mechanism and control system was verified through data acquisition and real-time adjustment of yarn tension.This provides a support for technique improvement and innovation of yarn tension testing.