收卷机中张力控制系统的设计-毕业论文（设计）.docVIP

Abstract 摘要 PAGE IV PAGE I 摘要 张力控制是生产过程中极其重要的一环，良好的张力控制能够确保产品质量，提高生产效率。本文主要介绍了张力控制变频收卷的控制原理。此技术能够保证收卷的整个过程很稳定,避免小卷时张力过大；大卷启动时张力过小的现象。收卷中张力的控制就现在来说还是个难题，文章中基于建立的数学模型，介绍了变频收卷的原理,按照一定的控制策略进行数据处理，实时调整控制信号。通过PLC进行卷径的计算，改变变频器的输出频率，对电机进行控制。对收卷而言，随着卷径的逐渐增大，转矩的值也随之增大，变频器输出的速度将随之减少，符合收卷的基本原理，同时张力也在控制之中。系统实现了收卷张力的工艺定量化，完成了转矩和速度的自动跟踪转变。为了改进系统的控制性能，我们必须改进控制的策略。在收卷系统中，传统的PI控制不能够很好地满足张力控制的精度，稳定程度。所以文章在最后提出了模糊自适应PID控制方法，应该是以后张力控制算法的主流研究方向。 关键词：变频器，收卷，张力控制 ABSTRACT Good tension control improves product quality and productivity。The article introduces the control principle of tension controlled variable frequency。This technology makes the whole winding process stable and avoids the over tension of small winding and keep tension not getting too small in big rolling。The control of tension upon rolling-up is the conundrum at present。This article not only based the math model，but also introduced the project of invariable tension control according PLC which calculated the rolling diameter and adjusted the output frequency of transducer。And then, control the induction machine，for the winding machine，we use the vector control’s torque function to solve the problem of the constant speed system。The project achieved ideal that tension upon rolling-up is quantitative and torque with speed automatic follow conversion。In order to improve the performance of project, we must modify the control strategy to meet the needs。In this system, traditional PI control can not satisfy the requirements the precision of tension control and the stability of control system. Lastly, introduce the fuzzy learning PID which should be main control strategy in tension control。 Key Words：Transducer，rolling-up，tension control 目录 目录 PAGE 5 目录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc169662556 第1章 绪论 PAGEREF _Toc169662556 \h 1 HYPERLINK \l _Toc169662557 1.1 引言 PAGEREF _Toc169662557 \h 1 HYPERLINK \l _Toc169662558 1.2 收卷特性与力矩电机 PAGEREF _Toc169662558 \h 1 HYPERLINK \l _Toc169662559 1.3 变频器发展简介 PAGEREF _Toc1696625