树脂粘度的在线计算机控制系统研究

论文编号:ZD621 论文字数:18725,页数:40，有外文翻译，

摘　要
 粘度是指在流体中流体抗其不可逆位置变化的能力，是对流体内部流动阻力的一种度量。粘度测量在石油、化工、纺织、国防、机械和电力等行业应用非常广泛。它对纤维增强塑料制品的性能的影响很大，主要表现在制品的厚度、强度、气密性和剪切强度等。树脂的粘度越高，那么其流动性越差，原材料外表面上的树脂分布就越不均匀;反之，如果树脂的粘度很低，被浸渍物的浸胶量会过低，这两种情况都将导致制品性能下降。本文研究的是应用于微机控制纤维缠绕机或浸胶机的树脂粘度的测量与控制，根据实际情况选择性价比高且操作简单的单筒式旋转测量法测量树脂粘度。该系统的目的就是可以根据实际需要实时改变树脂的粘度，使制品的性能得到极大的提高。
    目前，国内外也有专门测量流体粘度的仪器，但它们一般仅仅具有测量粘度的功能，而且大多数不能和计算机相连接并受计算机的控制。本文提出树脂粘度计算机控制系统方案不但能在线测量和控制树脂粘度，实时显示粘度控制曲线、粘度值，方便地实现树脂粘度的设定、传感器的标定、模糊控制器参数的改变，而且能通过控制界面随时改变粘度的设定值。该系统操作简单，界面友好，能够得到较好的控制效果。
关键词: 树脂，粘度，纤维缠绕机，模糊控制
ABSTRACT

 Viscosity is the ability of anti-position change in liquid. It is one of measurement of inner flow resistance. Measurement of Viscosity plays an important role in petroleum, chemistry, weaving, national defense, machine and electric power. It has great influence of product's performance of fiber-reinforced plastic, such as thickness, intension, gas closeness and cutting intensity etc. The higher resin viscosity is, the poorer its ability of moving and the worse proportioned of resin on the surface of raw and processed materials. On the contrary if resin's viscosity is very low, the capacity of resin in soiled thing become lower. Both this two conditions can lead to decrease product's performance. This article focuses on measurement and control of resin viscosity in Microcomputer control fiber winding machine or dipping glue machine. The purpose of this system is to change resin viscosity real time in accordance to actual needs, and then to improve product's performance.
    Now there are some special apparatuses to measure viscosity of liquid, but generally they just have function of measurement and most of them can't communicate with and be controlled by computer. This article brings forward a way of computer control system. It can not only control resin viscosity online and display control curve, but also change target value through friendly control interface. It can be operated easily and it will greatly improve control effect.
Keywords: resin，viscosity，fiber winding machine，fuzzy control
目　录

第1章　绪论 1
1.1 课题来源与选题目的意义 1
1.2 缠绕成型工艺简介 1
1.3 本论文的主要研究内容 5
第2章　树脂粘度控制系统技术要求 7
2.1 技术要求 7
2.2 技术难点分析 7
第3章　技术可行性分析及控制系统方案的确定 8
3.1 基本实现方案 8
3.2 检测系统方案 10
3.3 控制算法的确定 16
3.4 执行机构方案 17
3.5 元器件的选定 19
第4章　模糊控制理论及模糊控制器设计 22
4.1 模糊控制的发展与特点 22
4.2 模糊控制器的基本原理和结构 24
4.3 模糊控制的实现方法 27
4.4 本系统所选择的控制器参数 28
第5章　机械硬件模块设计 31
5.1 机械结构设计 31
5.2 硬件电路模块设计 32
参考文献 35
致　谢 36

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