基于LABVIEW的温测控仪表设计.docVIP

毕业设计(论 文) 基于LABVIEW的温度测控仪表设计 系 别 自动化工程系 专 业 检测技术与仪器 学 号 5060912 姓 名 封居强 指导教师 金伟 2010年 6 月 15日 基于LABVIEW的温度测控仪表设计 摘要 论文首先概述了温度控制的发展与现状，介绍了虚拟仪器的发展及其突出特点。 其次根据小型加热器模型温度控制的原理，考虑各方面因素，利用前人对温度研究的成果主要是温度实时的测量数据对小型加热器模型进行了数学建模，确定其为一阶纯滞后的系统。通过分析小型加热器模型的非线性、时变性、大时滞、等特点。根据传统PID控制和大林算法各自的特点，结合其优点设计了一种大林算法的PID控制器。 再次本文详细地论述了系统的设计与实现方法，把虚拟仪器与温度控制相结合，用LABVIEW开发了一套大林算法自整定的PID控制算法的温度测控仪表，通过LABVIEW的MATLAB script节点对温度进行PID控制，同时前面板实现检测实时数据、设置PID参数、数据保存、错误报警等功能。 论文的最后阐述了虚拟仪器对现在和将来的科学研究的重要性及LABVIEW在仪表设计人机界面的智能化。同时利用LABVIEW中MATLAB script节点的强大功能验证了对于一阶纯滞后环节大林算法优越于普通的增量式PID控制。 关键词：虚拟仪器，PID控制，小型加热器模型，大林算法 LABVIEW-based design of temperature control instrumentation Autho:Feng ju qiang Tutor:Jin wei Abstract Measurement and control instrumentation products for the replacement of the existing speed too fast, poor compatibility between each other are difficult to meet different and changing user requirements. This use of editing’s computer, with appropriate design of the instrument hardware and application software LABVIEW Grouching of the temperature measurement and control instruments based on LABVIEW, it both Chanting instruments of the basic features, You Negron user according to the changing needs of customize at any time, to achieve a wide variety of applications Firstly an overview of the development of temperature controls and status of virtual instrument development and salient features. Next, the small heater temperature control Yuan Li model, considering all factors, using previous research results on the temperature of the main yes Temperature Real measured data for small heater model a mathematical model, it an order to determine the pure delay system. By analyzing a small heater model nonlinear, time-varying, large time delay, and so on. According to the traditional PID control and their own ch