毕业论文---砂布生产线温度控制系统的设计.docVIP

毕业论文（设计）题 目： 2012年月From the last century to 90 in the mid 80s, PLC has been rapid development in this period, PLC gradually entering the field of process control, ease of use, wide adaptation, high reliability and strong anti-interference,simple to program and so on.PLC control, especially in the industrial automation sequence control the position, in the foreseeable future, is no substitute. this paper introduces the drying room as the charged object to the production line temperature of the main accused of the export parameters to station temperature as deputy accused of parameters to control the heating resistance wire voltage parameters to PLC,the use of PLC ladder programming language, programming, production line temperature control. Automated production line a wide range of applications, in a considerable number of field .The quality of the product.automated production line control systems currently used mostly for computer control microprocessor core technology, both to improve the automation equipment have improved the control precision equipment. this paper on the abrasive cloth production line control system works, selection of temperature transmitter, PLC configurations, the configuration software design aspects were described.Through the transformation of automated production line control system has fast response,good stability, high reliability, control accuracy and good features, practical significance for industrial control.Key words: Abrasive Cloth Production Line Control System Control System Temperature Control PLC 1 绪论 1.1课题背景及研究目的和意义 基于PLC温度控制系统的应用领域相当广泛，温度控制系统的性能优劣决定了产品的质量好坏。目前砂布生产线温度控制系统大都采用以微处理器为核心的计算机控制技术，既提高设备的自动化程度又提高设备的控制精度。 PLC的快速发展发生在上世纪80年代至90年代中期。在这时期，PLC在处理模拟量能力、数字运算能力、人机接口能力和网络能力得到了很大的提高和发展。PLC具有通用性强、使用方便、适应面广、可靠性高、抗干扰能力强、编程简单等特点。[4] PID控制是迄今为止最通用的控制方法之一。因为其可靠性高、算法简单、鲁棒性好，所以被广泛应用于过程控制中,尤其适用于可建立精确数学模型的确定性系统。PID控制的效果完全取决于其四个参数,即采样周期ts、比例系数 K、积分系数Ki、微分系数D。因而,PID参数的整定与优化一直是自动控制领域研究的重要课题。PID在工业过程控制中的应用已有近百年的历史，在此期间虽然有许多控