毕业论文英文摘要，急！帮帮忙啊！

来源：百度知道 编辑：UC知道 时间：2024/06/04 17:46:18
电加热锅炉是过程工业中常用的设备，其温度控制也是过程控制的一个重要参数。然而，电加热锅炉因其具有大时滞、非线性、难以建立精确数学模型等特点，采用常规的PID控制难以达到很好的控制效果，为此，人们研究了许多有关PID算法的改进的控制方法。
本文针对THFCS实验设备中的锅炉内胆温度控制对象，采用了改进的PID控制算法来实现温度控制。温度控制环节主要使用西门子STEP 7 FB58标准温度控制功能块，在FB58的基础上加入了温度的变化率，根据温度变化率来动态设定PID控制的温度死区，加快PID的调节速度。
本文采用西门子公司的S7-300 PLC作为控制单元，在STEP7环境下编写控制程序并应用WinCC组态软件实现对锅炉温度的监控。测试结果表明该方法具有较好的控制效果。
关键词：锅炉；温度控制；PLC；WinCC；PID
不要机器翻译的，谢谢，请高手帮下忙

Electric-heated boiler is a familiar equipment in process industry,its temperature an important parameter in process control.However,it is very difficult to get a good control effect if the conventional PTD control is used because the electric-heated boiler has large dead time,is nonlinear,and is difficult to establish precise mathematical model. Thus,many methods are being studied to improve the PTD control.

This paper focuses on the control object in the THFCS experiment,which is the temperature inside the boiler.Modified PID control algorithm is used to control temperature.Siemens STEP 7 FB58 standard temperature control function block is used mainly in the process of temperature control.In addition to the FB58,The change rate of temperature is added.The temperature dead zone(不是特别明白温度死区的含义，所以直译，如果觉得不对，告诉我) of PTD control is dynamically set according to the temperature change rate so that the regulating speed of the PTD can be increased.

This paper uses the