过程控制课程设计---过程建模与系统控制设计

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1、过程控制课程设计设计题目：过程建模与系统控制设计班级：学号：姓名：指导教师：设计时间：2012.5.7-2012.5.25摘要通过此次课程设计，对单容水箱、双容水箱完成建模，调节PID参数，使系统具有良好的稳态性能和暂态性能，并设计串级控制系统、前馈控制系统。比例系数加大，使系统的动作灵敏，速度加快，稳态误差减小。Ｋp偏大，振荡次数加多，调节时间加长。Ｋp太大时，系统会趋于不稳定。Ｋp太小，又会使系统的动作缓慢。Ｋp可以选负数，这主要是由执行机构、传感器以控制对象的特性决定的。如果Ｋｃ的符号选择不当对象状态(pv值)就会离控制目标的状态

2、(sv值)越来越远，如果出现这样的情况Ｋp的符号就一定要取反。积分作用使系统的稳定性下降，Ｔｉ小（积分作用强）会使系统不稳定，但能消除稳态误差，提高系统的控制精度。微分作用可以改善动态特性，Ｔｄ偏大时，超调量较大，调节时间较短。Ｔｄ偏小时，超调量也较大，调节时间也较长。只有Ｔｄ合适，才能使超调量较小，减短调节时间。关键词：过程建模，单回路控制系统，串级控制系统，前馈控制系统目录摘要1.概述·······················································12.设计要求·············

3、······································22.1实验系统熟悉及过程建模·································22.2实现单容水箱液位的单回路控制系统设计····················22.3实现双容水箱液位的单回路控制系统设计····················32.4实现水箱液位与进水流量的串级控制系统设计················32.5实现副回路进水流量的前馈控制····························43.设计内容········

4、············································53.1过程建模················································53.1.1实验装置············································53.1.2建立模型············································53.2单容水箱···············································203.2.1控

5、制原理···········································203.2.2调节PID参数·······································213.2.3旁路干扰···········································263.2.4副回路干扰·········································263.3双容水箱···············································273.3.1控制

6、原理···········································273.3.2PID参数············································283.3.3旁路干扰···········································293.3.4副回路干扰·········································303.4串级控制系统···········································313.4.1控制

7、原理···········································313.4.2PID参数············································323.4.3旁路干扰···········································343.4.4副回路干扰·········································353.5前馈控制系统···········································353.5.1控制

8、原理···········································353.5.2求解模型···········································373.