文档介绍：本科毕业设计(论文)
题目
基于PLC控制的交流
电机变频调速系统
学生姓名
学号
教学院系
电气信息学院
专业年级
指导教师
职称
单位
电气信息学院
辅导教师
职称
单位
Southwest Petroleum University
Graduation Thesis
AC motor speed control system based on PLC control
Grade:
Name:
Major: Automation
Instructor:
School of Electronics and Information Engineering
2012-6
摘要
交流电机作为运动控制的关键部分,在油田注水中起着十分重要的作用。本设计是基于罗克韦尔PLC的交流电机变频调速系统,完成数据实时采集、控制量实时输出和控制过程的实时监控,达到系统响应快速、控制精确的目的。
论文以罗克韦尔PLC作为控制器,变频器作为执行机构,异步电机作为控制对象,测速发电机作为检测机构,在罗克韦尔以太网和控制网平台上搭建控制回路。在控制器中加入PID控制,模糊PID控制,单神经元自适应PID控制,得到它们的动态响应曲线,并对动态性能和稳态性能进行对比。
结果表明,PID控制使系统具有很高的稳态精度,动态性能较差;模糊PID使系统具有良好的动态响应和很高的稳态精度;单神经元自适应PID控制有良好的动态响应和较强的鲁榜性。实验证明通过控制算法的改进,系统性能得到了大大提高。所以,PLC交流调速系统可以广泛应用于油田注水系统中。
关键词:异步电机;变频控制;PID;模糊PID;单神经元自适应PID;罗克韦尔网络
Abstract
AC motor as a key part of the motion control, plays an important role in the oilfield water experimental design an Ac speed adjustment system based on Rockwell automation PLC, completes data real-time gathering, the control quantity real-time output and the controlled process real-time monitoring, achieves the system response to be fast, control precise goal.
The system use Rockwell PLC as controller, frequency converter as actuator, asynchronous machine as controlled object, tachometer generator as feeler mechanism. Build the control loop in the Rockwell and the platform. Joins the PID control, fuzzy PID, Single neuron adaptive PID in the controller the control, obtains their dynamic response curve, and carries on the contrast to the dynamic property and the stable state performance.
The result indicated that the PID control enables the system to have the very high stable state precision, but the dynamic property is bad; Fuzzy PID enables the system to have the good dynamic response and the very high stable state precision. Single neuron adaptive PID control has a good dynamic response and strong adaptability. Experimental results show that the control algorithm, the system performance has been greatly improved