文档介绍：华中科技大学
硕士学位论文
电磁搅拌器自适应模型预测控制系统的设计与实现
姓名:程序
申请学位级别:硕士
专业:软件工程
指导教师:沈刚
2010-03-04
华中科技大学硕士学位论文
摘要
目前电磁搅拌是获得高品质的材料的重要环节之一,而电磁搅拌设备的控制精
度则直接影响搅拌效果。但是手工生产的电磁搅拌设备难具有一致的电气特性,而
且不同批次产品间的系统参数也变化较大,实际运行时有延迟且受惯性影响大。这
都为系统稳定快速的达到设定电流与频率制造了障碍。
Proportion Integral Derivative(比例-积分-微分控制器)开环调节算法通用性差,而
且用试凑法找到参数的过程也耗时耗力。可以说无论是系统部署还是实际运行都十
分不便。因此需要一种新的算法,不仅能够准确的对系统进行辨识而且能在有干扰
的情况下的使系统快速达到稳定,而自适应模型预测算法就能满足这种需求。
在统计大量数据的基础上总结了一些系统特性,并先后对自适应模型进行了
仿真与测试。在在本体线圈特性与内部模型接近时,以不同参数进行了测试,控
制结果比较理想。能够使得系统快速达到稳定,不超调。其它成果包括,在系统
扩展中,设计了系统集成组件,使得原 Linux 下位机与(西门子工控组态软
件)能够双向通信,大大提高了系统的实用价值。在复用和扩展 Microwire 协议的基
础上,设计并实现了三相搅拌系统的控制框架,同时进行了实际测试,对测试结
果进行了初步分析;研究了 TMS320F2812 的特性,实现并优化了脉宽调制程序,
使得脉宽调制程序能完全替代 SA866 进行脉宽调制工作。

关键词:模型预测控制迭代最小二乘法数字型号处理电磁搅拌

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华中科技大学硕士学位论文
Abstract
In modern metallurgical enterprise, ic stirring is is one important
aspect to obtain high-quality materials. The control precision of EMS has a direct impact
on mixing , ic stirring devices, which are made by hand, are
difficult to have the same electrical characteristics, and the system parameters between
products are also changed greatly, let alone inherent delay and inertia. All this create a
barrier for the system to rapidly achieve setting current and frequency.
The open-loop PID algorithm is hard to attained general use, without mentioning
time-consuming and labor-intensive cased by finding parameters of the algorithm. It can
be said that this algorithm is one source of the inefficient, during actual operation.
Therefore, there is need for a new algorithm which can not only accurately identify the
system, but also precise control system, while the adaptive model predictive algorithm be
able to meet this demand.
Base on large amounts of data statistics, it shows some characteristics of system
which can be used in control. Using the characteristics, Self-adapting MPC has been
implemented and tested under different parameters. When internal