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化工学报  2012 

基于控制性能比较的非线性不对称系统预测控制

DOI: 10.3969/j.issn.0438-1157.2012.10.025, PP. 3183-3188

Keywords: 非线性不对称系统,预测控制,控制性能指标,pH值控制

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Abstract:

生产过程某些非线性系统常常表现出不对称动态特性,相对于其在工业工程中经常出现的理论研究特别是控制方法研究则十分有限。本文针对基于正反方向上的两个线性模型分别设计PID控制器的缺陷,提出根据正反方向上的线性模型分别设计相应的状态反馈预测控制器。在每一步的控制率计算中,正反方向的控制器分别计算控制作用,并通过比较正反控制器的控制性能指标来确定最终采用的控制作用。通过pH值控制的仿真实验证明其对非线性不对称系统的控制效果明显优于传统的在正反方向分别采用PID控制的控制效果。

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