大时滞系统的无模型控制方法及应用  

Model-free control method and its application for large time-delay systems

作　　者：董娜 常建芳 韩学烁 吴爱国 DONG Na;CHANG Jianfang;HAN Xueshuo;WU Aiguo(School of Electrical and Information Engineering,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学电气自动化与信息工程学院,天津300072

出　　处：《哈尔滨工程大学学报》2018年第12期1987-1993,共7页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(61773282)

摘　　要：针对实际被控系统普遍存在的大滞后特点,设计了带有滞后时间输入变化率约束项的无模型自适应控制系统,以此来减小大时间滞后对整个控制过程的影响,并且引入典型大时滞系统进行了仿真比较研究;针对压缩式制冷系统非线性、大时滞、强耦合及难以建立可以实现控制的精确数学模型等特性,设计了制冷系统无模型控制方案,并进行了仿真研究。仿真结果表明:本文的无模型自适应控制算法具有优越的控制性能和更快的响应速度,提高了制冷系统的工作性能,从而验证了本文的控制方法的有效性。To address the large time delay characteristics of a system in actual application,a model-free adaptive control method with input rate constraint of time delay was designed to alleviate the impact of large time delay on the entire control process.A typical system with large time delay was simulated and compared.Then,the model-free control scheme was designed for a compressed refrigeration system to control the characteristics of its nonlinearity,large time delay,strong coupling,and difficulty in establishing accurate mathematical control model.Then,the control scheme was simulated and compared.The simulation results show that the new model-free adaptive control algorithm has excellent control performance and faster response speed,which improves the performance of the refrigeration system;thus,the effectiveness of this novel control method is validated.

关 键 词：大时滞 非线性 无模型控制 滞后时间常数 压缩式制冷系统 动态响应 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]