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论文中文题名:

 凹版印刷设备控制系统的研究    

姓名:

 于文凤    

学号:

 04184    

保密级别:

 公开    

学科代码:

 081101    

学科名称:

 控制理论与控制工程    

学生类型:

 硕士    

院系:

 电气与控制工程学院    

专业:

 电气工程及其自动化    

第一导师姓名:

 杜京义    

论文外文题名:

 Study on Control System of the Gravure Printing Equipment    

论文中文关键词:

 张力控制 ; 模糊自适应 ; 变论域 ; 现场总线    

论文外文关键词:

 Tension Control Adaptive fuzzy Variable universe Fieldbus    

论文中文摘要:
在凹版印刷设备控制系统中,张力控制是生产过程中极其重要的一个环节,控制的好坏直接影响到产品的质量及生产效率的高低。系统在印刷过程中如何保持稳定的张力,已成为印刷行业中关注的主要问题之一。 针对凹版印刷设备控制系统的实现,论文的主要工作: 首先,阐述了凹版印刷设备控制系统的基本原理,对常用的张力执行部件及张力检测方式进行了分类比较,介绍了各自的优缺点;同时,深入分析了收放卷部分的受力状况及外部干扰等。 其次,探讨了凹版印刷设备的张力控制策略。由于张力系统具有大时变、强耦合、多干扰的特点,常规的PID算法不具有自适应调节能力,难以满足上述要求。针对这个问题,将模糊自适应控制算法引入到凹版印刷设备的张力控制系统中,实现了对PID参数的在线整定;为了进一步提高凹版印刷设备张力控制精度,采用变论域思想,提出了一种基于变论域的模糊自适应控制算法用于张力控制。通过对上述算法的仿真比较,结果表明基于变论域的模糊自适应控制算法控制精度明显优于其它方法。 最后,完成了对凹版印刷设备控制系统的实现。系统以可编程控制器S7-300为控制器,实现了凹版印刷设备多张力的集中控制;采用现场总线方式,实现了控制器与上位机及各传动装置的数据交换;通过上位机OP270,为用户提供了友好的人机界面,完善的功能。
论文外文摘要:
ABSTRACT Tension control is a very important part of production process in control system of gravure printing equipment. The quality of control decides the product quality and productivity. At present, one of the main problem in gravure printing process is how to keep stable tension. This paper researches on control system of the gravure printing equipment. The main tasks are as the follows. Firstly, this paper describes basic principle of gravure printing control system. The executive parts and detection modes of tension are compared, then, advantages and disadvantages are introduced. Meanwhile, the tension and disturbing factors of the unwinding/winding process are thoroughly analyzed. Secondly, control strategy of the gravure printing equipment is discussed. Because the gravure printing equipment features great dynamics change, strong coupling and many sources of disturbance, traditional PID control can not satisfy the control requirements. To resolve this problem, adaptive fuzzy setting control algorithm is introduced into this system to achieve the online setting of PID parameters. In order to improve the precision of tension control, an adaptive fuzzy setting control algorithm based on variable universe is presented. The simulation results show that the control precision of adaptive fuzzy setting control algorithm based on variable universe is better than other control algorithms. Finally, implementation for control system of the gravure printing equipment is completed. Simens S7-300 is chosen as core of controller to realize the integrated control of tensions in the gravure printing equipment. This scheme realizes the digital communication between controller and the upper computer based on fieldbus. As the upper computer, Simens OP270 offers friendly human machine interface, perfect function. ABSTRACT Tension control is a very important part of production process in control system of gravure printing equipment. The quality of control decides the product quality and productivity. At present, one of the main problem in gravure printing process is how to keep stable tension. This paper researches on control system of the gravure printing equipment. The main tasks are as the follows. Firstly, this paper describes basic principle of gravure printing control system. The executive parts and detection modes of tension are compared, then, advantages and disadvantages are introduced. Meanwhile, the tension and disturbing factors of the unwinding/winding process are thoroughly analyzed. Secondly, control strategy of the gravure printing equipment is discussed. Because the gravure printing equipment features great dynamics change, strong coupling and many sources of disturbance, traditional PID control can not satisfy the control requirements. To resolve this problem, adaptive fuzzy setting control algorithm is introduced into this system to achieve the online setting of PID parameters. In order to improve the precision of tension control, an adaptive fuzzy setting control algorithm based on variable universe is presented. The simulation results show that the control precision of adaptive fuzzy setting control algorithm based on variable universe is better than other control algorithms. Finally, implementation for control system of the gravure printing equipment is completed. Simens S7-300 is chosen as core of controller to realize the integrated control of tensions in the gravure printing equipment. This scheme realizes the digital communication between controller and the upper computer based on fieldbus. As the upper computer, Simens OP270 offers friendly human machine interface, perfect function.
中图分类号:

 TP273    

开放日期:

 2008-04-12    

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