基于组态软件的液位控制系统设计
毕业论文关键词: 组态王；锅炉汽包；液位控制系统；PID 控制
Abstract Process control is widely used in industrial production, which the liquid level control this paper studied is one kind of it. At present, the traditional PID control method is used to solve the problems of nonlinear and time-varying features in the industrial production of liquid level control system. Although a series of advanced algorithms appear and more suitable for industrial production of complex systems with the development of control theory, PID is still the most widely used controller. This paper have carried out a deep analysis of this phenomenon. Firstly this paper describe the significance and status of the research on the level control, the choice of the control strategy and the meaning and the control law of the PID. And then it uses the Kingview software combined with the PCT process control experimental device to simulate distillation production process of boiler drum three tank liquid control system and to research PID control application advantage in industrial production. The boiler drum level control system is introduced in detail. In the process of the study of boiler drum three tank liquid control, it mainly introduces the composition and function of the PCT experimental device, the specific steps of development in Kingview, how to realize the boiler drum level PID control and how to realize the real-time communication between Kingview and external. Next it analyses the real-time curves and data obtained in this experiment to find that PID control in boiler liquid control can achieve a good balance between shortening adjusting time and reducing the steady-state error and overshoot. And based on this, the system debugging is carried out in order to obtain the best PID control effect. Finally, it prospects the application of PID control and fuzzy control and other advanced algorithms in industrial production.
Keywords: Kingview; boiler drum; liquid level control system; PID control
目 录
第一章 绪论 1
1.1 液位控制研究意义和现状 . 1
1.2 蒸馏生产锅炉汽包液控研究意义与现状 . 1
1.3 PID 控制的意义与现状 . 2
1.4 水箱控制策略选择 . 2
1.5 论文结构与内容简介 .. 3
第二章 PID 算法原理 5
2.1 PID控制原理 5