双容水箱液位串级控制算法的仿真研究.docVIP

本 科 毕 业 设 计 论 文 题 目 双容水箱液位串级控制算法的仿真研究 系 别 电气与信息工程系 专 业 自动化 班 级 自动化701 学号 学生姓名 王文华 指导教师 郭 霞 2011年 6月 摘 要 本文的研究任务是对双容水箱液位控制系统以及。 首先，本文阐述了控制的基本概念然后对双容水箱进行机理，并采用双容水箱系统的模型。 ，采用以及对系统进行控制。参数整定这两种方案都可以很好地提升系统的动态及稳态性能从MATLAB/SIMULINK的仿真曲线上观察到控制器的输出曲线呈高频状态并且存在明显的抖振。 最后，将控制与PID控制的控制效果进行。仿真结果表明，控制在控制质量上优于PID控制。 关键词：液位控制 ABSTRACT This research task is two-tank water level control system, control algorithm, the basic PID control and cascade control of the simulation. First, this article describes the basic concepts related to level control; and then double-tank system for mechanism analysis and experimental method used to build models of two-tank system. Second, using the basic PID control and cascade control of water level control system to control it. Parameters of the two control schemes, after tuning into system operation. Both programs can be a good dynamic and steady increase system performance, from the MATLAB / SIMULINK simulation curves compare observed no interference PID control system step response shows that, cascade control reduces the maximum deviation, reduced Oscillation frequency, greatly reducing the conditioning time. In the case of interference: the output curve of the two controllers were tested and there are obvious high-frequency oscillation state of the buffeting.Finally, the cascade controller and PID controller to control the basic analysis of the effects. Simulation results show that the cascade control quality better than in the control of basic PID control. KEY WORDS: liquid level control,cascade control, basic PID,Simulation 目录 摘 要 I ABSTRACT III 1 绪 论 1 1.1选题背景及意义 1 1.2 国内外研究现状 2 1.2.1 过程控制的特点 2 1.2.2 液位控制系统的发展现状 2 1.2.3 液位控制的前景 3 1.3 本文研究内容 4 2建立数学模型 5 2.1 数学建模的基本概念 5 2.2 数学建模的过程 5 2.3 数学建模的建立方法 6 2.3.1机理法 6 2.3.2 实验法 6 2.4 双容水箱数学模型建立 8 2.4.1系统介绍 8 2.4.2 数学模型建立步骤 10 2.4.3 实验数据