模糊控制算法在水箱液位控制系统中的应用.doc

辽宁科技大学本科生毕业设计（论文） 第 PAGE 32页 模糊控制算法在水箱液位控制系统中的应用 摘 要 液位控制是工业控制中的一个重要问题，针对液位控制过程中存在时变、非线性等特点，为适应复杂系统的控制要求，人们研制了种类繁多的先进的智能控制器，模糊PID控制器便是其中之一。模糊PID控制结合了PID控制算法和模糊控制算法的优点，可以在线实现PID参数的调整，使控制系统的响应速度快，过渡过程时间大大缩短，超调量减少，振荡次数少，具有较强的鲁棒性和稳定性，在模糊控制中扮演着十分重要的角色。本文介绍了模糊PID控制在双容水箱的液位控制系统中的应用。首先建立了液位控制系统数学模型，介绍了PID控制、模糊控制以及模糊PID的基本原理，然后利用MATLAB软件给出了设计结果，仿真结果验证了设计方法的有效性。 关键词：液位控制；模糊PID控制；仿真 Application of fuzzy control algorithm in the tank liquid level control system Abstract Liquid level control is an important problem in industrial control, for level control in big delay, time-varying and nonlinear characteristic, in order to adapt to complex system control requirements, people developed a wide range of advanced intelligent controller, fuzzy PID controller is one of them. Fuzzy PID control combined with PID control algorithm and the advantage of fuzzy control method, can realize adjustment of PID parameters online, and make the control system response speed, greatly shorten the transition time, overshoot less, fewer oscillations, has strong robustness and stability, and plays an important role in fuzzy control. This paper introduces the fuzzy PID control in the application of the double let water tank liquid level control system. Liquid level control system mathematical model is established first, and introduces the PID control, fuzzy control and the basic principle of fuzzy PID, and design result given by using MATLAB software, the simulation results verify the validity of the proposed design method. Keywords：liquid level control；fuzzy PID control；simulation 目 录 TOC \h \z \t 标题 1,1,标题 2,2,标题 3,3 HYPERLINK \l _Toc359248718 摘 要 PAGEREF _Toc359248718 \h I HYPERLINK \l _Toc359248719 Abstract PAGEREF _Toc359248719 \h II HYPERLINK \l _Toc359248720 1 绪 论 PAGEREF _Toc359248720 \h 1 HYPERLINK \l _Toc359248721 1.1 课题研究的背景与意义 PAGEREF _Toc359248721 \h 1 HYPERLINK \l _Toc359248722 1.2 模糊控制产生的背景与意义 PAGEREF _Toc359248722 \h 1 HYPERLINK \l _Toc359248723 1.3 液位控制系统研究的意义 PAGEREF