基于自适应模糊PID的径向柱塞变量泵电液伺服控制

【作者】 张立强；

【导师】 卢堃； 杨国来；

【作者基本信息】 兰州理工大学 ， 机械电子工程， 2003， 硕士

【摘要】 滑靴式径向柱塞变量泵是一种新型结构的液压泵，是德国Bosch公司在20世纪80年代研制成功的产品。它具有寿命长、噪音低、工作压力高、调节操作力小、吸油性能好、转速高、可采用特殊油液及多泵组合等优点。可实现恒压、恒流、负载敏感控制的电液伺服控制径向柱塞变量泵，具有电子技术和液压技术在不同方面的共同优势，广泛适用于各种工程机械、矿山机械、轧机设备以及注塑机械等。 我国在20世纪90年代开始自行开发研制径向柱塞变量泵，性能已达到了国外先进水平。本文拟利用电液伺服阀对径向柱塞变量泵进行精确控制，并利用MATLAB做进一步的仿真和分析。 针对电液伺服控制径向柱塞变量泵研究的现状，本文主要做了如下两个方面的工作： (1)在电液伺服系统中，电液伺服阀既是电液转换元件，也是功率放大元件，在电液伺服控制径向柱塞变量泵系统中有着举足轻重的作用。本文研究了电液伺服阀各组成环节的结构和参数，建立了它的数学模型，并应用MATLAB／Simulink进行了动态分析。 (2)结合当前先进的控制策略，针对电液伺服控制径向柱塞变量泵，设计了自适应模糊PID控制器，并通过计算机仿真，再现了系统跟踪阶跃信号、方波信号、正弦波信号、三角波信号、锯齿波信号时的系统响应。 仿真结果表明，基于自适应模糊PID控制器的电液伺服控制径向柱塞变量泵具有良好的动态性能。更多还原

【Abstract】 The radial piston pump with boot slider is a kind of new type hydraulic pump, which is developed by Germany Bosch CO. in 1980s and have lots of advantages, such as long life, low noises, high pressure, facile manipulate, high performance of oil-suction, high rotate speed, using special oil easily, multi-pump combination and so on. Electro-hydraulic servo controlling radial piston pump, which can achieve constant pressure, constant flow and sensitive-load performance and has the advantages of both electronic technology and hydraulic technology, is utilized widely in engineering machinery, mine machinery, rolling mill, injection shape machinery, and so on.In 1990s, radial piston pump starts to be developed in China, which performance is reached international level. In this paper, electro-hydraulic servo controlling radial piston pump with electro-hydraulic servo valve tracking step signal and some other signals is designed, and simulated with MATLAB/Simulink.By the actuality of electro-hydraulic servo controlling radial piston pump, some research efforts as follows are practised:(1) In an electro-hydraulic servo system, the electro-hydraulic servo valve is both the electro-hydraulic transition element and the power magnifier, which plays an important part. In this paper, the structure and the parameters of each element of the electro-hydraulic servo valve are studied. The mathematical model is set up and simulated with MATLAB/Simulink.(2) Based advanced controlling strategy now, self-adapting fuzzy PID controller is designed. Simulated with MATLAB/Simulink, system responses tracking step signal, square wave signal, sine signal, triangle signal and saw tooth signal are reproduced.Simulation results show that the dynamic characteristic of electro-hydraulic servo controlling radial piston pump using this self-adapting fuzzy PID controller is very good.更多还原