多液压缸同步控制技术的研究

发布时间：2017-12-31 03:36

本文关键词：多液压缸同步控制技术的研究　出处：《江苏科技大学》2013年硕士论文　论文类型：学位论文

更多相关文章： 液压系统 同步控制 模糊控制 PID

【摘要】：随着液压技术在工程领域的应用，人们对液压执行机构的控制精度提出了越来越高的要求，特别是多液压缸顶升系统的同步精度。本文采用模糊PID控制器进行控制，从而提高了多液压缸顶升系统的同步精度。本文采用模糊PID控制器进行控制，从而提高了多液压缸顶升系统的同步精度。论文的主要内容如下：（1）在查阅大量文献的基础上，对现有的多液压缸同步系统进行了深入地研究，分析了该课题的研究背景及其意义，阐述了相关技术的国内外现状及其发展趋势，介绍了液压同步技术的应用情况及其发展阶段。（2）在满足使用要求和经济性的基础上，进行了液压元件的参数计算及其选型，并利用电液比例技术实现了多液压缸的位置同步控制。根据液压元件的技术参数，在AMESim平台上进行了液压元件的建模，使模型与实际样品具有相同的性能指标，以获得较高的仿真精度。在此基础上，搭建了整个液压系统的AMESim模型，检验了电液比例技术应用于该系统的可行性，并分析了造成多液压缸顶升不同步的原因。（3）针对各液压缸承受偏载及其载荷具有时变性等特点，本文采用模糊PID控制器对顶升过程进行控制。每个PID控制器采用两个模糊控制器进行参数整定，分别提高系统的动态特性和静态特性，，从而减少了单个模糊控制器的语言变量的数量，降低了模糊规则的建立程度。并利用MATLAB模糊逻辑工具箱，建立了控制系统的Simulink模型。（4）利用AMESim/Simulink接口，实现了液压系统与控制系统的联合仿真。仿真结果表明，模糊PID控制器的应用提高了系统的同步精度。
[Abstract]:With the application of hydraulic technology in the field of engineering, put forward higher requirement of control accuracy of the hydraulic actuator of the people, especially the synchronization precision of multi cylinder jacking system. This paper is controlled by fuzzy PID controller, which improves the accuracy of multi cylinder synchronous lifting system. This paper adopts fuzzy PID control the controller, so as to improve the synchronization accuracy of multi cylinder jacking system. The main contents of this paper are as follows:
(1) based on the literatures, the existing multi cylinder synchronous system are studied deeply, analyzed the research background and significance, elaborated the domestic and foreign status quo and development trend of related technologies, introduces the application situation and development stage of the hydraulic synchronization technology.
(2) in the foundation to meet the use requirements and economical efficiency. The parameter calculation and selection of hydraulic components, and realize the multi cylinder synchronous position control using electro-hydraulic proportional technology. According to the technical parameters of hydraulic components, hydraulic components are modeled on the AMESim platform, the model and the actual samples have the same performance index, to obtain higher simulation accuracy. On this basis, we established the AMESim model of the whole hydraulic system, the feasibility test of the proportional technology used in the system, and analyzes the cause of multi cylinder synchronous lifting causes.
(3) for each hydraulic cylinder under partial load and load time-varying characteristics, the control of the lifting process of fuzzy PID controller. Each PID controller parameter tuning using two fuzzy controller to improve the system dynamic characteristics and static characteristics respectively, thus reduce the quantity of single variable fuzzy controller language the reduced degree of establishing fuzzy rules. By using MATLAB fuzzy logic toolbox, establishes a model of Simulink control system.
(4) the joint simulation of hydraulic system and control system is realized by using AMESim/Simulink interface. The simulation results show that the application of fuzzy PID controller improves the synchronization accuracy of the system.

【学位授予单位】：江苏科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TH137.51

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