电液比例伺服综合实验台阀控非对称液压缸动、静态特性研究

发布时间：2017-12-31 22:20

本文关键词：电液比例伺服综合实验台阀控非对称液压缸动、静态特性研究　出处：《沈阳工业大学》2011年硕士论文　论文类型：学位论文

【摘要】：在国民经济和军事工业的各个技术领域中,阀控非对称液压缸的电液比例控制系统应用广泛,其中又以位置控制系统最为典型,因此对其进行研究很有实际意义。电液伺服比例综合实验台是我校自主研发并调试安装的一台大型实验设备,其主要可以实现伺服系统的闭环时间响应特性实验；伺服系统频率特性实验；伺服系统误差测量实验；伺服系统控制策略研究实验；本文着重研究基于该试验台的阀控非对称液压缸系统。该闭环控制系统以比例换向阀作为控制元件,以液压缸为输出元件,以位移传感器作为反馈元件,实现对液压缸的位置闭环控制。本文首先介绍阀控非对称液压缸的工作环境,系统的主要用途及功能,即：电液比例伺服综合试验台基本情况。然后建立阀控液压缸位置闭环控制系统的线性数学模型；在线性数学模型建立之后查阅样本、手册,通过数学公式计算系统参数；建立阀控液压缸位置闭环控制系统的线性仿真模型。重点讨论系统的稳定性,阶跃响应特性,频率特性,非对称性等动态特性,并且研究分析该系统的稳态偏差。应用计算机仿真软件MATLAB中SIMULINK仿真工具包对系统进行仿真研究,并对仿真结果进行对比分析,以得到合理的控制参数,使该系统的性能进一步优化和改善。测试系统在典型的输入信号下的动、静态响应的各项性能指标。本文对阀控非对称液压缸位置控制系统进行详细而且系统的研究,对系统的响应曲线逐一分析研究,综合考虑电液比例伺服技术、计算机控制技术、系统线性建模仿真技术,并对非对称控制系统进行了研究,给相关课题研究提供了完整的方法及思路。
[Abstract]:In various technical fields of national economy and military industry, the electro-hydraulic proportional control system of valve-controlled asymmetric hydraulic cylinder is widely used, among which the position control system is the most typical. Therefore, it is of practical significance to study it. The electro-hydraulic servo proportional comprehensive experimental platform is a large scale experimental equipment developed and debugged by our university. It can mainly realize the closed-loop time response characteristic experiment of servo system. Frequency characteristic experiment of servo system; Error measurement experiment of servo system; Servo system control strategy research experiment; This paper focuses on the valve-controlled asymmetric hydraulic cylinder system based on the test rig. The closed loop control system takes proportional directional valve as control element, hydraulic cylinder as output element and displacement sensor as feedback element to realize position closed loop control of hydraulic cylinder. This paper first introduces the working environment of valve controlled asymmetric hydraulic cylinder, the main uses and functions of the system, that is, the basic situation of the electro-hydraulic proportional servo comprehensive test rig. Then the linear mathematical model of the closed loop control system for the position of the valve controlled hydraulic cylinder is established. After the establishment of the linear mathematical model, we consult the sample, manual, and calculate the system parameters through the mathematical formula; The linear simulation model of the closed loop control system for the position of valve controlled hydraulic cylinder is established. The stability, step response, frequency and asymmetry of the system are discussed, and the steady-state deviation of the system is analyzed. The system is simulated by using the SIMULINK simulation tool kit in the computer simulation software MATLAB, and the simulation results are compared and analyzed to obtain reasonable control parameters. The performance of the system is further optimized and improved. The dynamic and static response of the system under the typical input signal is tested. In this paper, the position control system of valve controlled asymmetric hydraulic cylinder is studied in detail and systematically. The response curve of the system is analyzed one by one, and the electro-hydraulic proportional servo technology and computer control technology are considered synthetically. The linear modeling and simulation technology of the system and the asymmetric control system are studied, which provides a complete method and train of thought for the research of related subjects.
【学位授予单位】：沈阳工业大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH137

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