基于AMESim的数字液压缸建模与动态特性仿真

发布时间：2018-07-03 00:56

本文选题：数字液压缸 + AMESim　；参考：《天津大学》2013年硕士论文

【摘要】：数字液压是正在发展的液压新技术，，数字液压缸作为其中一种执行元件，已经显现出巨大的发展潜力。它可以运用到绝大多数电液伺服控制的场合，将传统液压复杂的速度控制和位置控制变成了单一的脉冲控制，大大简化了控制系统。本文主要通过AMESim软件对其中一种内置反馈的步进式数字液压缸进行了建模与仿真，分析了其在不同情况下的动态特性和跟踪特性。全文的主要研究内容和成果如下：（1）在研究数字化液压传动发展的基础上，重点对数字液压缸的概念以及国内外发展现状进行了介绍。利用AMESim软件进行物理建模和仿真，挖掘其优势和特点，并针对不足之处提出改进措施。（2）在研究数字液压缸结构组成和工作原理的基础上，针对特定工况，对其结构参数进行了计算。同时，对阀控不对称液压缸进行了数学建模和分析，为数字液压缸的AMESim建模与仿真分析提供参考和对照。（3）根据所建立的AMESim模型，进行仿真。验证了数字液压缸增量式的工作原理，并通过改变单一变量保持其它变量不变的方法，仿真分析了负载变化、供油压力变化、制造误差、阀开口情况、连接管路杨氏模量等因素对数字液压缸动态特性的影响，同时提出了减小相应影响的措施。以正弦跟踪为例，仿真分析了数字液压缸的跟踪特性和改变运动方向时引起换向冲击的原因，针对造成冲击的原因，给出了相应改善措施。（4）搭建了数字实验台，对数字液压缸的单缸重复精度和多缸同步运行情况进行了实验，与仿真结果进行了比较分析。
[Abstract]:Digital hydraulic system is a new hydraulic technology. As one of the actuators, digital hydraulic cylinder has shown great development potential. It can be used in most cases of electro-hydraulic servo control, which makes the traditional hydraulic complex speed control and position control become a single pulse control, which greatly simplifies the control system. In this paper, a kind of step digital hydraulic cylinder with built-in feedback is modeled and simulated by AMESim software, and its dynamic and tracking characteristics are analyzed. The main research contents and achievements are as follows: (1) on the basis of the development of digital hydraulic transmission, the concept of digital hydraulic cylinder and the present situation of development at home and abroad are introduced. The physical modeling and simulation of AMESim software are used to excavate its advantages and characteristics, and the improvement measures are put forward in view of its shortcomings. (2) on the basis of studying the structure and working principle of the digital hydraulic cylinder, it aims at specific working conditions. The structural parameters are calculated. At the same time, mathematical modeling and analysis of valve-controlled asymmetric hydraulic cylinder are carried out, which provides reference and comparison for AMESim modeling and simulation analysis of digital hydraulic cylinder. (3) according to the established AMESim model, simulation is carried out. The working principle of incremental digital hydraulic cylinder is verified, and by changing the single variable to keep other variables unchanged, the variation of load, oil supply pressure, manufacturing error and valve opening are simulated and analyzed. The influence of Young's modulus on the dynamic characteristics of the digital hydraulic cylinder is discussed, and the corresponding measures to reduce the influence are put forward. Taking sinusoidal tracking as an example, the tracking characteristics of digital hydraulic cylinder and the causes of reversing impact caused by changing the direction of motion are simulated and analyzed. According to the causes of the impact, the corresponding improvement measures are given. (4) A digital experimental platform is built. The experiment of single cylinder repetition accuracy and multi-cylinder synchronous operation of digital hydraulic cylinder is carried out, and the simulation results are compared and analyzed.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TH137.51

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