单出杆对称液压缸电液伺服系统动静态特性研究

发布时间：2018-11-19 22:26

【摘要】：随着中国液压行业的快速发展，一些行业发展的瓶颈问题也凸显出来，例如国内液压元件的生产厂家的产品基本都是低水平的普通液压元件，产能过剩，导致厂家不得不采取降低价格的措施来适应竞争激烈的市场，同时国内无法生产出性能可靠的高端液压元件，用户不得不购买国外价格昂贵产品，受人制约。所以国内液压元件行业的发展方向之一应该是具有生产高档、高技术含量的液压元件的能力。液压缸作为最常用的液压元件之一，也存在着制造水平低、高档液压缸严重依赖进口的问题，而且目前广泛应用的普通工程液压缸已经不能满足国内的应用需求，很多领域需要使用特殊结构和功能的液压缸。同样随着液压行业的快速发展，电液伺服阀控式电液伺服系统在航天、航空、航海、兵器、矿山、冶金及民用等方面都得到了广泛应用。但随着近些年复杂运动控制系统对液压伺服系统性能要求的增加，液压控制系统的局限性开始凸显出来。例如电液伺服阀和液压缸的动力学特性和非线性问题，它们是影响阀控液压缸电液伺服系统性能的主要因素，，所以如何提高系统适应性和鲁棒性一直是电液伺服系统的研究热点。针对以上问题，本文设计了一种特殊结构的液压缸——单出杆对称液压缸，它既有单出杆非对称液压缸结构尺寸小的优点，也有双出杆对称液压缸动态特性对称的优点，特别适合应用于飞行模拟器、运动平台等场合。同时设计了对称阀控单出杆对称液压缸电液伺服系统和对称阀控单出杆非对称液压缸电液伺服系统，通过对两种系统的静态特性理论分析、动态特性仿真分析和实验研究，验证了单出杆对称液压缸具有承载能力大、动态特性对称的优点。
[Abstract]:With the rapid development of the hydraulic industry in China, the bottleneck problems in the development of some industries have also been highlighted. For example, the products of domestic manufacturers of hydraulic components are basically low-level ordinary hydraulic components, with overcapacity. As a result, manufacturers have to take measures to reduce the price to adapt to the fierce competition in the market, at the same time, the domestic can not produce high-end hydraulic components with reliable performance, customers have to buy expensive products from abroad, which is restricted by people. Therefore, one of the developing directions of domestic hydraulic components industry should be the ability to produce high-grade and high-tech hydraulic components. As one of the most commonly used hydraulic components, the hydraulic cylinder also has the problems of low manufacturing level and high grade hydraulic cylinder relying heavily on imports. Moreover, the widely used ordinary engineering hydraulic cylinder has been unable to meet the domestic application needs. Hydraulic cylinders with special structures and functions are required in many fields. With the rapid development of hydraulic industry, electro-hydraulic servo valve-controlled electro-hydraulic servo system has been widely used in aerospace, aviation, navigation, weapons, mines, metallurgy and civil. However, with the increase of the performance requirements of the complex motion control system in recent years, the limitation of the hydraulic control system has been highlighted. For example, the dynamic characteristics and nonlinear problems of the electro-hydraulic servo valve and the hydraulic cylinder are the main factors that affect the performance of the electro-hydraulic servo system of the valve-controlled hydraulic cylinder. Therefore, how to improve the adaptability and robustness of the system has been the research hotspot of electro-hydraulic servo system. In order to solve the above problems, a special structure hydraulic cylinder, single outlet rod symmetrical cylinder, is designed in this paper. It has the advantages of small structure size and symmetrical dynamic characteristics of double outlet rod symmetrical hydraulic cylinder. Especially suitable for flight simulator, sports platform and other occasions. At the same time, the electro-hydraulic servo system of symmetrical hydraulic cylinder with symmetrical valve control rod and asymmetric hydraulic cylinder with symmetrical valve control rod is designed. The static characteristics of the two systems are analyzed theoretically, the dynamic characteristics are simulated and studied experimentally. It is proved that the symmetrical hydraulic cylinder with single outlet rod has the advantages of large bearing capacity and symmetrical dynamic characteristics.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH137.5

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