数字液压缸非线性动态特性分析及试验

陈佳; 邢继峰; 彭利坤

doi:10.13433/j.cnki.1003-8728.2016.0709

数字液压缸非线性动态特性分析及试验

doi: 10.13433/j.cnki.1003-8728.2016.0709

1.
海军工程大学动力工程学院, 武汉 430033

基金项目:

国家部委基金项目（40103050210102）资助

详细信息

作者简介:
陈佳(1986-),博士研究生,研究方向为电液伺服控制、数字液压技术,jiachen815@gmail.com

通讯作者:
邢继峰(联系人),教授,硕士,x13871162349@163.com

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- 文章访问数: 190
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- PDF下载量: 8
- 被引次数: 0
出版历程
- 收稿日期: 2014-08-06
- 刊出日期: 2016-07-05

Analysis and Experiment on Nonlinear Dynamic Characteristics of Digital Hydraulic Cylinder

1.
College of Power Engineering, Naval University of Engineering, Wuhan 430033, China

摘要

摘要: 综合考虑阀芯螺旋运动和反馈机构动态，修正阀口流量方程，并基于LuGre摩擦模型推导得到了完整的数字液压缸非线性状态空间模型。对三种不同模型进行仿真并以试验为参考，验证了非线性模型的准确性，并利用所建模型重点分析了系统换向时的动态特性。结果表明：非线性模型能更真实地反映系统的响应特性；不平衡冲击与摩擦Stribeck效应耦合导致换向速度抖动，同时受工作压力、死区、阀芯径向泄漏、Stribeck速度和反馈机构刚度等非线性因素的共同影响，速度抖动状况呈现出多变性。
- 数字液压缸 /
- 非线性状态空间模型 /
- 动态特性 /
- 试验
Abstract: Through overall consideration of spool helical motion and feedback mechanism dynamics, by modifying the flow equations of valve ports, an integrated nonlinear state-space model was deduced based on LuGre friction model. Simulation results of the nonlinear dynamics were compared with those of other two existing models and experimental results, and the nonlinear state-space model was proved to be the most accurate one. Nonlinear analysis on dynamic responses of reverse motion was also carried out using the proposed nonlinear model. The results show that, nonlinear model can reflect the real system responses. The velocity flutter will be caused by coupling of imbalance impact and the friction Stribeck effect when reversing and it will also be affected by factors such as system pressure, dead zone, radial leakage, Stribeck velocity and feedback mechanism stiffness jointly, which means that the status of velocity flutter is mutable.
- digital hydraulic cylinder /
- dynamics /
- experiments /
- mathematical models

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参考文献(14)

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