摘要
为了更好地表达液压系统各变量的输入、输出关系,以及更全面地考虑液压系统中的非线性,采用功率键合图建立了直驱泵控式液压机液压系统的数学模型,探讨了直驱泵控式液压机液压系统的负载、管路直径及泵的阻尼对液压系统动态特性的影响规律.同时,以液压缸的出口压力动态响应作为优化目标,用ODE变换法对仿真模型进行了参数优化.研究结果表明:液压系统的管路直径对系统的动态响应有较大的影响,泵的阻尼对液压系统的输出压力及输出速度影响很大.通过参数优化,得出当泵的阻尼为0.031 1时,该液压系统具有较为理想的动态响应.
A dynamic mathematic model of the directly-driven hydraulic press hydraulic system is constructed by means of power bond graphs to describe the relationship between input and output and completely consider nonlinearity in hydraulic system. The influences of load, pipe line diameter and pump damping of the hydraulic system on the dynamic characteristics are revealed. Some primary parameters are optimized by means of ODE converter technique based on optimization of dynamic pressure response to outlet of hydraulic cylinder. The results show that hydraulic pipe diameter has great influence on dynamic response of the directly-driven hydraulic system, and pump damping obviously affects output pressure and velocity of the hydraulic system. When the optimized pump damping gets 0. 031 1, the hydraulic system performs with better dynamic response.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2009年第7期79-82,共4页
Journal of Xi'an Jiaotong University
基金
广东省产学研合作项目
陕西省重大攻关项目(2007ZKC(2)03-04)
关键词
液压机
直驱泵控式液压系统
动态特性
仿真及优化
hydraulic press
directly-driven pump controlling hydraulic system
dynamic characteristic
simulation and optimization
