直驱泵控式液压机液压系统的动态特性仿真及优化  

Dynamic Simulation and Optimization of Hydraulic System for New Directly-Driven Pump Controlling Hydraulic Press

作　　者：魏树国[1,2] 赵升吨[1] 张立军[1] 韩耀鹏[3] 

机构地区：[1]西安交通大学机械工程学院,西安710049 [2]安徽铜陵学院机械工程系,安徽铜陵244000 [3]西北机电工程研究所,陕西咸阳712009

出　　处：《西安交通大学学报》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)

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.

关 键 词：液压机 直驱泵控式液压系统 动态特性 仿真及优化 

分 类 号：TG385.1[金属学及工艺—金属压力加工]