液压自由活塞发动机工作过程仿真模型研究  

Research on Working Process Simulation Model of Hydraulic Free-piston Engine

作　　者：吴维[1] 苑士华[1] 荆崇波[1] 郭凯[1] 

机构地区：[1]北京理工大学车辆传动国家重点实验室,北京100081

出　　处：《兵工学报》2011年第9期1059-1064,共6页Acta Armamentarii

基　　金："十一五"国家部委基础科研项目(A2220060053)

摘　　要：为建立单活塞液压自由活塞发动机工作过程仿真模型,根据单活塞液压自由活塞发动机的系统特征,基于热力学、液压流体力学和动力学基本理论,给出了单活塞液压自由活塞发动机稳态工况工作过程的数学描述,并对结果进行了试验验证。结果表明:给出的考虑了液压系统构件动态特性影响的单活塞液压自由活塞发动机仿真模型,在活塞动力学特征、气缸气体压力特征和液压腔压力特征上具有较高的仿真精度。模型适合于单活塞液压自由活塞发动机系统参数确定、优化以及系统工作特征的模拟。To establish working process simulation model of a single piston hydraulic free-piston engine,its basic feature is presented.Based on the theories of thermodynamics,hydromechanics and dynamics,its mathematical representations for the steady state working process are investigated.The simulation results are verified experimentally.The results show that the mathematical model considered the mechanical components dynamics of the hydraulic system achieves high precision.The simulated piston dynamics,cylinder gas pressure and hydraulic pressures are reliable.The model is propitious for the parameter design and optimization of the engine.

关 键 词：流体传动与控制 自由活塞发动机 动态模型 试验研究 液压系统 

分 类 号：TH137[机械工程—机械制造及自动化]