油气悬挂动力学模型研究综述

Survey on dynamics model of hydro-pneumatic suspension

针对油气悬挂系统内部结构复杂性给分析和设计带来困难的问题,分析总结了国内外油气悬挂系统动力学建模研究成果,阐述了油气悬挂模型的研究现状,提出了具有理论指导意义的综述,指出了油气悬挂建模的难点在于其各种非线性因素的存在。基于流体力学理论和热力学理论,推导了油气悬挂缸数学模型,得到了输出力与位移和速度的关系。总结出了建模在油液压缩性、压力与容积关系、摩擦力与气体溶解性方面尚需解决的关键问题,并依此探讨了一些改进措施及方法。研究结果表明,考虑温度影响、气体状态方程修正、理论与实验联合方面的建模是未来潜在的研究热点。

Aiming at the problem that its interior complex structure brought difficulty to its kinetic analysis and design,the analysis and summary on dynamics modeling research achievements of hydro-pneumatic Suspension were listed,the research status of hydro-pneumatic suspension was summarized,then the review of theoretical guidance significance was put forward,and the difficulty of modeling lying in its various nonlinear factors was indicated. Based on the theory of thermodynamics and hydro-mechanics,the numerical model of hydro-pneumatic cylinder was established,then the relationship of force,displacement and velocity were got. In addition,some unresolved problems about compressibility of hydraulic oil,pressure-volume relationship,friction and solubility of gas were outlined. What＇ s more,some improvement measures and methods were discussed. The results above indicate that temperature factor,improving gaseity equation,and combining the theory with practice are the possible focus of future research.