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比例方向阀控气动缸动力机构建模
引用本文:杨庆俊,包钢,聂伯勋,王祖温. 比例方向阀控气动缸动力机构建模[J]. 哈尔滨工业大学学报, 2001, 33(4): 495-498
作者姓名:杨庆俊  包钢  聂伯勋  王祖温
作者单位:哈尔滨工业大学机电学院气动技术中心
摘    要:讨论了比例方向阀气动缸动力机械建模问题,采用工作点线性方法建立了动力机构和四阶模型,对位置系统和力系统推导了它的状态空间和传递函数形式,气缸两腔的压力动态存在差异,并且这个差异导致无法使用负载压降这个中间变量,基气动系统的这个特点,本文没有导出伺服系统的特性,并研究了平衡点附近系统模型参数的获取问题,为定量分析打下基础。

关 键 词:动力机构模型 平衡点 模型参数 气压伺服系统 气动缸 比例方向阀
文章编号:0367-6234(2001)04-0495-04
修稿时间:2000-12-08

Modeling of pneumatic cylinder controlled by electronic
YANG Qing jun,BAO Gang,NIE Bo xun,WANG Zu wen. Modeling of pneumatic cylinder controlled by electronic[J]. Journal of Harbin Institute of Technology, 2001, 33(4): 495-498
Authors:YANG Qing jun  BAO Gang  NIE Bo xun  WANG Zu wen
Abstract:The model of a pneumatic actuator consists of an electronic proportional directional valve and a pneumatic cylinder. By linearization at operating point, some 4 th order models, which are different from often been used 3 rd order ones, include state space forms and transfer function forms, are derived for position control and force control respectively. The dynamic characteristics of pressures in the two chambers of a cylinder are different from each other, and the difference causes the variable of load pressure drop useless in the modeling of a pneumatic system. The variable of load pressure drop is therefore not adopted and models are derived directly from first order approximates of the pressure dynamic equations. The models correctly describe the characteristics of the pneumatic system. How to get the parameters of the models when the system is close to equilibrium is also discussed for the purpose of quantitative analysis.
Keywords:model of pneumatic actuator  equilibrium  parameters of model  
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