An Improved Dynamic Model of Pneumatic Actuators
An Improved Dynamic Model of Pneumatic Actuators
复制标题
一种改进的气动执行器动态模型
DOI：
10.1080/14399776.2000.10781090
复制
发表时间：
2000
影响因子：
0.8
通讯作者：
S. Colin
中科院分区：
文献类型：
--
作者：
J. Maré;O. Geider;S. Colin
摘要为了开发面向构件的气动执行器数字样机模型库，提出了一种改进的气动千斤顶预测模型。首先，阀孔模型是根据ISO标准导出的，作为孔开口的函数。然后，气室的行为进行建模，使用严格的理论发展的守恒定律。因此，不需要关于气体的演化的假设，仅被认为是理想的。一个固定参数的对流模型被认为是可以接受的，以定义气体和千斤顶环境之间的热交换。最后，提出了一个描述千斤顶内摩擦力的模型，该模型考虑了压力和工作象限对粘性效应和库仑效应的影响。然后提出了仿真结构，并使用一步一步的过程中，该模型进行了验证。
Abstract An improved predictive model of pneumatic jacks is introduced in order to develop a component oriented model library for the numerical prototyping of pneumatic actuators. First, the valve orifices model is derived from the ISO standard as a function of the orifice opening. Then the gas chamber behaviour is modelled using a rigorous theoretical development of conservation laws. Consequently, no assumption is required concerning the evolution of the gas only being considered as ideal. A fix parameter convective model is found acceptable to define the heat exchange between the gas and the jack environment. Finally, a representation model of the internal jack friction is proposed including the influence of pressure and working quadrant on viscous and Coulomb effects. The simulation structure is then presented and the model is validated using a step by step procedure.