一种新型数字伺服油缸的非线性仿真分析

Nonlinear simulation analysis of a new type digital servo cylinder

建立一种用伺服螺旋机构原理设计的小行程数字步进伺服油缸的动态数学模型。基于非线性仿真模块,在MAT-LAB/Simulink环境中,根据活塞下腔长度、工作负荷、螺旋槽断面尺寸和活塞半径四个主要结构及工作参数的变化,获得动态响应曲线,并仿真分析该数字伺服油缸的频率特性。结果表明,该数字伺服油缸在满负载和小行程工况下具有较好的动态特性,可广泛应用于数控调整系统领域。

A detailed mathematical model of a new type short-stroke digital servo cylinder was designed by using helix mechanism principle.Based on the nonlinear simulation modeling,the simulation on the system was carried out in MATLAB/Simulink.Based on a dynamic response curve obtained by the change of four main parameters,the down cavity length of the piston,work load,the section size of helix slot and piston radius.The frequency response of the digital servo cylinder was analysed.Especially under the conditions of near to a full load and a small journey,its characteristic was much better.So the digital cylinder has a good application value in the adjusting system of digital control.