基于PM流量控制器的开式液体静压导轨动态特性分析(英文)  

Dynamic Characteristic Analysis of Open-type Hydrostatic Guide Based on PM Flow Controller

作　　者：高殿荣[1] 张作超[1] 赵建华[1] 

机构地区：[1]燕山大学机械工程学院,河北秦皇岛066004

出　　处：《机床与液压》2012年第6期39-47,共9页Machine Tool & Hydraulics

摘　　要：液体静压导轨系统实质是非线性系统,在分析其动态特性时通常被简化为线性系统,然而目前还未见关于对线性化导致的误差进行研究的文献。以PM控制器调节下的开式静压导轨为对象,推导了导轨关于压力、流量的非线性微分方程组。一方面,对导轨支承系统进行线性化处理,利用Laplace变换的方法获得了系统的传递函数,并绘制了系统的阶跃响应和脉冲响应曲线。另一方面,利用Simulink工具箱搭建了非线性系统的框图,并绘制了系统的阶跃响应和脉冲响应曲线。对比2种方法得到的响应曲线,线性化的系统与原系统的响应曲线差别很小,精度能够满足正常的工程需要,表明线性化处理对于PM控制器调节下的开式静压导轨是可行的。因此对静压导轨进行了动态性能分析,绘制了幅频、相频、动刚度曲线图。所做研究为线性化处理使用PM控制器的开式静压支承系统提供了理论依据,为工程实际提供了参考。Hydrostatic guide system, which is actually nonlinear system, usually is considered as the linear system when the dynamic performance is concerned, however, the error via linearization transform has not been analyzed. Take the open-type hydrostatic guide adjusted by PM flow Controller as an example, the nonlinear differential equations of the pressure and flow are derived. One method to linearize the nonlinear differential equations by Laplace transform and the corresponding transfer functions are obtained, and the step response curves and the pulse response curves are presented in this paper. The other method for hydrostatic guide system is to use Simulink tool box to build the nonlinear system block diagram of the guide system. The corresponding step response curves and the pulse response curves are presented as well. Comparing the response curves from these two different methods, the difference between the results are very small, and the precision of these two methods can meet the demand of the practical engineering application, and the linear treatment is valid for the open-type hydrostatic slide adjusted by the PM controller. Based on these methods, the dynamic performance on the slide is analyzed, and the amplitude-frequency curves, the phase-frequency curves, and the dynamic stiffness-frequency curves are presented. The present study provides a theoretical basis for the open-type hydrostatic slide based on PM flow Controller, and shows feasibility for the practical engineering applications.

关 键 词：PM控制器 开式静压导轨 非线性微分方程组 LAPLACE变换 动刚度 

分 类 号：TH137[机械工程—机械制造及自动化]