摘要
利用Modelica语言建立了数控机床进给系统的多领域模型,在正交实验设计的基础上进行仿真实验,对影响进给系统动态性能的机械参数进行了灵敏度分析。结果显示:机械参数对进给系统动态性能的影响和对单纯的机械系统的影响是不完全一样的,与系统转动惯量正相关的机械参数的增大,会降低系统的动态响应性能,丝杠轴的阻尼系数存在最优值使得系统动态性能最好,而轴承和导轨的摩擦影响较小。
In order to carry on sensitivity analysis of mechanical parameters of computer numercial control( CNC) machine tool feed system which have influences on dynamic performance of feed system,a multi-domain model of CNC machine tool feed system was established by Modelica language and simulation experiments were done by using orthogonal experiment design. The results show that the effect of mechanical parameters on the dynamic performance of feed system is not completely the same as the effect on single mechanical system. With the increasing of mechanical parameters which are positive related to the inertia of feed system,the dynamic performance of feed system will be decreased. There is an optimal value of the damping coefficient of screw which makes the dynamic performance of feed system best. The friction of bearings and rolling guide has little impact on the dynamic performance of feed system.
出处
《机床与液压》
北大核心
2016年第3期98-101,共4页
Machine Tool & Hydraulics
基金
国家科技重大专项课题(2014ZX04009021)
国家863项目(2013AA041301)
关键词
多领域建模
数控机床进给系统
动态性能
灵敏度分析
Multi-domain model
CNC machine tool feed system
Dynamic performance
Sensitivity analysis
