摘要
以数控机床为研究对象,建立滚珠丝杠进给系统动力学模型,并根据滚珠丝杠的安装方式,建立进给系统轴向刚度和扭转刚度模型。根据刚度对进给系统动态特性的影响,利用动态仿真工具MATLAB/Simulink建立包含刚度环节的进给系统仿真模型,获得了反映系统性能的仿真曲线。为减小刚度因素对系统性能的影响,提出控制补偿策略,仿真结果表明该策略提高了进给系统的稳定性和快速响应特性,减少了系统稳态误差。
The Numerical Control（NC） machine tool was investigated and the dynamics model for the feed servo system was established.Based on the fixing constraint of the ball screw,the mathematical models of axial stiffness and torsion stiffness are constructed.According to the effects of stiffness on the dynamic performance,the simulation model for CNC machine tool feed system with stiffness considered was set up by the dynamic simulation tool MATLAB/Simulink,and a curve representing the performance of the system was obtained.To reduce the effect of stiffness on the system,the strategy is used for stiffness compensation.The simulation results show that the stability and response performances of the system are improved and the steady-state error of the system is reduced by the control strategy.
出处
《现代制造工程》
CSCD
北大核心
2010年第11期5-8,98,共5页
Modern Manufacturing Engineering
基金
国家科技重大专项资助项目(2009ZX04001-015)
关键词
进给系统
刚度
建模
仿真
前馈控制
feed system
stiffness
modeling
simulation
feedforward control
