前馈式多轴CNC系统跟随误差补偿控制模块的设计  

Design on feed-forward tracking deviation compensation control module for multi-axis CNC system

作　　者：李玮华[1] 

机构地区：[1]河北师范大学职业技术学院,石家庄050031

出　　处：《现代制造工程》2010年第9期8-12,共5页Modern Manufacturing Engineering

基　　金：国家自然科学基金项目(50275148)

摘　　要：采用不变性原理构建前馈补偿控制系统的理论结构模型,并进行系统幅值误差的分析。建立零件空间线性轮廓误差的数学模型,并由此确定前馈补偿量的算法。设计了以单片机为核心的前馈补偿控制模块的硬件原理电路和补偿数据处理程序的软件结构。通过仿真实验,验证了控制模块的补偿功能。结果表明,该设计能够有效地消除计算机数控(CNC)系统的相位滞后和幅值误差,提高普通数控系统对零件轮廓的加工精度。The structural model of the tracking deviation feed-forward compensation control system was developed by use of the invariance principle,to analyze amplitude deviation of the system.The mathematical model of the space linear contour deviation of part was developed to define computational method of the feed-forward compensation value.Designed on hardware circuit schematic and software program structure of data processing of the feed-forward compensation control module by the microcomputer-led at the core.The compensation function of control module was validated by simulation experiment.The result is that phase lag and amplitude deviation of CNC system can be effectively eliminated and machining accuracy of ordinary CNC system can be advanced by use of this module.

关 键 词：前馈补偿 跟随误差 误差模型 硬件电路 软件结构 

分 类 号：TH165.4[机械工程—机械制造及自动化]