六轴混联数控机床的闭环控制及误差补偿  

Closed-Loop Control and Error Compensation for Six Axis Hybrid NC Machine Tools

作　　者：张立新[1] 黄玉美[2] 王卫兵[1] 

机构地区：[1]石河子大学机械电气工程学院,新疆石河子832003 [2]西安理工大学机械与精密仪器工程学院,陕西西安710048

出　　处：《石河子大学学报（自然科学版）》2008年第3期375-378,共4页Journal of Shihezi University(Natural Science)

基　　金：教育部“高等学校博士学科点专项科研基金”项目(20050700007);国际合作项目(2004KW-13)

摘　　要：为实现开放式数控机床数控系统控制器可移植性和可扩展性要求,提出一种可应用于交流伺服电机的基于虚实映射的闭环控制结构模型,探讨了针对交流伺服电机的混联数控机床闭环结构的控制器改进方法;为提高机床的运动精度,通过激光干涉仪测量了坐标轴正反向定位精度。根据测量结果求出误差值,输入数控系统闭环结构中实现机床的误差补偿。实验结果表明,该方法将机床伺服轴定位误差由27.472μm降低为3.746μm,达到了提高机床精度的目的。To realize the portability and scalability demands of open architecture CNC machine tools, a closed-loop control structural model which can be applied for AC servo motor was presented based on false or true mapping. Then the improvement of controller for AC servo motor used in closed loop control structure on six axis hybrid NC machine tool was discussed. To improve the kinematic accuracy of hybrid NC machine tool, the forward and backward position accuracy of coordinate axis were measured by laser interferometer. The error value was obtained by measurement result and it was input closed-loop structure of CNC system. Error compensation of the hybrid NC machine tool are realized. The experimental results show that it can reduce accumulating position errors of the hybrid NC machine tool servo system from 27. 472um to 3. 746um , and the machine tool accuracy is improved.

关 键 词：混联机床 交流伺服电机 闭环 误差 干涉测量 补偿 

分 类 号：TG519.1[金属学及工艺—金属切削加工及机床] TN24[电子电信—物理电子学]