基于移动最小二乘的数控龙门导轨磨床定位误差建模及补偿技术  

Positioning Error Modeling and Compensation for CNC Gantry Guideway Grinder Based on MLS

作　　者：杨昌祥 王立坚 何川 范开国[2] 杨建国[2] 

机构地区：[1]贵阳险峰机床有限责任公司,贵阳550025 [2]上海交通大学,上海200240

出　　处：《中国机械工程》2015年第9期1147-1151,共5页China Mechanical Engineering

基　　金：国家自然科学基金资助项目(51275305);国家科技重大专项(2011ZX04015-031);高等学校博士学科点专项科研基金资助项目(20110073110041);中国博士后科学基金资助项目(2014M550234);2013年度上海市引进技术的吸收与创新计划资助项目(13XI-07)

摘　　要：为提高国产大型龙门导轨磨床精度,针对大型龙门导轨磨床的定位误差,应用移动最小二乘法建立误差模型。移动最小二乘法是形成无网格方法逼近函数的方法之一,生成的曲线曲面具有精度高、光滑性好等许多优点,其建模精度远高于普通最小二乘法(LS)。为实现大型导轨磨床的在机实时补偿,应用外部坐标偏移法对大型龙门导轨磨床定位误差进行补偿。补偿后,大型龙门导轨磨床精度提高89.3%,有效提高了该龙门导轨磨床的加工精度。In order to improve the accuracy of gantry guideway grinder,the positioning error mod-el of the gantry guideway grinder was established using MLS method.The MLS method was a mesh-less method for curve fitting.The error curve fitted by the MLS has many advantages of high preci-sion and good smoothness.The modeling accuracy of the MLS is much higher than that of least squares.In order to realize the real-time compensation for CNC gantry guideway grinder,the external coordinate offset method was used to compensate the geometric errors of the guideway grinder herein. Experimental results show that the accuracy of the gantry guideway grinder is improved by 89.3%compared to without compensation.The accuracy of the gantry guideway grinder is improved greatly.

关 键 词：移动最小二乘法 导轨磨床 几何误差 实时补偿 

分 类 号：TH161[机械工程—机械制造及自动化]