数控成形磨床移动式立柱温度特性分析及数据拟合  

NUMERICAL CONTROL FORM GRINDING MACHINE TEMPERATURE CHARACTE RISTIC ANALYSIS ON MOVABLE UPRIGHT COLUMN AND ITS DATA FITTING

作　　者：胡旭晓[1] 张冰冰[1] 何卫[2] 

机构地区：[1]浙江大学现代制造工程研究所,杭州310027 [2]杭州机床集团有限公司,杭州310022

出　　处：《机械强度》2011年第5期702-707,共6页Journal of Mechanical Strength

基　　金：浙江省重大科技专项(2008C01026-1);博士学科点专项科研基金(200803350028);国家科技重大专项(2009ZX04014-026-04)资助~~

摘　　要：为了研究数控成形磨床中腰导轨移动式立柱温度场特性,采用LabVIEW(laboratory virtual instrument engineeringworkbench)虚拟仪器开发温度实时采集系统,对中腰导轨移动式立柱执行温度场测量,并基于测量数据对立柱进行热态特性分析;根据对温度场数据的分析和研究,针对时间常数跨度较大的多阶指数函数,提出一种逐级递推式拟合算法。根据不同时间常数的指数函数具有不同平衡时间的特点,通过数学变换,采用一阶指数函数的拟合算法进行拟合并逐级递推,分别得到多阶指数函数不同项的时间常数和相应的幅值。拟合曲线与试验曲线相比,此算法简单实用,并具有较高的拟合精度,适合用于移动式立柱温度特性分析与精确建模。In order to study numerical control form grinding machine temperature field characteristics on movable upright column with mid-arranged sliding guide,a real-time temperature acquisition system was developed by LabVIEW（laboratory virtual instrument engineering workbench） and temperature field on column was measured.Based on the analysis of data,a step-by-step recursive fitting algorithm was presented to process multi-order exponential function with large span of time constant.In accordance with the feature that exponential function with various time constants has different equilibrium time,first-order exponential function fitting algorithm was adopted;then time constant and corresponding amplitude of multi-order exponential function through step-by-step fitting.High fitting precision has been proved by comparing the fitting curve with the test curve.The fitting algorithm is suitable for temperature characteristic analysis and accurate modeling of upright column.

关 键 词：温度场测量 温度特性 拟合算法 指数函数 逐级递推 

分 类 号：TG502.15[金属学及工艺—金属切削加工及机床]