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.
出处
《机械强度》
CAS
CSCD
北大核心
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~~
关键词
温度场测量
温度特性
拟合算法
指数函数
逐级递推
Temperature field measurement
Temperature characteristic
Fitting algorithm
Exponential function
Step-by-step recursive
