丝杠精度动态检测系统设计及其不确定度分析  

Design and Uncertainty Analysis of Dynamic Detecting Measurement System for Lead Screw Accuracy

作　　者：孟兆新[1] 李志伟[1] 孙丽萍[1] 徐宇[2] 

机构地区：[1]东北林业大学机电工程学院,黑龙江哈尔滨150040 [2]中国船舶重工集团公司第703研究所,黑龙江哈尔滨150036

出　　处：《大连交通大学学报》2010年第1期1-4,共4页Journal of Dalian Jiaotong University

摘　　要：针对传统的丝杠精度静态检测方法测量效率低、人为误差大的特点,设计了以双频激光干涉仪作为长度基准,圆光栅作为角度基准的丝杠精度动态检测系统.根据行业相关标准,简化行程变动量的求解过程,对丝杠的导程误差进行描述,并通过轴向位置数学模型对检测系统的不确定度进行了分析,为判定系统的检测精度提供了依据.试验表明系统可以对丝杠副进行准确快速的精度检测,其不确定度为2μm/m.Owing to the defects of static detecting measurements of lead screw which are widely applied at present, an improved dynamic detecting system is designed. The system employs a two-frequency laser interferometer as length benchmark and a round raster as angle benchmark. According to the existing standards, the solution procedure of stroke argument is simplified to reduce computation. Furthermore, uncertainty is analyzed based on axial position model in order to evaluate detection accuracy of system. Experiment results shows that the system can dynamically detect lead screw with high speed and accuracy with an uncertainty of 2 μm/m.

关 键 词：双频激光干涉仪 丝杠副 导程误差 不确定度 

分 类 号：TH133[机械工程—机械制造及自动化]