蒙特卡洛方法在GPS不确定度评定中的应用  

Application of monte carlo method in evaluation of GPS uncertainty

作　　者：尚俊峰[1] 赵凤霞[1] 张琳娜[1] 

机构地区：[1]郑州大学机械工程学院,郑州450001

出　　处：《机械设计与制造》2011年第9期68-70,共3页Machinery Design & Manufacture

基　　金：国家自然科学基金(50975262);河南省基础与前沿技术研究计划项目(072300440120);河南省教育厅自然科学研究计划项目(2010B460020)

摘　　要：不确定度的概算是新一代GPS测量不确定度管理体系的核心内容。《测量不确定度表示指南》提供的评定方法是基于不确定度传播率。可是当不确定度分量间的相关系数以及有效自由度难以有效确定时,依据GUM提供的方法就会遇到很大的困难。采用蒙特卡洛方法对新一代GPS不确定度进行了分析和概算,给出了评定复杂模型测量不确定度的原理和评定步骤,并对GUM法和蒙特卡洛法两种评定方法进行了对比,用实例验证了蒙特卡洛方法的实用性和准确性。Uncertainty budget is the core of management for the next GPS measurement uncertainty.The method introduced in＂Guide to the Expression of Uncertainty in Measurement＂for evaluating measure-ment uncertainty is based on transmission rate of uncertainty.However,the methods provided by the GUM may be not easy to determine the coefficient of correlation among components as well as the effective de-grees of freedom.Based on analyzing and rough calculating the next GPS measurement theory with monte carlo method,the principle and evaluation steps of evaluation of complex models uncertainty is proposed and the two evaluation methods of GUM and monte carlo are compared in it,which experiment results have proved the monte carlo method is feasible and accurate.

关 键 词：蒙特卡洛法 不确定度 产品几何技术规范 

分 类 号：TH16[机械工程—机械制造及自动化]