力学环境试验测量不确定度分析  

Measurement uncertainty analysis of dynamic environment test

作　　者：沈凤霞[1] 

机构地区：[1]北京卫星环境工程研究所,北京100094

出　　处：《强度与环境》2010年第1期58-64,共7页Structure & Environment Engineering

摘　　要：航天器力学环境试验数据的测量是完成试验的关键技术之一。任何测量过程都客观上存在测量误差,使测量结果带有不确定性,进行测量不确定度分析的目的是提供评价测量结果的可信度指标。力学环境试验一般需要动态测量,影响测量误差和数据不确定度的因素较多,进行全面准确的分析相对困难。文中通过介绍一些有关测量误差和测量不确定度的基本知识,针对固定的振动环境试验系统,综合所有客观存在的误差因素进行分析计算,给出目前力学环境试验数据测量误差和测量不确定度数值,提高试验数据判读的准确性,满足提供测量误差和测量不确定度指标的实际需求。The data measurement is the key technique of the dynamic environment test. Actually, measurement error exists in any process of measurement, and results in the data uncertainty. The purpose of uncertainty analysis is to provide the reliability for estimating the measurement result. Generally, the dynamic measurement is used in dynamic environment test. There are many factors affecting the error and uncertainty of measurement. It is difficult for full analysis. In this paper, some basic knowledge about the error and uncertainty of measurement will be presented. Based upon a fixed vibration test system and analysis on all the subsistent error factors, the value of error and uncertainty of measurement are computed to improve accuracy of data estimation and meet test requirement.

关 键 词：力学环境试验 测量误差 测量不确定度 不确定度分析 

分 类 号：V416[航空宇航科学与技术—航空宇航推进理论与工程] O329[理学—一般力学与力学基础]