容差分析在空间相机测温电路中的应用  

Application of tolerance analysis to temperature measurement circuit of space camera

作　　者：王永成[1,2] 党源源[3] 徐抒岩[1] 宋克非[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033 [2]中国科学院研究生院,北京100039 [3]长春工业大学计算机科学与工程学院,吉林长春130012

出　　处：《光学精密工程》2010年第6期1333-1339,共7页Optics and Precision Engineering

基　　金：国家重大国防科研基金资助项目

摘　　要：为了提高空间相机测温电路的测温精度,提出用容差分析法研究测温电路的性能。研究了测温电路原理和影响测温精度的各种因素;讨论了电路容差分析的各种方法,比较了它们的优缺点和适用范围,并确定了本课题采用的分析方法。应用最坏情况分析法对测温电路进行了容差分析。根据分析结果提出了一种提高测温精度的方法,并进行分析验证。验证结果表明:改进后的测温电路在-14℃～+50℃内的测温精度满足指标要求,测温精度达到±0.3℃。与改进前的电路相比,性能提高了30倍。In order to improve the temperature measurement accuracy of space cameras,the tolerance analysis is applied to temperature measurement circuits.The principle of a temperature measurement circuit is studied and a variety of influencing factors of temperature measurement accuracy are discussed.Several kinds of tolerance analysis methods are described,and their respective advantages and disadvantages are compared.Then the worst-case analysis method is chosen to analyze the tolerance of the temperature measurement circuit.Finally,a novel method for improving temperature measurement accuracy is proposed according to the analysis results.After validating proposed method,it is shown that the measurement accuracy of the improved temperature measurement circuit is ±0.3℃,30 times higher than that of the original method,which can meet the requirements of temperature measurement in-14 ℃-＋50 ℃.

关 键 词：容差分析 测温电路 空间相机 最坏情况分析法 

分 类 号：V475.3[航空宇航科学与技术—飞行器设计] V443