第18卷第6期 2010年6月
文章编号
1004-924X(2010)06-1333-07
光学精密工程
Optics and Precision Engineering
容差分析在空间相机测温电路中的应用
王永成1,2，党源源3，徐抒岩1，宋克非1
（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；
Vol.18No., 6
Jun,2010
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）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。研究了测溢电路原理和影响测法。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一14℃～十50℃内的测温精度满足指标要求，测温精度达到士0.3℃C，与改进前的电路相比，性能提高了30倍。
关键词：客差分析；测温电路；空间相机；最坏情况分析法
中图分类号：V475.3;V443
文献标识码：A
doi:10. 3788/OPE. 20101806. 1333
Applicationoftoleranceanalysistotemperature
measurement circuit of space camera
WANG Yong-cheng'-,DANG Yuan-yuan',XU Shu-yan',SONG Ke-fei
(l.Changchun Instituteof Optics,FineMechanicsand Physics,
ChineseAcademyof Sciences,Changchun130033,China;
2.GraduateUniversity of ChineseAcademy of Sciences,Beijing100039,China;
3.Department of Computer Science and Engineering,
Changchun UniversityofTechnolcgy,Changchun130012,China)
Abstract: In order to improve the temperature measurement accuracy of space cameras,the tolerance a nalysis 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 dis-cussed. 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 measure ment 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 ± O. 3'C, 30 times higher than that of the original method, which can meet the requirements of temperature measurement in-14℃-+50C.
收稿日期：2009-06-23；修订日期：2009-07-23. 基金项目：国家重大国防科研基金资助项目