基于最坏情况分析的星载原子钟射随器电路可靠性分析

The Reliability Analysis on Emitter-Follower Amplifier of Space Atomic Clock Based on Worst Case Analysis

文章基于最坏情况分析理论,利用方根分析(RSS)和蒙特卡洛分析(MCA)方法对星载原子钟中射随器电路进行了数学分析和仿真分析,讨论了元器件参数漂移对输出电压变化影响的规律,分析了电路设计的指标裕度,研究了温度对输出电压的影响。通过数学分析结果和仿真实验分析结果可知,温度对输出电压的影响比较大,RSS和MCA分析方法各有优缺点,同时开展最坏情况分析对于提高星载原子钟电路的可靠性设计具有很好的参考价值和指导意义。

Based on the worst-case analysis theory, this paper presents a mathematical analysis and simulation of emit- ter-follower amplifier of space atomic clock by means of Root-sum squared （RSS） method and Monte Carlo analysis （MCA） method. We discuss the influence on output voltage, which resulted from component parameter variability and analyze the tolerance design in the circuits, and investigate on the variability of output voltage caused by temperature. Simulations show that output voltage variability influenced by temperature was greater than the other factors. And both RSS method and MCA method had advantages and disadvantages in circuit analysis. It is of great significance for space atomic clock to develop re- liability of circuitdesign by worst case analysis.