【摘要】 星载设备电源线传导发射的测量不确定度评定较为复杂,本文在对10kHz~10 MHz电源线传导发射测量(CE102)的不确定度来源进行分析的基础上,以某星载设备作为受试设备,研究了10kHz~10 MHz电源线传导发射的测量不确定度评定方法。首先,阐述了10kHz~10 MHz电源线传导发射测量的测量原理,在分析测量原理的基础上,确定了测量活动中的不确定度来源主要为测量的重复性、仪器的计量性能及阻抗不匹配等引入的不确定度分量等。其次,建立了测量不确定度评定的数学模型,并对各测量不确定度分量进行了标准测量不确定度评定。最终,采用GUM法对10kHz~10 MHz电源线传导发射的测量结果进行了扩展不确定度计算。结果表明,某星载设备CE102测量结果的扩展不确定度为2.7dB。研究结果对电磁兼容实验室建设中的测量系统开发、实验室测量能力的提升以及测量结果质量的保障具有积极的作用,对其他军用平台电子设备的CE102测量不确定度评定具有重要的参考价值。更多还原

【Abstract】 Measurement uncertainty assessment of spaceborne equipment’s power line conducted emission is very complex.Based on analysis uncertainty sources of the power line conducted emission measurements from 10 kHz to10 MHz(CE102),taking a spaceborne equipment as test equipment,measurement uncertainty methods of CE102 is studied.Firstly,the measurement principle of CE102 is introduced.On the basis of analyzed the measurement principle,the main uncertainty source including the measurement repeatability,instrument’s measurement performance and impedance mismatch,et al,is determined.Secondly, mathematical model of measurement uncertainty is established,and standard measurement uncertainty of each component is assessed.Finally,the expanded uncertainty of CE102’s measurement results is calculated by GUM method.The results show that the expanded uncertainty of a spaceborne equipment’s CE102 measurement results is 2.7 dB.The results give a positive effect for the EMC measurement systems development in laboratory building,improve the laboratory measurement capability and protect the quality of the measurement results,and it has important reference value for the CE102’s measurement uncertainty assessment of electronic equipment on other military platform.更多还原