A fresh look: a more economic approach to HIRF certification

G. Fuller, Andrew J. Poggio
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Abstract

An in-depth review of electromagnetic aircraft coupling models and recent experimental results from 1984 to 1995 provides a systematic approach for conducting HIRF certification. This approach uses models developed by NIST and LLNL to characterize the internal HIRF environment of an aircraft. Recent measurements on 707, 757, and GA/business aircraft conducted by NSWC, NIST, LLNL, and AF Phillips Labs suggest ways to reduce the dimensions of the test space. The principle dimension of this approach is frequency. Analysis is used to predict the expected fields in each of three frequency regimes where the coupling phenomena are unique. Analysis and spot testing can be used to eliminate or reduce the required testing in each of these ranges. Considerable savings in test time, complexity and costs can be achieved by collapsing the remaining dimensions of power density and illumination. Specifically, equivalent internal illumination by much lower power sources can be substituted for high powered external illumination. The number and choices of polarization and required aspect angles can be reduced as well using this approach.
全新的视角:HIRF认证的更经济的方法
对1984年至1995年电磁飞机耦合模型和最近实验结果的深入审查为进行HIRF认证提供了系统的方法。该方法使用NIST和LLNL开发的模型来表征飞机的内部HIRF环境。NSWC、NIST、LLNL和AF Phillips实验室最近对707、757和GA/商务飞机进行了测量,提出了降低测试空间维度的方法。这种方法的主要维度是频率。分析用于预测耦合现象独特的三个频率区域的预期场。分析和现场测试可用于消除或减少这些范围内所需的测试。通过缩小功率密度和照明的剩余尺寸,可以大大节省测试时间、复杂性和成本。具体来说,低功率光源的等效内部照明可以取代高功率外部照明。使用这种方法可以减少偏振的数量和选择以及所需的角度。
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