HIRF

CEM for HIRF

A HIRF Analysis Tutorial EMA Technical Staff This series of posts provides background information on HIRF certification requirements and on CEM procedures and analysis that can support the aircraft certification process. Edited by Jennifer Kitaygorsky, PhD HIRF Table of Contents 1: EMA® HIRF Background (IEL) 1.1 The Need For CEM HIRF Evaluations 1.2 Computational Tools […]

EMA3D is used for many major commercial air projects

Background

1: EMA HIRF Background (IEL) 1.1 The Need For CEM HIRF Evaluations 1.2 Computational Tools 1.3 Intent 1.4 Summary of Contents 1.5 Contributors to This Document 2: HIRF Certification Requirements 3: Methods of Modeling Cable Harnesses For LLSC Evaluation 4: Methods of Modeling Aircraft for LLSF Evaluation Chapter 1: Background The development and proper application […]

Recent aerospace certification tasks

HIRF Certification

1: EMA HIRF Background (IEL) 2: HIRF Certification Requirements 2.1 Relevant Requirements Documents 2.1.1 FAA 14 CFR Parts 23, 25, 27, 29 2.1.2 Advisory Circular 20-158 (2007) 2.1.3 ARP5583 Rev A (2010) 2.1.4 DO-160F (2007) 2.1.5 Users Guide for AC/AMJ 20-1317 (1999) 2.2 Application of Certification Documents to CEM HIRF Analysis 3: Methods of Modeling […]

HIRF cable branching

Modeling LLSC

1: EMA HIRF Background (IEL) 2: HIRF Certification Requirements 3: Methods of Modeling Cable Harnesses For LLSC Evaluation 3.1 Canonical Aircraft Model 3.1.1 Figure of Merit 3.1.2 Broadband Source 3.2 Single Cable Investigations 3.2.1 Source Angle of Incidence and Probe Location 3.2.2 Cable Resistance 3.2.3 Cable Diameter 3.2.4 Number of Harnesses 3.3 Multi-Conductor Investigations 3.3.1 […]

Modeling LLSF

In this chapter, we investigate several CEM techniques for modeling electromagnetic fields inside cavities using EMA3D. We start with a simplest canonical model, and move on to a somewhat more sophisticated model of a Boeing 707. The effects of absorption losses and aperture losses on the shielding effectiveness are studied. In addition, statistical studies of electric fields inside the canonical models are conducted at higher frequencies (up to 12 GHz), the conditions for considering the fields as statistical are also presented, and the power balance method is introduced for frequencies too high to be simulated using FDTD.

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