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Simulation of Conductive and Radiated Emission for Off and On-Board Radio Receivers According to CISPR 12 and 25.

Altair Engineering-Aseim Elfrgani, C. J. Reddy
Altair ProductDesign, Inc-Dipen Das
  • Technical Paper
  • 2020-01-1371
To be published on 2020-04-14 by SAE International in United States
Two of the most commonly exercised standards by Electromagnetic compatibility (EMC) automotive engineers are CISPR 12 and CISPR 25. Both are developed and established by EMC regulatory committee named as CISPR (International Special Committee on Radio Interference) which is a part of International Electrotechnical Commission (IEC). While CISPR 12 is imposed as a regulation to ensure uninterrupted communication for off-board radio receivers, CISPR 25 is often applied to ensure the quality of services of on-board receivers. Performing these tests becomes challenging until the vehicle is prototyped which may prolong the production time in case of failure or need for modification. However, conducting these tests in simulation environment can offer more time and cost-efficient way of analyzing the electromagnetic environment of automotive vehicles. In this paper, a computational approach is proposed in order to predict electromagnetic disturbance from on-board electronics/electrical systems using 3D computational electromagnetic (CEM) tool; Altair Feko. The presented study elaborates on radiated and conductive emission simulations performed for both vehicular and component/module level EMI testing according to CISPR 12 and 25. Simulation setup…
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Development of Online Fuel Cell High Frequency Resistance Monitor Controller

Tongji University-Tiancai Ma, Weikang Lin, Jiajun Kang
  • Technical Paper
  • 2020-01-1177
To be published on 2020-04-14 by SAE International in United States
Proton exchange membrane fuel cell (PEMFC) system is expected to be the next generation vehicle powertrain. However, water management is still the main problem which directly affects the performance, reliability and durability in PEMFC system. To ensure the accurate water content estimation, High Frequency Resistance (HFR) is the most representative indicator in laboratory. The HFR is calculated by detecting the Alternating Current (AC) voltage response of fuel cell under the excitation of 1k Hz AC current. The voltage level of the AC excitation affects the measurement of HFR. Generally, 5mV AC excitation is used to measure HFR for the fuel cell with an output voltage between 0.6-1V. So, online HFR monitor is a big challenge for vehicle application, due to its low Signal/Noise Ratio (S/N), poor Electromagnetic Compatibility (EMC) environment, high common mode voltage and several hundred cells. In this work, an online fuel cell HFR monitor controller is developed. Firstly, in order to amplify the weak AC voltage signal, the high voltage and high precision operational amplifier and active filter are used. High precision…
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EMC Laboratory RF Radiated Emission Report for Passive Radio Frequency Identification (RFID) Tags

G-18 Radio Frequency Identification (RFID) Aero Applications
  • Aerospace Standard
  • AIR5747A
  • Current
Published 2020-02-28 by SAE International in United States
This paper contains RF radiated emission and susceptibility data from passive Radio Frequency Identification (RFID) tags and readers operating at 13.56 MHz, 915 MHz, and 2.45 GHz. Laboratory test procedures incorporated the methods of RTCA DO-160D (test procedures for aviation electrical/electronic equipment) and DO-233 (test procedures for consumer portable electronic devices (PEDs)). Only one commercially available system was evaluated per established operating frequencies.
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Electronic Engine Control Design Guide for Electromagnetic Environmental Effects

E-36 Electronic Engine Controls Committee
  • Aerospace Standard
  • AIR5060B
  • Current
Published 2020-02-26 by SAE International in United States
The purpose of this document is to provide reference material for establishing compatibility of electronic gas turbine engine control systems and associated components with the electromagnetic environment and achieving compliance with associated airworthiness requirements.
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Immunity to Radiated Electromagnetic Fields - Bulk Current Injection (BCI) Method

Electromagnetic Compatibility (EMC) Standards
  • Ground Vehicle Standard
  • J1113/4_202002
  • Current
Published 2020-02-24 by SAE International in United States

This SAE Standard defines a method for evaluating the immunity of automotive electrical/electronic devices to radiated electromagnetic fields coupled to the vehicle wiring harness. The method, called bulk current injection (BCI), uses a current probe to inject RF onto the wiring harness in the frequency range of 1 to 400 MHz. BCI is one of a number of test methods that can be used to simulate the electromagnetic field.

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Emergency Vehicle Sirens

Emergency Warning Lights and Devices Standards Committee
  • Ground Vehicle Standard
  • J1849_202002
  • Current
Published 2020-02-10 by SAE International in United States
This SAE Recommended Practice provides laboratory test procedures, requirements, and guidelines for electronic siren systems with a single loudspeaker, and electromechanical sirens for use on authorized emergency vehicles, which call for the right-of-way. Test procedures and performance requirements for individual system components are not included in this version. Results obtained for a siren system with a speaker array that is greater than 0.5 m in any dimension shall apply to the system only when the array is in the same spatial configuration as tested (i.e., the same speaker separation and orientation).
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Low-latency cameras, onboard computing combine to offer advanced operator assistance

SAE Truck & Off-Highway Engineering: February 2020

Ken Lindfors
  • Magazine Article
  • 20TOFHP02_07
Published 2020-02-01 by SAE International in United States

Modern industrial machines have been using cameras for years to improve visibility and eliminate blind spots. With the introduction of Ethernet cameras, an accepted standard for networked computing, more complex and cost-effective camera configurations can be implemented into on- and off-highway vehicles.

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Design and Handling Guide Radio Frequency Absorptive Type Wire and Cables (Filter Line, AS85485)

AE-8A Elec Wiring and Fiber Optic Interconnect Sys Install
  • Aerospace Standard
  • AIR4465A
  • Current
Published 2020-01-31 by SAE International in United States
This document presents design and application information which will allow optimized utilization of filter line wire and cable purchased to AS85485. Filter line wire is defined and design information is presented. The electrical and mechanical performance characteristics of the wire, along with recommended harnessing methods and techniques, are also presented.
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Splicer, Fusion, Fiber Optic, Aerospace, Explosion-Proof (Type I)

AS-3 Fiber Optics and Applied Photonics Committee
  • Aerospace Standard
  • AS6479/1
  • Current
Published 2020-01-30 by SAE International in United States
This detail specification defines fiber optic fusion splicers acceptable for the installation and repair of a wide range of optical fibers and cables with virtually no insertion loss in hazardous environments (potentially flammable or explosive atmospheres, Type I), particularly aerospace applications. The requirements for acquiring the splicer described herein shall consist of this specification and the latest issue of AS6479.
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Upper Frequency Measurement Boundary for Evaluation of Shielding Effectiveness in Cylindrical Systems

AE-4 Electromagnetic Compatibility (EMC) Committee
  • Aerospace Standard
  • AIR1700A
  • Current
Published 2020-01-30 by SAE International in United States
This AIR points out that above a frequency called the “transition frequency,” variances associated with the shielding effectiveness measurements can become large. It includes the derivations to demonstrate this. This fact should be taken into account when designing shielding for use above the transition frequency.
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