Automotive EMC analysis using the hybrid finite element boundary integral approach

Abstract

The majority of innovative trends in automotive industry today relies on electronic systems. Understanding the electromagnetic behavior of the electronic control units (ECUs) in a vehicle has become an ever increasing concern of automotive manufacturers. Computational Electromagnetic Modeling (CEM) is a cost effective approach that has being adopted by the automotive industry to address electromagnetic compatibility (EMC) problems. Automotive structures are electrically large in nature and the systems required for a complete EMC analysis can be fairly complex. For this reason, there is no single numerical technique that can be used to address all automotive EMC problems. This paper shows how the automotive standard ISO11452-2 can be solved using the hybrid Finite Element Boundary Integral (FEBI) approach. A comparative study indicates that FEBI is faster and requires less computational effort than the Finite Element Method (FEM) for this particular analysis. Recent technology advances on FEBI are also presented showing the great potential of this technique to address automotive EMC problems.

The significance of specific vehicle parts on automotive radiated immunity numerical simulations

“…The first simplifications is with respect to the absorber elements on the walls and roof of the chamber. Even though the absorber elements can be modeled [9], they were replaced by a perfect absorbing boundary condition (FEBI) [13][14][15]. The second simplification is the use of an infinite conductive ground plane replacing the finite ground plane used in the laboratory.…”

“…It is important to note that frequency domain is desired in this (and most) EMC analysis since the output under investigation is electric field as a function of frequency. Frequency domain numerical techniques such as finite element method (FEM) and the finite element boundary integral (FEBI) was also used for this purpose, resulting in faster simulations in the order of just a few minutes [9][10][11][12]. In this work both FEM and FEBI are used considering a convergence criteria of 0.1 V/m, meaning that the software automatically adapts the numerical discretization (mesh) until the difference on the result between meshes are less than 0.1 V/m.…”

An analytical study of curved frequency selective surfaces for shielding applications

“…A planar FSS geometry is initially considered based on a well‐known unit cell topology and the analysis is later extended to nonplanar surfaces. The process starts with the full‐wave simulation of the unit cell 21 and later adopts the FEBI setup 22 for planar and nonplanar FSS arrays. The 3‐D printing technique is then exploited to fabricate the prototypes for different surfaces (cylindrical, elliptical paraboloid, and hemispherical).…”

Miniaturized and Flexible FSS-Based EM Shields for Conformal Applications

“…The proposed PFSS effectively mitigates interference in X-band while maintaining stable incident angular performance up to 60 o in both polarization states. Planar and conformal shields including outward, inward, double curved configurations are designed and analyzed through the simplistic, quick and computationally less intensive full wave Finite Element Boundary Integral (FE-BI) system model [7]. Equivalent circuit model, analytical model and full wave analysis has been carried out to validate the shielding performance of the proposed PFSS.…”

“…FE-BI boundary conditions are assigned to PFSS array/shield and both horn antennas. Owing to the closer boundaries, the overall free space region is reduced which results in faster simulation [7]. These full wave simulations took about 14 hours with 18 GB of RAM on Xeon E5-1650 hexa core CPU clocked at 3.5 GHz.…”