ALTAIR FEKO & WINPROP 2019 주요기능소개 · 2019-06-06 · FASTER POWER CALCULATIONS FOR IMPRESSED NEAR FIELD SOURCES Calculation of impedances/powers/losses Feko 2018.2 175

김재훈 • 2019년 6월 5일

ALTAIR FEKO & WINPROP 2019 주요기능소개

© 2019 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.

FEKO 2019 주요업데이트내용

• 빠른시뮬레이션• 많은 Near field source를포함하는 Power calculation시간감소

• PO, MoM, MLFMM 시뮬레이션의소요메모리추정

• 효율적시뮬레이션• RL-GO솔버의기능확장

• PEC edges나 wedges에대한회절파예측기능추가

• 유전체계산시 GPU 기능지원

• loads기능개선• SPICE및 Touchstone (.s1p) 설정을 load로추가

• FEM line port에 non-radiating networks회로추가

• HyperMesh and Feko의인터페이스기능강화

Note: Feko and WinProp 2019 uses HyperWorks licensing. Legacy licensing is no longer supported.


WINPROP 2019 주요업데이트기능

• 효율적시뮬레이션• Feko에서계산한 radar cross section (RCS) 값을활용한WinProp 시뮬레이션

• Network planning을위한 Monte Carlo 시뮬레이션과WinProp API지원

• 향상된 HyperWorks와의인터페이스• WinProp documentation을 HyperWorks documentation에포함

Note: Feko and WinProp 2019 uses HyperWorks licensing. Legacy licensing is no longer supported.

Feko-calculated RCS information included in a

WinProp simulation through Feko far field data

(.ffe file) import


FEKO 2019의주요특징


• Improved the efficiency of power calculations for models involving many impressed near field sources.

• Example: A radar antenna placement in a car bumper using 6 near field apertures

FASTER POWER CALCULATIONS FOR IMPRESSED NEAR FIELD SOURCES

Calculation of impedances/powers/losses

Feko 2018.2 175 min

Feko 2019 2 min

→ 89 times faster using Feko 2019

Simulated on a single node with

• 4 x XEON E7-4820

• 10 cores on each CPU

• 40 cores in total

Side view of a radar antenna placement in a car using 6 near field apertures (located in-between the bumper and chassis)

Six near field

apertures

Bumper

Chassis


EDGE & WEDGE DIFFRACTION FOR RL-GO(1)

• Edge & wedge diffraction is being added to Feko's RL-GO solver and should be available early in 2019

• Diffraction from PEC edges & wedges with flat meshes is being added first

• Later extension to curvilinear meshing & dielectrics (RAM coating etc.)

• The TW-ILDC (truncated wedge incremental length diffraction coefficients) method being implemented is more generalised than, for example, UTD and will therefore also be usable for RCS simulations

fringe wave electric current magnetic current


EDGE & WEDGE DIFFRACTION FOR RL-GO(2)

• First validation exampleResults from Feko


RL-GO GPU SUPPORTED FOR DIELECTRICS

• GPU support for RL-GO

• PEC supported since 2018.1

• Dielectrics supported in 2019 (new)

• Supported for

• Flat triangles

• Manual ray launching

• Example of performance improvement

• Optical 4F Correlator (dielectric lenses)16 times faster

• Dielectric lens (from example guide, relatively small)3.64 times faster

Hardware: Nvidia Quadro M1000M (laptop GPU)

Image plane

Fourier plane

Lenses

Plane wave

source

Correlator example

Dielectric lens example


• Solver memory is estimated with the command line option (Feko terminal) --estimate-resource-requirements-only

• Example syntax:

-> car_a.out file shows “Memory estimate for a regular Feko run: “

• Supported solvers: MLFMM, MoM, PO* and FEM*

• For best accuracy, use the same number of processes & nodes for the estimate

• Output requests, such as far fields, are not included in the estimate

* Note: Estimates for a hybrid FEM/MLFMM or a PO/MLFMM solution is not yet supported

ESTIMATION OF SOLVER MEMORY(1)


• Example 1: Missile and patch array

• 4 million unknowns

• 16 processes

• MLFMM

• 1 compute node

• Example 2: Gulfstream aircraft

• 16 million unknowns

• 64 processes

• MLFMM

• 2 compute nodes

ESTIMATION OF SOLVER MEMORY(2)

Example 1

Full run 232.1 GByte

Estimate 222.6 GByte

Example 2

Full run 585.7 GByte

Estimate 523.1 GByte

Example 1: Missile and patch array

Example 2: Gulfstream aircraft


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• A new Feko User Profile is introduced in HyperMesh 2019

• The profile…

• Supports efficient mesh generation and material assignments for Feko in HyperMesh

• Simplifies the interface to only show options relevant to Feko users

• Generates valid mesh elements for Feko

• Definition and assignment of EM materials and properties

• Export of mesh and material data in a Feko native format

IMPROVED INTERACTION BETWEEN HYPERMESH AND FEKO(1)

Feko user profile in the HyperMesh user interface


IMPROVED INTERACTION BETWEEN HYPERMESH AND FEKO(2)

• New .fhm file format for efficient transfer of data between HyperMesh and Feko

• The .fhm file…

• Contains mesh element and material data

• Can be imported and exported by both HyperMesh 2019 and Feko 2019 (introduced in Feko 2018.2)

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Feko .fhm file export in HyperMesh (left) and CADFEKO (right)


• Loads are extended to allow

• SPICE circuit loads

• Touchstone (.s1p) loads

• FEM line ports now support

• non-radiating network

• transmission line

(multiport networks are supported, but only one connection to the geometry / mesh is allowed)

IMPROVEMENTS TO LOADS

Create load dialog with SPICE circuit

and Touchstone file load options

3D view of a FEM line port and schematic view showing the connected network


WINPROP 2019의주요특징


• Step 1: Determine radar cross section in feko

• Feko writes RCS info to ASCII file

RCS IMPLEMENTATION IN WINPROP(1)


RCS IMPLEMENTATION IN WINPROP(2)

Object with RCS information

Object without RCS information

• Step 2 (new): Use RCS info in WINPROP -> Large savings in simulation time


• Documentation

• Converted to HyperWorks system

• Updated where needed

• Available from the launcher utility

• Examples

• Reviewed and updated

• Explanations added to all example projects

• Licensing

• Older non-Altair licensing system discontinued

UPDATED DOCUMENTATION, EXAMPLES, LICENSING


FOR MORE INFORMATION VISITwww.altairhyperworks.com/feko

Documents

ALTAIR FEKO & WINPROP 2019 주요기능소개 · 2019-06-06 · FASTER POWER CALCULATIONS FOR IMPRESSED NEAR FIELD SOURCES Calculation of impedances/powers/losses Feko 2018.2 175