COMPUTER MODELING & SIMULATION DEMONSTRATIONS
Tuesday, March 17 - 10:00 AM – NOON
Topic: Using Simulated EMC Instruments to Develop, Edit, and Validate EMC Test Routines
Presenter: Joe Tannehill, ETS-Lindgren, Austin, TX, USA
Automating the EMC test process has the benefits of improving measurement accuracy and repeatability while also increasing test throughput. EMC testing is complex and requires multiple instruments to work in unison so that data gathered is coherently assembled to determine compliance of a device under test.
Integrity of the test setup is typically done with system checks where a known signal is injected at some point in the system and compared with expected results. This approach is great for validating the entire hardware/software signal chain. Using virtual instruments, the software side of the system can be validated before assembling the instrumentation. This is a significant time saver and allows for scenario testing without tying up test equipment and chamber time.
This demonstration will show how instrument simulation can be used to setup system checks as well as validate actual EMC emissions and immunity tests.
Topic: ERC and SRC for Large-Scale SI Engineering
Presenter: Jiang Li, Cadence Design Systems, San Jose, CA, USA
Software demo for advanced layout checks, ERC (electrical rule check) and SRC (simulation rule check) is proposed. ERC is geometry-domain based check showing trace impedance, coupling and reference; SRC is electrical-domain simulation based check showing Tx/Rx/NEXT/FEXT waveforms. ERC/SRC can handle large PCB designs, and provide insight into PCB’s SI performance.
This is software demo can be considered as a follow up for presentation ‘PCB check for large scale SI/PI engineering’ at 2014 IEEE EMC SI/PI symposium by the same author.
Tuesday, March 17 – 2:00 PM – 4:00 PM
Topic: Numerical Modeling of Crosstalk
Presenter: Scott Piper, General Motors, Milford, MI, USA
Unintended electromagnetic coupling, also known as crosstalk, causes a great deal of the EMC problems during product EMC testing. Crosstalk can never be eliminated especially since there is an increasing demand for smaller products so often trade-offs are made which can be investigated using numerical modeling tools. This demonstration will show how crosstalk in wiring and printed circuit boards can be modeled using various numerical modeling methods. Issues will be discussed such as which methods to use, simplification, and meshing requirements.
Wednesday, March 18 - 9:00 AM – 11:00 AM
Topic: Using Method of Moments for EMC and SI Application
Presenter: Bruce Archambeault, Archambeault EMI/EMC Enterprises, Four Oaks, NC, USA and Missouri University of Science and Technology, Rolla, MO, USA
The Method of Moments (MoM) is one of the most common and popular electromagnetics simulation techniques being used. While all simulation techniques have their strengths and their weaknesses, MoM has proven to be very robust and extremely effective for certain types of simulation problems. This demonstration will use CONCEPT from Technical University of Hamburg-Harburg to demonstrate using MoM simulation technique for EMC and SI applications.
Thursday, March 19 – 9:00 AM – 11:00 AM
Topic: Modeling the Shielding Effectiveness Using Integral Equation Techniques: Shielding Effectiveness of Aircraft Structures with Carbon-Fiber Reinforced Composite Materials
Presenter: Dr. M. H. Vogel, Altair Engineering Hampton, VA, USA
When lightning or high-intensity radiated fields hit an aircraft, currents will be induced in interior cable harnesses and be injected into electrical systems. This is especially a concern when the aircraft is made of composite materials, since those materials offer less shielding. We will demonstrate how the complete problem can be simulated efficiently and reliably.