In May 2010 I wrote about a couple of personal transport projects in a post titled Segway to U3-X. Naturally, the Segway Personal Transport (PT) is in production with a variety of options and models. Honda’s U3-X, though cool and seemingly quite practical, as far as I know has yet to see a showroom floor. Perhaps the U3-X was just a platform for Honda’s engineers to research mobility possibilities. … Read More
Admittedly, I’m a bit biased. After 20+ years in the EDA industry, I’ve developed increasing confidence in modern simulation technology. In short, I generally believe what SystemVision tells me about the systems I analyze. With the right models and simulation settings, I am confident my simulation results will closely match lab measurements on prototype hardware.
Part of building confidence is simply … Read More
Tags: Mechatronic, Modeling, EDA
This final blog in this series focuses on what is sometimes the most ethereal of CFD modelling arts, where and how to define your peripheral boundary conditions. A fancy phrase but in reality no more than deciding where the interface is between what you model and what you don’t. Heat is contemptuous of such divisions, it will spread out from it’s source and keep on spreading via convection, conduction … Read More
Tags: modelling, boundary condition, CFD, BC, Model, Modeling, Electronics Cooling
Any simulation technology based on an approach of subdividing a 3D model into many tessellated control volumes (e.g. the finite volume method) will be affected by the shape and size of those ‘mesh cells’ or ‘grid’. How fine should the mesh be to resolve the physics of the model being simulated? Good question. I used to ask my art teacher how to draw curtains. You don’t have to be a comic to figure out … Read More
Tags: modelling, Electronics Cooling, CFD, Model, Modeling, Grid, Mesh
Sometimes the ability to apply artistic interpretation of your virtual product to your simulation model of it is limited or dictated (take your pick) by the available capabilities of that simulation tool. CFD simulation is quite a young technology, application to electronics cooling newer still, a mere 21 years old. Always pushing the limit of available computing resource, always adapting to the ever … Read More
Tags: modelling, compact model, Electronics Cooling, BCI, Model, Modeling, Fan
Never trust a TLA (three-letter acronym) or those who use them, unless the abbreviation provides some value in terms of repetitive usage or is accepted as an industry standard. Too often TLAs are used as a screen between those who are listening and the incompetence of the person talking. TIGs (thermally insignificant geometries) as a TLA is neither useful nor accepted, I just made it up. Thermally … Read More
Tags: modelling, Electronics Cooling, flomcad, CFD, Model, Modeling, MCAD
Wiki quote: “A grille is an opening of several slits side by side in a wall or metal sheet or other barrier, usually to let air or water enter and/or leave but keep larger objects including people and animals in or out.” For electronic products that need to be kept cool, getting cool air in through grille work is commonplace, thermal designers love them, EMC/EMI designers don’t. For such products, keeping … Read More
Tags: science, CFD, Electronics Cooling, art, Modeling, modelling, Model
Considering that CFD (Computational Fluid Dynamics) is an advanced mathematical method for predicting fluid flow and heat transfer using a computational software approach I find it paradoxical that it is often as much an art as it is a science. A model by its very definition is a representation of something. A computer model is a virtual representation of a system (e.g. a laptop, a rack mounted server, … Read More
Tags: science, CFD, art, Modeling, modelling, FloVENT, Model
To begin this series on fundamentals of signal integrity, lets start at the very beginning. Before you start doing any type of simulation or analysis, what do you have to do first, what information do you have to know? Your design probably has thousands of nets, are you going to simulate all of them?? Probably not, there’s not enough time for that and truthfully, it’s not really necessary. The first … Read More
Tags: Modeling, IBIS, SI, Critical Nets, Edge Rate, Signal Integrity, high frequency nets, HyperLynx, EMI, Fundamentals
If you do any kind of multi-gigabit SerDes design, you’ve probably come across the acronym, AMI - Algorithmic Modeling Interface. AMI is essential a fast behavioral model of multi-gigabit transmitters and receivers. Standard IBIS models are good for regular switching edges up to some surprisingly fast speeds, but when you start adding in things like pre-emphasis, and equalization on those edge, … Read More
Tags: Multi-Gigabit, Models, SERDES, ATM, Xilinx, Eye Diagram, AMI, IBIS 5.0, SPICE, V5, Modeling, HyperLynx, Virtex 5, Webinar, IBIS
Jim Martens
John Day
J VanDomelen
Nazita Saye
Michael Ford
Colin Walls
Tom Fitzpatrick
Patrick Carrier
Mark Laing
Travis Mikjaniec
Christopher Hallinan
Bernard Sutton