Page

See the most recent stories from DEVELOP3D

The latest from the DEVELOP3D Blog:

Bentley Motors pushes Perceived Quality with aesthetica

Published 05 March 2009

Posted by Al Dean

Article tagged with: simulation, visualisation, bunkspeed, tolerance, tolerance analysis, percieved quality, bentley motors, aesthetica, icona solutions, quality

News just out of Icona Solutions, that Bentley Motors has adopted its aesthetica product to assist the multi-disciplinary team involved in new vehicle design to visualize and agree on gap and flush conditions early in the design process at its design and manufacturing plant in Crewe, England.

It is being used to streamline and improve the process of achieving consistently high perceived quality in the company’s vehicles without negatively impacting development timescales and manufacturing costs.

Perceived Quality is something of a new concept, but the principles are pretty easy to grasp. By improving the fit and form of your product, you can, with careful planning, have that product (it’s by no means limited to the automotive world) achieve a level of aesthetic quality, with over burdening the manufacturing and assembly. Basically, if you get the tolerances right, you can have a repeatable product, that’s of a very high aesthetic quality, with reasonable tolerances (meaning lower cost and effort).

Aesthetica let’s you create the tolerance information using native CAD geometry and conduct stack up analysis to find out different assignments, different conditions effect quality.

The problem is that how in the name of all that’s holy, find that balance. This is where aesthetica comes it. It combines an advance tolerance analysis and stack technology with high-end visualization technology (in the latest releases, courtesy of bunkspeed). This mix allows you to play with tolerances, see how they shift as you tighten or loosen them off in specific places, experiment with control – but at the same time, have a photo realistic representation of how the variance of those tolerances will effect the visual quality of the product. What this also enables is that everyone involved in the process, who typically have very different skills, different language, references and focuses, can concentrate on their specialism, but both can see the effect of their field on each other’s data and specific core concentration areas.

At the same time, you can use the HyperShot integration to find out how those variations and assignments will effect the aesthetic quality of the product.

As the press release says, quoting Jim Shaw, manager of concept engineering at Bentley Motors commented that “We are constantly seeking ways to improve the design processes required to achieve quality in manufacturing. However, the practicalities of getting everyone involved to agree the gap and flush conditions ahead of the Class A surfacing process meant there was a reluctance to commit to them early enough in the design process. This was resulting in agreements only being reached after tooling prove-out models had been milled and stacked, which was leading to loops in the Class A surfacing activity that were eating into the development timeline.

Following the findings of a working group that was formed to look into dimensional management throughout the development process at Bentley Motors, several new techniques were identified and justified, with the implementation of aesthetica being the final piece of the jig-saw puzzle.

“In several pilot projects over recent months it has been clearly demonstrated that aesthetica allows us to truly visualize the effects of all stake-holders proposals, not just for edge conditions but also for the underlying fixing constraints”, said Shaw. “Styling, engineering, quality and manufacturing people can therefore appreciate and understand each other’s requirements and reach agreement at a much earlier stage in the development process than was the case before.

The use of Icona Solutions aesthetica software at Bentley Motors allows the variation in key areas of the vehicle that would occur under manufacturing conditions to be visualized, studied and understood without the need for the manufacture of solid, physical models. These key areas have been agreed with the cross-functional team that is responsible for design approval.

Specific viewpoints that are used by the audit team have been set up in aesthetica so that they review the virtual 3D models in the same way that they view production cars,” explained Patrick Crutchley, Senior Engineer for Surfacing at Bentley Motors. “The improvement in understanding and the promotion of collaboration between departments that this brings has been immense,” he adds.

Add comment (0 comments)

HyperShot 1.8: Decals A Go Go

Published 05 March 2009

Posted by Al Dean

Article tagged with: rendering, visualisation, bunkspeed, hypershot

Rendered in HyperShot, using HDR environment from HDRLighting.com

A little late, but HyperShot 1.8 is out and perhaps the one thing that existing users have been waiting for is finally implimented – decals. or for those of us without funny accents – stickers! This means that you have a great deal more control over how both textures and decals are applied, whether they’re on a single part or across multiple parts. This is current built into non-transparent materials, including Metal, Anisotropic, Metallic Paint, Plastic, Diffuse, and Flat.

Other updates for this release include the ability automatically assign materials when importing data and to control values in dialogs using a dial, rather than tapping in values manually (mouse wheel support for this might have been useful too). There’s also been some work done on the quality of blur when you’re using Depth of Field – which is previous release can be more than a little noisey – this new release should give you a much ‘cleaner’ blur (if that makes any form of sense).

Render by Inovo Design for its client, Motonica

HyperShot is sold on a similar pricing scheme to that of digital cameras – higher resolution and more features costs more. For those working with the Pro version, the batch and render queue has been tweaked to run the render queue in a seperate process (for those using multi-core machines – which makes massive sense in this instance).

With HyperShot 2.0 on its way soon, HyperMove shipping (look out for a full review in the next issue of Develop3D), Bunkspeed are going at it. Big Time. And with Autodesk on the offensive with Showcase both in a technological sense and pricing (it’s been dropped to $995), they need to keep up the momentum they’ve already built in the short two years. HyperShot 1.8 is available for free to existing users and ready. Nice Video below:

Add comment (0 comments)

Blue Ridge looks to cluster technology to boost CFD performance

Published 26 February 2009

Posted by Greg Corke

Article tagged with: amd, cfd, intel, cfdesign, core i7, cluster, windows hpc


Despite the emergence of multiple CPU cores in individual workstations (the standard is now 4 cores) most CAE applications still can’t harness all the available power, probably never will until there’s a major architectural change, and many max out at two cores. The way round this is to use clusters, or to put it simply a series of desktop computers directly connected together with some clever stuff.

Blue Ridge Numericsis the latest CFD vendor to promote its own cluster solution, which works with Microsoft Windows HPC networks. (I’m not hugely familiar with cluster technology, but I do know that Microsoft introduced its cluster technology a few years back, in response to the success of Linux in this sector.)

Blue Ridge’s CFdesign high performance computing (HPC) Module works directly with Windows Server 2008 HPC Edition, and with a little tinkering can turn two or more desktop workstations into a mini cluster. As with a single workstation, there is a limit to the performance gains you can get but Blue Ridge is quoting a maximum reduction in simulation time of 550% for a four node, 16 core setup. From what I can ascertain it looks like there might be a little exaggeration here as the baseline appears to be taken from a single core workstation.

Blue Ridge told me last year that in a single multi core workstation one can expect speed increases in CFdesign of up to 140% (Intel) to 160% (AMD), though I would imagine Intel has now got faster with the introduction of the Core i7, which receives its data directly from system RAM rather than going via a front side bus (FSB).

So by my rough calculations, the performance increase from a single multi core workstation to a four node, 16 core cluster, would be about 350%, which still is not to be sniffed at (I’m sure Blue Ridge will correct me if I’m wrong here).

Percentages aside it’s certainly a very interesting technology and I look forward to test-driving it in the near future. I’d better dust off my copy of Windows HPC cluster for Dummies first though.

www.cfdesign.com

Add comment (0 comments)

Intel Core i7 Processor

Published 24 February 2009

Posted by Greg Corke

Article tagged with: amd, multithreading, intel, cpu, core i7


The big news at the tail end of last year was the launch of Intel’s brand new Core i7 chip. Codenamed Nehalem, the Quad Core chip features a brand new architecture, which represents one, if not the biggest architectural shifts in Intel processors for ten years.

Core i7 systems are shipping now from the specialist systems builders such as CAD2, Xworks and Scan, and we should start to see Core i7-based workstations from the likes of HP, Dell, Fujitsu Siemens and Lenovo in the next month or so.

So what is all the fuss about? There are three major architectural changes to

Core i7 that not only look good on paper, but should have a real impact on the way users work with CAD/CAM/CAE and rendering applications, so let’s have a look at each of these in turn.

FASTER MEMORY

At the heart of this new architecture is a change in the way the chip accesses memory. Instead of the CPU communicating with the memory via the Front Side Bus, Core i7 can receive data directly from the system RAM. If this sounds familiar, that’s because it is, as AMD pioneered this integrated controller strategy with its Athlon & Opteron processors a few years back.

With Intel’s Front Side Bus architecture, which is used on the Core 2 Duo and many generations before, there was a lot more latency when accessing memory. Now with Core i7, applications that access a lot of memory, frequently, will see a benefit. This is why AMD’s Opteron has remained a popular choice with certain CAE users, despite it being slower in most mainstream applications.

The other change in the memory architecture is that the new memory controller has three channels to the RAM which means that Core i7 systems will work best when memory modules are in multiples of three, as opposed to two. This means we are likely to see workstations with 3GB, 6GB and 12GB memory instead of the usual 2GB, 4GB, and 8GB.

HYPERTHREADING

All Core i7 CPUs have four cores as standard, but they also feature a technology called HyperThreading, which simulates additional threads so each chip actually has eight logical cores.

HyperThreading first came to market with the Pentium 4, but was abandoned for the Core 2. It uses spare CPU cycles on each physical core to simulate additional cores, and these can be seen when you bring up the Windows System Performance Dialogue.

The technology only works with certain multi-threaded applications, and can cause confusion when a process assigns itself to a ‘logical core’ even when there is a physical core sitting around doing nothing. Our limited tests show that it does make a small but significant difference in rendering applications such as 3ds Max.

TURBO MODE / OVERCLOCKING

Core i7 features a new Turbo Mode technology which can automatically adjust the speed of the cores dynamically. The chip can literally switch off those cores that are not being used and channel additional power to the remaining cores.

Intel claims that for single threaded applications (of which most CAD applications are) the speed of a single core can be boosted by around 400MHz.

While Turbo Mode can dynamically adjust the speed of the CPU, specialist workstations manufacturers are looking to get more out of each piece of silicon by overclocking or permanently increasing the speed of chips.

With Core i7 and indeed Core2 Duo, Intel has built in a lot of headroom into its chips. Some say this is because it has no real incentive to sell faster CPUs at this moment in time, because it could jeopardise future sales if the performance leap is too high.

The good news is that those in the know are able to get more out of the chips for no additional cost, safely overclocking them by around 20%.

Overclocking has never really been used in the CAD/CAM/CAE sector, simply because reliability has been deemed more important than performance. However, even with standard cooling solutions, specialist workstation vendors are now offering overclocked systems. But this is not pony tailed geeks in bedrooms with soldering irons, the system builders are extremely confident that the silicon will not be damaged by overheating and this is being backed up with three year warranties.

At DEVELOP3D, we don’t expect overclocking to be embraced wholeheartedly by customers, simply for fear of unreliability. However, if confidence grows, and specialist workstation manufacturers continue to push overclocked systems, it will be very interesting to see what impact this has on the Tier One Vendors as the likes of HP, Dell and Lenovo will have to play by the rules and ship systems at Intel’s published speeds. And with the top-end 3.2GHz Core i7 chips costing around £700 it’s not only a performance advantage that we’re talking about here. Specialist system manufacturers are already offering 2.66GHz Core i7 chips clocked up to 3.2GHz for under £300, so price/performance could also become a major differentiator.

CONCLUSION

Core i7 is a huge leap forward for Intel, introducing a number of new technologies, which not only improve efficiency in multi-threaded applications but enhance performance in single threaded applications. As with any new technology, prices are high at the moment, but deals can be had on overclocked systems and expect significant cuts later this year.

www.intel.com

Add comment (0 comments)

Page 560 of 599 pages « First  <  558 559 560 561 562 >  Last »