Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Measuring the vibration in car panels to reduce metal fatigue

19.03.2003


With each new vehicle, the car industry faces a fresh battle to cut out the unwanted vibrations that cause irritating rattles and the metal fatigue that can cause parts to break, with potentially lethal consequences.

The complexity of the problems persuaded the German automobile giant BMW to team up with smaller partners to find a new way of designing new vehicles. It got together with Belgian companies LMS International, a world market leader in noise and vibration engineering, optics specialist Labor Dr Steinbichler and the Free University of Brussels in the EUREKA project HOLO-MODAL.

HOLO-MODAL has developed a new way of measuring the way car body panels vibrate that combines traditional vibration measurement with the latest holographic techniques.



Traditional measurement of vibration relies on attaching sensors to a test panel. However, it only measures the vibration at the sensor and attaching too many sensors changes the way the panel moves, altering the results. To gain an accurate picture of the whole panel’s response to vibration, you need to be able to see the effect on every part of the panel’s surface at the same time and without affecting the results. This is where holographic techniques come in.

Holographic analysis avoids physical contact with the test panel by illuminating the whole panel with a laser beam. By measuring the light that is reflected by the panel, the system produces a high-resolution 3-dimensional image of the whole surface as it vibrates.

The HOLO-MODAL partners designed a software package that combines traditional and holographic techniques, controls the hardware and shows how to incorporate the technique into early design work. Now car makers can design body panels that are safer, more durable and save development costs spent on vibration and noise control.

The computer models developed from the measurement data allow the effect of any design changes to be predicted and hence they allow users the chance to try out alternative solutions "on the computer" before actually building them In this way the system helps the development of design solutions.

This new technology can also be used to help design a new generation of safer, more durable and quieter domestic and office appliances and consumer electronic products.

Dr Herman van der Auweraer, project leader at LMS International, says none of the partners could have succeeded on their own.

“EUREKA allowed us to define and work towards a common goal of mutual interest," says van der Auweraer. "The partnership combined complementary capabilities and know-how in structural modelling and laser holography. This combination of technologies was critical to the development of the solution; however neither party had both skills available. The synergy was therefore essential for the success of the project."

"It is however also very relevant that the project combined end-user know-how and research direction. This ensured that the research and development efforts were focused on the real problems and not on academic topics.”

Nicola Vatthauer | alfa
Further information:
http://www.eureka.be/holomodal

More articles from Automotive Engineering:

nachricht Improvement of the operating range and increasing of the reliability of integrated circuits
09.11.2016 | Technologie Lizenz-Büro (TLB) der Baden-Württembergischen Hochschulen GmbH

nachricht New algorithm for optimized stability of planar-rod objects
11.08.2016 | Institute of Science and Technology Austria

All articles from Automotive Engineering >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Electron highway inside crystal

Physicists of the University of Würzburg have made an astonishing discovery in a specific type of topological insulators. The effect is due to the structure of the materials used. The researchers have now published their work in the journal Science.

Topological insulators are currently the hot topic in physics according to the newspaper Neue Zürcher Zeitung. Only a few weeks ago, their importance was...

Im Focus: Significantly more productivity in USP lasers

In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.

Even back in the 1990s, scientists were comparing materials processing with nanosecond, picosecond and femtosesecond pulses. The result was surprising:...

Im Focus: Shape matters when light meets atom

Mapping the interaction of a single atom with a single photon may inform design of quantum devices

Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...

Im Focus: Novel silicon etching technique crafts 3-D gradient refractive index micro-optics

A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.

Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...

Im Focus: Quantum Particles Form Droplets

In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.

“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ICTM Conference 2017: Production technology for turbomachine manufacturing of the future

16.11.2016 | Event News

Innovation Day Laser Technology – Laser Additive Manufacturing

01.11.2016 | Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

 
Latest News

Researchers identify potentially druggable mutant p53 proteins that promote cancer growth

09.12.2016 | Life Sciences

Scientists produce a new roadmap for guiding development & conservation in the Amazon

09.12.2016 | Ecology, The Environment and Conservation

Satellites, airport visibility readings shed light on troops' exposure to air pollution

09.12.2016 | Health and Medicine

VideoLinks
B2B-VideoLinks
More VideoLinks >>>