ESI Group : Hyundai Motor Company virtually tests for seat vibrations early in the development process thanks to ESI's Virtual

ESI Group : Hyundai Motor Company virtually tests for seat vibrations early in
        the development process thanks to ESI's Virtual Seat Solution

                    Hyundai Motor Company virtually tests
                 for seat vibrations early in the development
                process thanks to ESI's Virtual Seat Solution

                  Improving the comfort of vehicle occupant

Paris, France - June 27, 2013 - ESI Group, pioneer and world-leading  solution 
provider in virtual  prototypingfor manufacturing  industries, announces  that 
Hyundai Motor  Company has  extended its  usage of  Virtual Seat  Solution  to 
dynamic comfort testing, in order to assess and improve the vibratory  comfort 
of their car seats.

Reducing seat vibrations  greatly contributes  to improving  a seat's  overall 
dynamic  comfort,  by  protecting  the  occupant  from  muscular  fatigue;  an 
important issue for long journeys and  with possible long-term effects on  the 
spine. Han Ji  Won, Engineer, Body  & Trim development  team at Hyundai  Motor 
Company,  declares,  "Since  seats  contain  lots  of  components,  it's  very 
difficult to find the factors that influence the dynamic comfort of the  seat. 
We tried to figure this out  using ESI's Virtual Seat Solutionand reached  our 
goal. This new way of working will help us save money and time effectively."

ESI's  end-to-end   Virtual   Seat   Solution,  dedicated   to   the   virtual 
manufacturing, testing and optimization of seats, has been used by Hyundai for
many years  to conduct  virtual  tests in  several seat  performance  domains; 
including seating  posture  and body  pressure  and foam  hardness.  Recently, 
Hyundai's Body & Trim development team sought to extend their usage of Virtual
Seat Solution to evaluate dynamic comfort.

Traditionally, carmakers  assess  seat  vibrations  by  asking  volunteers  to 
provide feedback on vibrations they experience; a method that delivers  highly 
subjective results and has poor repeatability for many reasons, including  the 
change of  volunteer morphology  with time.  In an  effort to  overcome  these 
drawbacks, Hyundai  engineers  started by  developing  and calibrating  a  new 
dynamic dummy model dedicated to vibratory tests.

With ESI's  Virtual Seat  Solution, Hyundai  engineers now  use their  dynamic 
dummy model to perform complete virtual dynamic tests of an occupied seat. The
first step  is  to simulate  the  dummy sitting  in  the seat.  This  step  is 
mandatory as it  allows determination  of the non-uniform  compression of  the 
foam in cushions of the occupied seat.



 Seat and dummy model used to test virtually dynamic comfort performance with
                            Virtual Seat Solution;
     Graph showing good correlation between real and virtual prototypes.

The second step is to  simulate the vibrations test  with the seated dummy  to 
obtain the transfer function that describes the capacity of the seat to absorb
the vibrations. To achieve good correlation with real testing it is  essential 
that the seat model - in particular the foam - inherits the correct properties
from both the seat fabrication and dummy seating by "chaining" simulations of
each step in the complete process.

Thanks to this fully validated  dummy model, Hyundai performs virtual  dynamic 
comfort testing with ESI's  Virtual Seat Solution  earlier in the  development 
process and can better arrive at the right seat design. The virtual  vibration 
test is accurate and  partly replaces real prototypes,  thus allowing the  car 
manufacturer to develop more comfortable seat designs in less time and at less
cost. Virtual Seat Solution also saves time and increases efficiency by  using 
a single  core  model  of the  seat  to  support evaluation  of  several  seat 
performance domains and to enable design team collaboration.

About Hyundai Motor Company
Hyundai Motor Company is a South  Korean company founded in 1967. The  company 
employs about  75,000  persons worldwide  and  sells vehicles  throughout  193 
countries. According to  the brand  consulting group  Interbrand, their  brand 
value reaches  USD  6 billion  in  2011. Hyundai  Motor  Company  manufactures 
innovative cars from  design to chassis  including package layout  ergonomics, 
powertrain and electronics. They take  into account new technology and  safety 
for new technologies.  Hyundai has  R&D centers  in Namyang  and overseas  and 
gradually increases investment to  develop core technologies for  eco-friendly 
cars, such as  hybrid and electric  vehicles, as well  as advanced  in-vehicle 
electronic technology.

About ESI Group
ESI is a pioneer and world-leading provider in Virtual Prototyping that  takes 
into account the physics of materials. ESI boasts a unique know-how in Virtual
Product   Engineering,   based   on   an   integrated   suite   of   coherent, 
industry-oriented applications. Addressing  manufacturing industries,  Virtual 
Product Engineering  aims  to  replace physical  prototypes  by  realistically 
simulating a product's behavior during  testing, to fine-tune fabrication  and 
assembly processes  in accordance  with desired  product performance,  and  to 
evaluate the  impact on  product use  under normal  or accidental  conditions. 
ESI's solutions  fit into  a  single collaborative  and open  environment  for 
End-to-End Virtual Prototyping. These solutions are delivered using the latest
technologies, including immersive Virtual Reality,  to bring products to  life 
in  3D;  helping  customers  make  the  right  decisions  throughout   product 
development.
The company employs about 1000 high-level specialists worldwide covering  more 
than 40  countries. ESI  Group is  listed in  compartment C  of NYSE  Euronext 
Paris.   

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ESI Group - Media Relations
Céline Gallerne
T: +33 (0)1 41 73 58 46

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