Analysis of real accidents at intersections
Flexible roll forming for rapid production
Error detection and quality assurance in the software lab
Daimler's accident researchers are working on a
sophisticated project for analyzing accidents at intersections. A new
metal-forming process enables rapid, economical production of variable
bodyshell components. And specialists prevent faults in the software of
control units by means of code analysis and software re-engineering.
Beginning tomorrow, you can read about these and other fascinating
topics such as Daimler’s Hybrid offensive for clean and efficient buses
and trucks in the latest issue of Daimler's HighTechReport HTR.
Detailed material, such as films, animations, and expert interviews, is
also available online at www.daimler.com/innovation.
A great many accidents occur at intersections
and turn-offs, and around 80 percent of these are in townships.
Daimler's experts are searching for the reasons and devising solutions.
After analyzing real accidents, they select some typical situations
which they then reconstruct in precise detail in the driving simulator.
Under safe laboratory conditions, the reactions of various test persons
in identical traffic scenarios can thus be observed. Sensors record
reaction times, brake pressures, and steering angles, for example.
Miniature cameras in the simulator vehicle monitor the footwell and the
driver's posture and face; the results of questionnaires are also taken
into account. The goal is an efficient intersection warning system for
everyday use which can reliably identify critical situations, issue
warnings in good time, and if necessary intervene to prevent an
Flexible profiles are on a roll
Deep-drawing or stamping has until now been the
standard method of producing complex sheet metal profiles in automotive
manufacture. The engineers from Daimler have now developed an
innovative, cost-saving process named "flexible roll forming," in which
high-tensile steel sheeting is shaped into bodyshell profiles with
variable lengths, cuts, and cross-sections. The advantages are a
relatively high level of material utilization and minimum tool wear. On
a pilot unit, the experts are currently preparing this process for next
year's series production.
The bug busters
The source code for a control unit would fill
thousands of pages of small print. Who would want to proofread all
that? Special code analysis programs carry out this task in complex
software packages. After investigating the various source codes and
completing the code analysis, the experts begin to revise the software.
As a result of constant further development, software grows
substantially over the course of several years. To integrate new
functions, the Daimler researchers frequently rely on software
re-engineering. In this process, entire programs are reorganized and
algorithms that have proven reliable are put into sustainable and
readily comprehensible form.