09 10 201514 Simulation not fender benders Real time behavior safety networking developers of vehicle electronics have to deal with with all of these complicated requirements and application scenarios Many electronic systems in automobiles play an important role for driving safety and this means their functioning must be care fully validated This costs both money and time a commod ity that is usually in short supply in vehicle development The validation of a driver assistance system or even just one elec tronic function within it takes weeks of painstakingly logged test drives as part of the approval process The V model still the gold standard in the management of complex development projects stipulates at least in theory a strict sequence of steps first everything is nicely defined then developed and then tested with one step coming neatly after another And if a flaw is revealed in the testing phase the developer has to start all over again As the approach takes a great deal of time developers are al ways trying to figure out how to pull portions of the approval tests ahead in the time sequence One result of this thinking is hardware in the loop HiL which is already well estab lished as an approach for accelerating the development pro cess It involves developers operation of a control device s real hardware in a virtual environment A test environment produces sensor signals and similar stimuli At the same time a phalanx of measurement devices registers the responses of the control units to the virtual environment An evaluation of the measurements shows whether the control unit is really do ing what the specifications say it should do and no more For example engineers note whether the lane departure warning system actually keeps the car in its lane whether it can dis tinguish between the yellow lane markings and white ones and whether the car stays calmly and precisely in the center Tests using virtual prototypes are considered a proven way to shorten development time This works in reverse as well when the environment of the real automobile not the electronics is simulated 36 Entwicklung Virtuelle Testfahrt Simulation statt Rempler Tests mit virtuellen Prototypen gelten als erprobtes Mittel die Entwicklungszeit zu verkürzen Das funktioniert auch umgekehrt Nicht die Elektronik wird simuliert sondern die Umgebung des echten Autos automotiv IT 06 07 2015 Virtuelle Testfahrten ermöglichen die verschiedensten Szenarien auch unter Einbeziehung von intelligenten Fahrerassistenzsystemen und deren Wirkung Dank Panoramaprojektionen l s e sich diver e Verkehrssituationen nahezu realistisch nachstellen echte Tests können teilw is entfallen Virtual test drives allow different scenarios including ones that show how intelligent driver assistance systems function STORY

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