/ 115 Vehicle Testbeds for NVH Testing The main purpose of noise, vi��ration and harshness ��NVH�� testing is to optimize the interior and e��terior noise of the vehicle, as well as to ensure the acoustic ��uality. It is possi��le to evaluate the ��ehavior of different e��ternal or internal vehicle impulses on the e��citations on the chassis dynamometer for different constructions of the drivetrain or chassis configurations. CHARACTERISTICS The com��ination of reduced noise emissions ��y design, high rigidity and precise road load simulation allows for highly efficient NVH development on the vehicle testbed. These combined advantages are essential for dynamic, tip-in and ��pass-��y-noise�� tests. Motor enclosures of the water-cooled main motors reduce the acoustic emissions of the vehicle test��ed. Rollers and frames are especially designed with regard to NVH applications and e��uipped with acoustic damping material. E��changea��le roller surfaces repicate all types of road te��tures. In addition to that, the vehicle test��ed can ��e upgraded with a second a��le for e��ample for parallel hy��rid and four-wheel drive vehicles. Configurations of up to four motors are possi��le. In this case, the vehicle test��ed controller VECON monitors the vehicle and provides precise control and monitoring functions for various test modes for all NVH vehicle test��ed configurations. Pit shutters or work platforms underneath the vehicle enable comfortable access to the vehicle components. This allows the ��uick and easy realization of modifications without changing the vehicle restraint. Therefore, the modifications can ��e evaluated using identical test conditions. APPLICATION The vehicle testbed is designed to e��amine noise and vi��ration ��ehavior as well as in��uences from the vehicle ��ody, suspension or other vehicle components. The intention is mainly to check noise and vibration thresholds on the powertrain, chassis and other related components. BENEFITS AT A GLANCE �� Scala��le and ��ready-to-��uild�� hardware and software for noise and vibration tests per wheel, a��le or vehicle �� E��tremely low noise emissions thanks to structural measures ��e.g. motor enclosures, water cooling and suita��le roller design�� in the testbed design �� Simulation of real road te��- tures thanks to e��changea��le roller surfaces, also for speeds over 200 kph �� ��ecades of e��perience in cooperation with planning engineers, construction and acoustic construction companies ��esting of pass- by-noise on the AVL vehicle testbed AVL ROADSIM ��V�� ��x�� LIGHT TRUCK Microphone noise recording on a passenger vehicle in an ��V�� chamber
Solutionskatalog_2017_E
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