Abb. 1: Vergleich der Vertikalbeschleunigung am hinteren Radträger. Fig. 1: Comparison of vertical accelerations on rear wheel carrier.
Abb. 2: Vergleich der Dehnungen an einem hinteren Fahrwerkslenker. Fig. 2: Comparison of strains acting on a rear suspension arm.
vehicles and their components therefore undergo in-depth
test conducted on a test facility has the potential of providing
functional and endurance testing in the Technical Center 41
faster results, higher repeatability and improved transparency
of the German Armed Forces (WTD-41) based in Trier prior
of test data. To this end, two different test rig variants were
to their hand-over to the different military units, in order to
evaluated – one a tire-coupled four-poster test rig and the
reveal potential system and safety problems. To reduce the
other an axle-coupled full-vehicle test rig, each with six
time required for these tests, WTD 41 and Fraunhofer LBF are
degrees of freedom at each wheel.
making use of the capabilities of test rigs for investigating the durability of land vehicles and their components under actual service conditions ahead of the tests on a test track. In cases where components or subassemblies are found to be defective and require a change in design, testing on a test facility is a fast and cost-efficient alternative to a repetition of the endurance run on a test track. Summary Using the example of protected vehicles type Mungo, the aim of this research project, conducted in partnership with the Technical Center for Automotive and Armored Vehicles of the German Armed Forces (WTD 41) based in Trier, was to compare driving tests conducted on a test track with tests on a test facility, with a view to ascertaining whether the quality of the results achieved on these facilities justifies the use of these facilities to replace driving tests conducted on the test track. This was done in the light of the fact that a
Mike Müller (Wehrtechnische Dienststelle WTD 41)
„Die zusammen mit dem Fraunhofer LBF in Darmstadt durchgeführten Unter suchungen vermittelten uns ein tieferes Verständnis um die Möglichkeiten aber auch um die Einschränkungen von simulierten Ganzfahrzeugprüfungen auf verschiedenen technischen Ausführungen von Prüfständen. Eine qualitativ hochwertige und zeitlich optimierte Fahrzeug erprobung wird weiterhin angestrebt.“ “The investigations conducted in cooperation with Fraunhofer LBF in Darmstadt gave us an in-depth understanding of the capabilities and limitations inherent in simulated full-vehicle tests performed on a variety of test rig designs. High-quality, timely testing of vehicles continues to be our aim.”
Fraunhofer LBF Annual Report 2012 5 5