F O C U S 1 9 by ‘automating’ the unit under test. So after a road measurement with M.O.V.E, it is possible to operate the vehicle on the chassis dynamometer in exactly the same map point in order to take advantage of the advanced analysis options offered by the testbed environment.” This methodology will be available for the chassis dynamometer automation system PUMA Open Vehicle Testing in 2016. Alongside the reproduction of test drives, RDE reference cycles play a major role in RDE development on the testbed too. Such cycles are very close to real-world vehicle use. According to the experts, these reference cycles that were either developed by the OEM, created in the context of studies or recorded using M.O.V.E can be employed on all of AVL’s test systems, including chassis dynamometers, powertrain or even engine test beds. A key part of these reference cycles, compared to the previous drive cycles (e.g. NEDC), is the fact that road and environmentrelated information is taken into account to make the simulation of the drive cycles in the respective testing environment as close to reality as possible. COMBINED DEVELOPMENT ENVIRONMENT: SIMULATION TESTBED If the vehicle is to be operated on a testbed within a virtual environment, AVL InMotion is put to use, which is a highly advanced, maneuver based simulation system. “A typical application case would be a powertrain including all of its control units mounted on the testbed,” explains Johannes F. Kregar. “We are provided with a huge portfolio of methodologies and simulation solutions. The high-end simulation system InMotion is capable of reproducing all kinds of road profiles – either generated synthetically or recorded using M.O.V.E iS – on the testbed, as well as a variety of maneuver based driving situations.” CONSISTENT AVL RDE DEVELOPMENT TOOL CHAIN Thanks to AVL’s state-of-the-art tool chain that includes measuring equipment, simulation and the most advanced test systems, it can be ensured that all mechanisms of an RDE road test are reproduced as realistically as possible on the testbed. The consistent AVL tool chain has the advantage of allowing the test run on the testbed to be evaluated in exactly the same way as the test drive is on the road. Roland Wanker sums up his thoughts on RDE development: “The key to success is to ensure efficient optimization across all development environments. Given the loss of unambiguous reproducibility and the extended requirements, RDE makes it necessary to adapt the development process. The key elements to focus on in this respect are increased model-based development on the virtual testbed, highly-automated, tool-aided test runs on the various testbeds and the industrialization of the ‘on-road test environment’ for the growing number of RDE test drives and type approval tests. For all of these areas, AVL offers highly advanced solutions and products that help our customers to master the challenges which RDE entails in the best possible way.” < > AVL M.O.V.E iS is a mobile emission measuring system, which is capable of measuring gaseous emission components (NO/NO2 and CO/CO2) as well as particle numbers.
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