Automotive & motorsport
autonomous driving
different operating conditions, without the need to use the actual battery.
Taking The overall view For 100 per cent electrically powered vehicles – and even more so for autonomous driving – the focus is on the entire system comprising the main drive and all the vehicle’s auxiliary drives. Full-vehicle simulation is essential to optimise engine or motor control for different driving profiles, and to allow all the powertrain components to interact efficiently. Torque vectoring, for instance, is a technology that distributes the power from the electric drive to the wheels so that bends can be negotiated safely in all conceivable scenarios. Another key requirement – especially for autonomous driving – is redundancy of on- board systems: this, in turn, has a major impact on the operation and safety of the system as a whole. Trials on the test bench therefore create the conditions for boosting efficiency during development without the need for costly on-road testing. All these challenges make it essential
to continue developing appropriate measurement technologies. As regards test benches, Kistler collaborates with leading manufacturers across the globe to meet the prerequisites for safe and efficient electrical vehicles. Although these developments are still viewed with considerable skepticism in countries such as Germany, the Chinese market could well take on the role of a technology pioneer in the medium term, because policy-makers there have defined more specific requirements.
Instrumentation Monthly February 2019
Development work on drive systems for electromobility and high-efficiency engines calls for testing and measurement technology
if you do noT wanT To hear noise, you have To TesT Acoustic testing is an application that is attracting more attention in connection with electromobility: the perception threshold for noises and vibrations – especially in the vehicle’s interior – is far lower once the combustion engine is eliminated. However, this means that auxiliary drives such as servo motors become potential sources of disturbance for the vehicle occupants. For this purpose, Kistler integrates special NVH (Noise, Vibration, and Harshness) tests into its test benches. Based on piezo electric accelerometers, these tests make it
possible to optimise vehicle design in terms of vibration behaviour. Electric motor testing is another area where
developments are moving rapidly ahead: increased automation (i.e. direct integration of test benches into vehicle manufacture) is now the goal, in order to make auditing easier and guarantee that quality requirements are met. With this objective in view, Kistler is collaborating with leading automobile manufacturers to develop new technologies which currently include the software for end-of-line testing.
Kistler
www.kistler.com 45
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