Mechatronic systems are one of the biggest drivers of innovation in automotive engineering. During the last decades, various mechatronic systems in the field of powertrain, chassis or car body have been successfully introduced in series vehicles. In the early development phase of such mechatronic systems, hardware-in-the-loop is a well-established method.
To this time point, different control units are tested in component test bench individually. The following development phase and accordingly the calibration work are mainly performed with the vehicle in test terrain or on road.
Nowadays, with the constant development of advanced driver assistance systems, the focus on autonomous driving and the stricter regulation on vehicle emission, the complexity of mechatronic systems in vehicle is increasing significantly. At the same time, the automobile industry sees a demand for more vehicle model variety and a shorter vehicle development time. In this respect, it is necessary to establish a model-based development process and front-loading the development work from vehicle to earlier development phases. Since tests with the vehicle in test terrain are expensive and effort for correction is extremely high. To close the gap between the component tests and tests with the vehicle in test terrain, one needs test bench that allows the testing of function and interaction of various mechatronic systems in longitudinal, lateral and vertical freedom degrees on complete vehicle level under realistic driving situations. This is the main motivation to develop the so-called Car-in-the-Loop concept.
The current state of development is described in the following videos: