AFM experiments on vertical dynamics test rigs of AI-based control algorithms

Extensive experiments were conducted to characterize the vertical dynamics of AFM. In collaboration with partner KW Automotive GmbH, funded as part of the Kifahr project, the vehicle was equipped with a variety of sensors before being exposed to vertical excitation defined by a four-post test rig. This setup allows you to measure and analyze vehicle dynamics with predefined height profiles. The tests performed included harmonics and road-like excitation. The transfer function of characteristic vehicle states was estimated using sine wave excitation with increasing frequency. Chassis acceleration and wheel loads are very interesting as they can be used to quantify ride comfort and safety. Many different variables were recorded on the testbench to further support the modeling process. Not only is the acceleration of the wheels, chassis and engines interesting, but the deflection of the components also measured with a potentiometer. If the semi-active damper actuator current, four post position, velocity, acceleration, dynamic wheel load and additional auxiliary variables were added, then more than 50 signals had to be processed. Many measurement channels required recording on two different devices. For subsequent recording synchronization, specific signals were recorded on both devices, and then used to calculate delays to correct for different time bases of measurements.