Scaling of Rotational Quantities for Simultaneous Testing of Powertrain Subsystems with Different Scaling on a X-in-the-Loop Test Bench

Abstract

X-in-the-loop (XiL) enables testing of a hardware prototype considering the remaining system by emulation of the system behavior to support early validation in the context of frontloading. To test a scaled prototype integrated in a remaining system, an adjustment of the rotational quantities between the prototype and remaining system is necessary. It is currently unclear, how scaling factors based on similarity methods adapt rotational quantities in a real-time XiL test bench for simultaneous testing.In this paper, scaling factors for the adaptation of rotational quantities between interconnected systems are derived and verified to enable scaled component testing considering the remaining system. This enables simultaneous testing of powertrain components with different scaling in real-time. With the example of a safety clutch, the rotational quantities are adapted. Using the derived scaling factors, the clutch torque could be recreated by using a scaled clutch. This opens up new possible applications for simultaneous testing of systems with different scaling.