The growing electrification of vehicles – and therefore the absence of the internal combustion engine (ICE) – makes the EPS becomes more apparent as a noise source in the interior of the vehicle. With the product fleet expanding rapidly, the number of ‘EPS vehicle’- combinations increases too, such that it becomes impossible to test all combinations on the road.
Rather than testing each combination in the vehicle, VIBES introduced Substructuring Technology, enabling to test each EPS system separately on a test bench and simulate the in-vehicle NVH performance using accurate noise transfer functions (NTFs) of different vehicle models. This separation is enabled by the Virtual Point Transformation. The Virtual Point provides the common interface between the test bench and the vehicle chassis connection points.