Test stand assembly including connecting shaft having adaptor flange with selected mass and moment of inertia

A test stand assembly comprising:

• a test object,
• an electric machine for driving and/or loading the test object,
• a connecting shaft having an adapter flange connected between the test object and the electric machine, and
• a feedback control arrangement for the electric machine for driving and/or loading the test object,
• wherein the assembly consisting of connecting shaft and electric machine has a constant, predetermined moment of inertia, and a mass and moment of inertia of the adapter flange is selected in such a manner that resonant frequency of the assembly consisting of test object, adapter flange, connecting shaft, and electric machine lies between an idle frequency of the test object and a partial load frequency within an operating range of the test object.