A Two-Port Network for a Ball-Screw Inerter Employing Nonlinearities

We propose a two-port representation of the inerter and conduct experiments for verification. Considering the mechanical components and the interactions, the model can successfully forecast the inerter responses during experiments, increasing the fitting accuracy from 49% to 75%. The results show that the two-port network can effectively forecast systems' responses employing the inerter.