CNCS Center for Nonlinear and Complex Systems
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Publications [#333685] of Lawrence N. Virgin

Papers Published

  1. Brzeski, P; Virgin, LN, System identification of energy dissipation in a mechanical model undergoing high velocities: An indirect use of perpetual points, Mechanical Systems and Signal Processing, vol. 108 (August, 2018), pp. 115-125, Elsevier BV [doi]
    (last updated on 2019/09/19)

    © 2018 Elsevier Ltd Energy dissipation is often the most challenging component of system identification in the modeling of dynamical behavior in mechanical systems. Even for a relatively simple single-degree-of-freedom system such as the rigid-arm pendulum, it can be difficult to choose the form of the best damping model, as well as the subsequent challenge of estimating the appropriate parameters, especially for a model that accurately captures the nature of energy dissipation over a wide range of operational conditions. This paper specifically focuses on a mechanical system in which subtle changes can be made to the system with a view to isolating and modeling energy dissipation. The approach described in this paper was developed as a by-product of experimentally investigating perpetual points. It is shown that certain features of high-velocity, spinning motion lends itself to greater fidelity in the data-fitting process and thus added confidence in choosing the most accurate energy dissipation model with the most appropriate parameters.