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    EigenFit for Consistent Elastodynamic Simulation Across Mesh Resolution

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    Date
    2019
    Author
    Chen, Yu Ju (Edwin)
    Levin, David I. W.
    Kaufmann, Danny
    Ascher, Uri ORCID
    Pai, Dinesh K.
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    Abstract
    Elastodynamic system simulation is a key procedure in computer graphics and robotics applications. To enable these simulations, the governing differential system is discretized in space (employing FEM) and then in time. For many simulation-based applications keeping the spatial resolution of the computational mesh effectively coarse is crucial for securing acceptable computational efficiency. However, this can introduce numerical stiffening effects that impede visual accuracy. We propose and demonstrate, for both linear and nonlinear force models, a new method called EigenFit that improves the consistency and accuracy of the lower energy, primary deformation modes, as the spatial mesh resolution is coarsened. EigenFit applies a partial spectral decomposition, solving a generalized eigenvalue problem in the leading mode subspace and then replacing the first several eigenvalues of the coarse mesh by those of the fine one at rest. EigenFit's performance relies on a novel subspace model reduction technique which restricts the spectral decomposition to finding just a few of the leading eigenmodes. We demonstrate its efficacy on a number of objects with both homogenous and heterogenous material distributions.
    BibTeX
    @inproceedings {10.1145:3309486.3340248,
    booktitle = {Eurographics/ ACM SIGGRAPH Symposium on Computer Animation},
    editor = {Batty, Christopher and Huang, Jin},
    title = {{EigenFit for Consistent Elastodynamic Simulation Across Mesh Resolution}},
    author = {Chen, Yu Ju (Edwin) and Levin, David I. W. and Kaufmann, Danny and Ascher, Uri and Pai, Dinesh K.},
    year = {2019},
    publisher = {ACM},
    ISSN = {1727-5288},
    ISBN = {978-1-4503-6677-9},
    DOI = {10.1145/3309486.3340248}
    }
    URI
    https://doi.org/10.1145/3309486.3340248
    https://diglib.eg.org:443/handle/10.1145/3309486-3340248
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    Eurographics Association copyright © 2013 - 2022 
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    Theme by @mire NV
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