Parallel-in-time simulation of an electrical machine using MGRIT
Parallel-in-time simulation of an electrical machine using MGRIT
复制标题
使用 MGRIT 对电机进行并行实时仿真
DOI:
--
复制
发表时间:
2019
期刊:
影响因子:
--
通讯作者:
S. Schöps
中科院分区:
文献类型:
--
作者:
M. Bolten;S. Friedhoff;Jens Hahne;S. Schöps
We apply the multigrid-reduction-in-time (MGRIT) algorithm to an eddy current simulation of a two-dimensional induction machine supplied by a pulse-width-modulation signal. To resolve the fast-switching excitations, small time steps are needed, such that parallelization in time becomes highly relevant for reducing the simulation time. The MGRIT algorithm is an iterative method that allows calculating multiple time steps simultaneously by using a time-grid hierarchy. It is particularly well suited for introducing time parallelism in the simulation of electrical machines using existing application codes, as MGRIT is a non-intrusive approach that essentially uses the same time integrator as a traditional time-stepping algorithm. However, the key difficulty when using time-stepping routines of existing application codes for the MGRIT algorithm is that the cost of the time integrator on coarse time grids must be less expensive than on the fine grid to allow for speedup over sequential time stepping on the fine grid. To overcome this difficulty, we consider reducing the costs of the coarse-level problems by adding spatial coarsening. We investigate effects of spatial coarsening on MGRIT convergence when applied to two numerical models of an induction machine, one with linear material laws and a full nonlinear model. Parallel results demonstrate significant speedup in the simulation time compared to sequential time stepping, even for moderate numbers of processors.
DOI:
10.1137/18m1175653
发表时间:
2018-03
期刊:
SIAM J. Sci. Comput.
影响因子:
--
作者:
M. Gander;Iryna Kulchytska-Ruchka;I. Niyonzima;S. Schöps
通讯作者:
M. Gander;Iryna Kulchytska-Ruchka;I. Niyonzima;S. Schöps
影响因子:
2.1
作者:
S. Schöps;I. Niyonzima;M. Clemens
通讯作者:
M. Clemens
影响因子:
2.8
作者:
Bartel;Baumanns;Schöps
通讯作者:
Schöps