Iryna Kulchytska-Ruchka M.Sc.

Working area(s)

Multi-rate time-integration combined with domain decomposition of electric-machine simulation

Contact

work +49 6151 16-24379
fax +49 6151 16-24027

Work S2|17 38
Schloßgartenstr. 8
64289 Darmstadt

As a result of the German energy transition ("Energiewende"), efficient and robust designs of electromechanical energy converters, in particular electrical machines, are becoming increasingly important, whether as drives or components in the automotive industry, in industrial automation or in household appliances. Research about this topic is part of the BMBF PASIROM project and deals with modeling, simulation and robust optimization of electrical machines. Particularly the efficient time-parallel simulation of the models, e.g. using the Parareal approach, is investigated. Parallelization in the time domain is of a particular interest especially in the cases when electric motors are supplied with a pulse-width modulated voltage of a high frequency, e.g., of a couple of tens of kHz. This leads to problems which involve discontinuous right-hand sides and requires special techniques for their numerical solution. A novel Parareal algorithm, based on a reduction of the coarse dynamics by using a smooth low-frequency excitation, has been recently introduced. Its convergence analysis and application to an induction machine model shows efficiency of the approach for the real-life demands in electrical engineering.

Best Oral Presentation Award presented to Iryna Kulchytska for her talk “A New Parareal Algorithm for Problems with Discontinuous Sources” at the 7th Workshop on Parallel-in-Time methods (PinT 2018)

2020

Pels, Andreas ; Kulchytska-Ruchka, Iryna ; Schöps, Sebastian (2020):
Parallel-in-Time Simulation of Power Converters Using Multirate PDEs.
In: 13th Conference on Scientific Computing in Electrical Engineering (SCEE 2020), Eindhoven. URL: https://www.scee-conferences.org/. [Talk]

Kulchytska-Ruchka, Iryna ; Pels, Andreas ; Schöps, Sebastian (2020):
Parallel-in-Time Simulation of Power Converters Using Multirate PDEs.
In: Workshop on Advances in Electromagnetic Research – KWT 2020. URL: http://maxwell-in-motion.org. [Talk]

Kulchytska-Ruchka, Iryna ; Schöps, Sebastian (2020):
Towards a Parallel-in-Time Calculation of Time-Periodic Solutions with Unknown Period.
In: Scientific Computing in Electrical Engineering SCEE 2020, Mathematics in Industry. Springer. ARXIV: 2004.01612, forthcoming. [In Proceedings]

Kulchytska-Ruchka, Iryna ; Schöps, Sebastian (2020):
Towards a Parallel-in-Time Calculation of Time-Periodic Solutions with Unknown Period.
In: 13th Conference on Scientific Computing in Electrical Engineering (SCEE 2020), Eindhoven. URL: https://www.scee-conferences.org/. [Poster]

Kulchytska-Ruchka, Iryna ; Schöps, Sebastian ; Hinze, Michael. PASIROM: Parallel Simulation and Robust Optimization of Electro-Mechanical Energy Converters. In Success Stories on Mathematics in Industry. Springer, 2020. [In Collection]

De Gersem, Herbert ; Kulchytska-Ruchka, Iryna ; Schöps, Sebastian (2020):
Finite-Element Simulation of an Accelerator Magnet: an Exercise.
In: CAS - CERN Accelerator School: Numerical Methods for Analysis, Design and Modelling of Particle Accelerators, 11-23 November 2018, Thessaloniki, Greece, 202–225. URL: https://cas.web.cern.ch/previous-schools, ARXIV: 2006.10463. [In Proceedings]

Cortes Garcia, Idoia ; Kulchytska-Ruchka, Iryna ; Schöps, Sebastian (2020):
Efficient Simulation of Field/Circuit Coupled Systems with Parallelised Waveform Relaxation.
In: IEEE Transactions on Magnetics, 56, (2), pp. 1–4, ISSN: 0018-9464, DOI: 10.1109/TMAG.2019.2952695, ARXIV: 1909.08895. [Article]

Bast, Denys ; Kulchytska-Ruchka, Iryna ; Schöps, Sebastian ; Rain, Oliver (2020):
Parallel-in-Time Simulation of Induction Machines in an Industrial Environment.
In: 13th Conference on Scientific Computing in Electrical Engineering (SCEE 2020), Eindhoven. URL: https://www.scee-conferences.org/. [Talk]

Bast, Denys ; Kulchytska-Ruchka, Iryna ; Schöps, Sebastian ; Rain, Oliver (2020):
Accelerated Steady-State Torque Computation for Induction Machines using Parallel-In-Time Algorithms.
In: IEEE Transactions on Magnetics, 56, (2), pp. 1–9, ISSN: 0018-9464, DOI: 10.1109/TMAG.2019.2945510, ARXIV: 1902.08277. [Article]

2019

Kulchytska-Ruchka, Iryna ; De Gersem, Herbert ; Schöps, Sebastian (2019):
Periodic Parareal with multi-harmonic coarse grid correction.
In: VIII Workshop on Parallel in Time Methods PinT 2019, Bielefeld, Germany. URL: https://parallel-in-time.org/events/8th-pint-workshop/. [Talk]

Kulchytska-Ruchka, Iryna ; Schöps, Sebastian (2019):
Accelerated Steady-State Solution of the Eddy Current Problem via Parallelization in Time Domain.
In: Workshop on Advances in Electromagnetic Research – KWT 2019, Rietzlern, Austria. URL: http://maxwell-in-motion.org. [Poster]

Kulchytska-Ruchka, Iryna ; De Gersem, Herbert ; Schöps, Sebastian (2019):
An efficient steady-state analysis of the eddy current problem using a parallel-in-time algorithm.
In: The Tenth International Conference on Computational Electromagnetics (CEM 2019), Edinburgh, UK. URL: https://events.theiet.org/cem/. [Poster]

Kulchytska-Ruchka, Iryna ; Cortes Garcia, Idoia ; De Gersem, Herbert ; Schöps, Sebastian (2019):
Parallel Methods for Coupled Differential Algebraic Equations.
In: 9th Descriptor Workshop 2019, Paderborn. URL: https://www.mpi-magdeburg.mpg.de/de/descriptor2019. [Talk]

Kulchytska-Ruchka, Iryna ; De Gersem, Herbert ; Schöps, Sebastian (2019):
An efficient steady-state analysis of the eddy current problem using a parallel-in-time algorithm.
In: The Tenth International Conference on Computational Electromagnetics (CEM 2019). ISBN: 978-1-83953-066-1, DOI: 10.1049/cp.2019.0113, ARXIV: 1905.13076. [In Proceedings]

Kulchytska-Ruchka, Iryna ; Cortes Garcia, Idoia ; Schöps, Sebastian (2019):
Multirate Parareal with Application in Electrical Engineering.
In: SIAM Conference on Computational Science and Engineering (CSE) 2019, Spokane, Washington, USA. URL: https://www.siam.org/conferences/CM/Main/cse19. [Talk]

Gander, Martin J. ; Kulchytska-Ruchka, Iryna ; Schöps, Sebastian. Haynes, Ronald ; MacLachlan, Scott ; Cai, Xiao-Chuan ; Halpern, Laurence ; Kim, Hyea Hyun ; Klawonn, Axel ; Widlund, Olof (editors) (2019):
A New Parareal Algorithm for Time-Periodic Problems with Discontinuous Inputs.
In: Domain Decomposition Methods in Science and Engineering XXV, volume 138 of Lecture Notes in Computational Science and Engineering. Springer. ISBN: 978-3-030-56749-1, ARXIV: 1810.12372. [In Proceedings]

Gander, Martin J. ; Kulchytska-Ruchka, Iryna ; Niyonzima, Innocent ; Schöps, Sebastian (2019):
A New Parareal Algorithm for Problems with Discontinuous Sources.
In: SIAM Journal on Scientific Computing, 41, (2), pp. B375–B395, ISSN: 1064-8275, DOI: 10.1137/18M1175653, ARXIV: 1803.05503. [Article]

Friedhoff, Stephanie ; Hahne, Jens ; Kulchytska-Ruchka, Iryna ; Schöps, Sebastian (2019):
Exploring Parallel-in-Time Approaches for Eddy Current Problems.
In: Progress in Industrial Mathematics at ECMI 2018, volume 30 of The European Consortium for Mathematics in Industry, 373–379. Springer. ISBN: 9783030275495, DOI: 10.1007/978-3-030-27550-1_47, ARXIV: 1810.13263. [In Proceedings]

Cortes Garcia, Idoia ; Kulchytska-Ruchka, Iryna ; Schöps, Sebastian (2019):
Efficient Simulation of Field/Circuit Coupled Systems with Parallelised Waveform Relaxation.
In: 22nd Conference on the Computation of Electromagnetic Fields (COMPUMAG 2019), Paris, France. International Compumag Society. URL: http://compumag2019.com. [Poster]

Cortes Garcia, Idoia ; Kulchytska-Ruchka, Iryna ; Schöps, Sebastian (2019):
Parallel-in-time methods for field/circuit coupled differential algebraic equations.
In: International Conference on Scientific Computation and Differential Equations (SciCADE) 2019, Innsbruck, Austria. URL: https://scicade2019.uibk.ac.at. [Talk]

2018

Kulchytska-Ruchka, Iryna ; Merkel, Melina ; Schöps, Sebastian (2018):
Parallel-In-Time Methods for the Computation of Electromagnetic Fields.
In: Mathematisches Kolloquium der Bergischen Universität Wuppertal, Wuppertal. [Talk]

Kulchytska-Ruchka, Iryna ; Schöps, Sebastian (2018):
Parallel-in-time Simulation of Electric Machines, Excited with PWM-Signal.
In: Workshop on Advances in Electromagnetic Research – KWT 2018, Rietzlern, Austria. URL: http://maxwell-in-motion.org. [Poster]

Kulchytska-Ruchka, Iryna ; Schöps, Sebastian ; Gander, Martin J. ; Niyonzima, Innocent (2018):
Parallel-in-time solution of the time-periodic eddy current problem with discontinuous excitation.
In: International Conference on Domain Decomposition Methods DD25, St. John's, Canada. URL: https://dd25.math.mun.ca. [Talk]

Kulchytska-Ruchka, Iryna ; Schöps, Sebastian ; Gander, Martin J. ; Niyonzima, Innocent (2018):
Convergence analysis of Parareal for systems with discontinuous inputs.
In: 20th European Conference on Mathematics for Industry (ECMI 2018), Budapest, Hungary. URL: http://ecmi.bolyai.hu. [Talk]

Kulchytska-Ruchka, Iryna ; Gander, Martin J. ; Schöps, Sebastian ; Niyonzima, Innocent (2018):
A New Parareal Algorithm for Problems with Discontinuous Sources.
In: VII Workshop on Parallel in Time Methods PinT 2018, Roscoff, France. URL: http://www.math.univ-paris13.fr/~japhet/PINT/PINT2018_schedule.htm. [Talk]

Kulchytska-Ruchka, Iryna ; Schöps, Sebastian ; De Gersem, Herbert (2018):
A spectral coarse solver for the parallel-in-time solution of the eddy current problem.
In: SIAM Conference on Parallel Processing for Scientific Computing, Tokyo, Japan. URL: https://www.siam.org/meetings/pp18. [Talk]

Friedhoff, Stephanie ; Hahne, Jens ; Kulchytska-Ruchka, Iryna ; Schöps, Sebastian (2018):
Exploring Parallel-in-Time Approaches for Eddy Current Problems.
In: 20th European Conference on Mathematics for Industry (ECMI 2018), Budapest, Hungary. URL: http://ecmi.bolyai.hu. [Talk]

Cortes Garcia, Idoia ; Kulchytska-Ruchka, Iryna ; Schöps, Sebastian (2018):
Parallelised Waveform Relaxation for Field/Circuit Coupled Systems.
In: Numdiff-15, Halle. URL: https://sim.mathematik.uni-halle.de/numdiff/Numdiff15/. [Talk]

Cortes Garcia, Idoia ; De Gersem, Herbert ; Förster, Peter ; Kulchytska-Ruchka, Iryna ; Moskalew, Artem ; Quetscher, Frederik ; Schöps, Sebastian (2018):
Time parallelised Waveform Relaxation for Field/Circuit Coupled Systems.
In: 5th STEAM Collaboration Meeting, CERN, Geneva. URL: https://indico.cern.ch/event/731743/. [Talk]

2017

Kulchytska-Ruchka, Iryna ; Schöps, Sebastian ; De Gersem, Herbert (2017):
Time-parallel solution of the time-periodic eddy current problem.
In: 6th Workshop on Parallel-in-Time methods, Monte Verità, Switzerland. URL: https://www.ics.usi.ch/index.php/6th-workshop-on-parallel-in-time-methods. [Talk]

Kulchytska-Ruchka, Iryna ; De Gersem, Herbert ; Schöps, Sebastian (2017):
Time-parallel solution of the time-periodic eddy current problem.
In: 4th International Conference on Computational Engineering (ICCE 2017), Darmstadt, Germany. [Talk]

Kulchytska-Ruchka, Iryna ; Schöps, Sebastian ; De Gersem, Herbert (2017):
Time-parallel solution of the time-periodic eddy current problem.
In: Workshop on Advances in Electromagnetic Research – KWT 2017, Rietzlern, Austria. URL: http://maxwell-in-motion.org. [Talk]

Kulchytska-Ruchka, Iryna ; Schöps, Sebastian ; De Gersem, Herbert (2017):
Time-parallel solution of the time-periodic eddy current problem.
In: International Conference on Scientific Computation and Differential Equations (SciCADE 2017), Bath, United Kingdom. [Talk]

Kulchytska-Ruchka, Iryna (2017):
Acceleration of FEM Computations for Induction Machines. Universität Hamburg, Hamburg. [Master's Thesis]