#### Jun.-Prof. Dr. Sebastian Peitz

Data Science for Engineering

Section Owner - Junior Professor - Data Science for Engineering

33100 Paderborn

- 1. Research topics
- Multiobjective optimization and optimal control
- Acceleration of algorithms by structure exploitation
- Applications in the area of machine learning (e.g., sparse regression & neural network training)
- Real-time applicability in combination with model predictive control
- Solution of PDE constrained problems using model order reduction

- Model reduction of complex systems, in particular PDEs, using
- Proper Orthogonal Decomposition (POD)
- Koopman Operator-based approaches
- Machine Learning

- Control of complex systems, in particular fluid flows

- Optimization methods for efficiency increasements of machine learning algorithms

- Multiobjective optimization and optimal control
- 2. Research projects
**Title:**Multiobjective Optimization of Non-Smooth PDE-Constrained Problems - Switches, State Constraints and Model Order Reduction**Description:**Joint project with the University of Konstanz (Prof. Dr. Stefan Volkwein), where we address multiobjective optimization and optimal control problems with non-smooth PDE constraints. In order to increase the numerical efficiency, model order reduction techniques such as Proper Orthogonal Decomposition (POD) are used, and we develop error bounds to obtain convergent algorithms.**Project Funding:**DFG Priority Programme 1962 "Non-Smooth and Complementarity-Based Distributed Parameter Systems: Simulation and Hierarchical Optimization"

**Title:**Simultaneous Development and Testing of Cyber Physical Systems (CPS) using the example of autonomous electric vehicles (SET CPS)**Description:**Joint project with dSPACE and e.GO, where we join the development and testing process of autonomous electric vehicles using multiobjective optimization in order to significantly accelerate the development of new cars (Further information (in german))**Project Funding:**EFRE.NRW

- 3. Talks and Presentations
**15th Viennese Conference on Optimal Control and Dynamic Games**

06.07. - 09.07.2021, Vienna, Austria.

"On the universal transformation of data-driven models to control systems"**SIAM Conference on Control and Its Applications**

19.07. - 21.07.2021, Spokane, WA, USA.

"On the universal transformation of data-driven models to control systems"**SIAM Conference on Applications of Dynamical Systems**

23.05. - 27.05.2021, virtual conference.

"On the universal transformation of data-driven models to control systems"**University of Rostock Seminar talk**

24.06.2020 - University of Rostock, Germany

"Data driven feedback control of nonlinear PDEs using POD and the Koopman operator"**Workshop on Optimal Control**

02.12. - 03.12.2019 - University of Konstanz, Germany

"The Koopman Operator in PDE-Constrained Optimal Control"**103rd Meeting of the GOR Working Group "Real World Optimization" on "Multicriteria Optimization and Decision Support in Industry"**

21.11. - 22.11.2019 - Fraunhofer ITWM, Kaiserslautern, Germany

"Autonomous driving with multiobjective model predictive control"**6th International Conference on Continuous Optimization**

05.08. - 08.08.2019 - Berlin, Germany

"Feedback control of nonlinear PDEs using Koopman-Operator-based switched systems"**SIAM Conference on Applications of Dynamical Systems**

19.05. - 23.05.2019 - Snowbird, Utah, USA

"Data Driven Feedback Control of Nonlinear PDEs Using the Koopman Operator"**SIAM Conference on Computational Science and Engineering**

25.02. - 01.03.2019 - Spokane, WA, USA

"Feedback Control of Nonlinear PDEs using Data-efficient Reduced Order Models Based on the Koopman Operator"**Symposium On Machine Learning for Dynamical Systems**

11.02. - 13.02.2019 - London, UK

"Low-dimensional data-based surrogate models for analysis, simulation and control of high-dimensional dynamical systems"**Forschungsseminar der Fachgruppe CSC, Max-Planck-Institut für Dynamik Komplexer Technischer Systeme**

20.11.2018 - Magedburg, Germany

"Data driven feedback control of nonlinear PDEs using the Koopman operator"**5th European Conference on Computational Optimization (EUCCO) 2018**

10.09. - 12.09.2018 - Trier, Germany

"Data driven feedback control of nonlinear PDEs using the Koopman operator"**NUMDIFF-15**

03.09. - 07.09.2018 - Halle (Saale), Germany

"Data driven feedback control of nonlinear PDEs using the Koopman operator"**Oxford Universitxy - Control Engineering Group Seminar**

14.05.2018 - Oxford, UK

"Data driven feedback control of nonlinear PDEs using the Koopman operator"**89th Annual Meeting of GAMM**

19.03. - 23.03.2018 - Munich, Germany

"Set-Oriented Multiobjective Optimal Control of PDEs using Certified ROMs"**4th CRITICS Workshop and Winter School on “Critical Transitions in Complex Systems: Mathematical theory and applications”**

12.03. - 16.03.2018, Wöltingerode, Germany**"**Controlling the Navier-Stokes equations using low-dimensional bilinear approximations obtained from data"**Center for Industrial Mathematics - University of Bremen**

14.12.2017, Bremen, Germany

"Exploiting structure in multiobjective optimal control for real-time applicability and PDE constraints"**it's OWL Strategietagung**

06.12.2017, Paderborn, Germany

"Mathematik in der Industrie - von der Mehrzieloptimierung zu intelligenten Systemen"**18th French - German - Italian Conference on Optimization**

25.09. - 28.09.2017 - Paderborn, Germany

"Multiobjective optimization with uncertainties and the application to reduced order models for PDEs"**8th International Workshop on Set Oriented Numerics (SON)**

12.09. - 15.09.2017 - Santa Barbara, California, USA

"A new framework for Koopman operator based open and closed loop control"**IFAC 2017 World Congress**

19.07. - 24.07.2017 - Toulouse, France

"A Multiobjective MPC Approach for Autonomously Driven Electric Vehicle"**SIAM Conference on Applications of Dynamical Systems**

21.05. - 25.05.2017 - Snowbird, Utah, USA

"A Multiobjective MPC Approach for Autonomously Driven Electric Vehicles"**88th Annual Meeting of GAMM**

06.03. - 10.03.2017 - Weimar, Germany

"POD-based Set Oriented Multiobjective Optimal Control"**Workshop on Optimal and Feedback Control of Differential Equations**

21.11. - 23.11.2016 - Konstanz, Germany

"Multiobjective Optimal Control of the Navier-Stokes Equations Using Reduced Order Modeling"**KoMSO Challenge Workshop "Reduced-Order Modeling for Simulation and Optimization"**

07.11. - 08.11.2016 - Robert BOSCH Campus, Renningen, Germany

"ROM-based Multiobjective Optimal Control of the Navier-Stokes Equations"**4th European Conference on Computational Optimization**

12.09. - 14.09.2016 - Leuven, Belgium

"Reduced Order Model Based Multiobjective Optimal Control of Nonlinear PDEs"**24th International Congress of Theoretical and Applied Mechanics**

21.08. - 26.08.2016 - Montreal, Canada

"Reduced Order Model based Multiobjective Optimal Control of Fluids"**11th AIMS Conference on Dynamical Systems, Differential Equations****and Applications**

01.07. - 05.07.2016 - Orlando, Florida, USA

"Multiobjective Optimal Control of Coherent Structures Using Reduced Order Modeling"**Paderborner Wissenschaftstage**

27.06.2016, Paderborn, Germany

"Energieeffizientes autonomes Fahren mit Hilfe mathematischer Optimierungsverfahren"**SON2015 - 6th International Workshop on Set-Oriented Numerics**

28.09. - 01.10.2015, London, England

"Multiobjective Optimal Control Methods for Fluid Flow Using Reduced Order Modeling"**SIAM Conference on Control & it's Applications**

08.07. - 10.07.2015, Paris, France

"Multiobjective Optimal Control Techniques in Energy Management" (within the Minisymposium "Controls, Optimization and Estimation for Building Energy Managment")**GAMM 86th Annual Meeting**

23.03. - 27.03.2015, Lecce, Italy

"Multiobjective Optimization of the Flow Around a Cylinder Using Model Order Reduction"**Oberwolfach Seminar: Projection Based Model Reduction**

23.09. - 29.09.2014, Oberwolfach, Germany**SON2014 - 5th International Workshop on Set-Oriented Numerics**

01.09. - 05.09.2014, Christchurch, New Zealand

"Multiobjective Optimal Control Methods for the Development of an Intelligent Cruise Control"**SysInt2014 - Conference on System-Integrated Intelligence**

02.07. - 04.07.2014, Bremen, Germany

"Development of an Intelligent Cruise Control using Optimal Control Methods"**ECMI2014 - European Consortium for Mathematics in Industry**

09.06. - 13.06.2014, Taormina, Italy

"Multiobjective Optimal Control Methods for the Development of an Intelligent Cruise Control"**6th Elgersburg School on Hybrid Dynamical Systems and Mathematical Biology**

16.03. - 22.03.2014, Elgersbrug, Germany- 4. Conferences and Minisymposia
Co-organization of a conference in honor of M. Dellnitz' 60th birthday, Paderborn, 27.09. - 01.10.2021

Organization of the Minisymposium "Recent trends in multiobjective optimization" at the SIAM Conference on Optimization, Spokane, WA, USA, 2021.

Co-organization (with J. Heiland) of the Minisymposium "Data-driven Methods in Model Reduction and Control" at the SIAM Conference on Control and Its Applications, Spokane, WA, USA, 2021.

Co-organization (with S. Klus and F. Nüske) of the Minisymposium "Data-driven methods for stochastic systems" at the SIAM Conference on Applications of Dynamical Systems, online conference, 2021.

Co-organization (with H. Lange) of the Minisymposium "Data-driven identification, modeling and control of complex dynamical systems" at the SIAM Conference on Mathematics of Data Science, Cincinnati, Ohio, USA, 2020 (canceled).

Co-organization (with S. Klus, M. Korda and A. Mauroy) of the Minisymposia "Control Techniques based on Koopman Operator Theory" and "Advanced Data-Driven Techniques and Numerical Methods in Koopman Operator Theory" at the SIAM Conference on Applications of Dynamical Systems, Snowbird, Utah, USA, 2019.

- 5. Additional Information

01.04.2021 - today | Assistant Professor (Jun.-Prof.) Data Science for Engineering, Department of Computer Science, Paderborn University |

01.10.2017 - 31.03.2021 | Managing Director Institute for Industrial Mathematics, Paderborn University |

01.10.2013 - 30.09.2017 | Scientific Employee Chair of Applied Mathematics and Institute for Industrial Mathematics (Prof. Dr. Michael Dellnitz, Paderborn University) |

08.08.2017 | PhD Title: "Exploiting Structure in Multiobjective Optimization and Optimal Control" |

01.10.2007 - 18.07.2013 | Studies Mechanical Engineering (RWTH Aachen) |

16.06.2006 | Abitur Hans-Ehrenberg-Gymnasium (Sennestadt) |

Open list in Research Information System

## 2021

M. Dellnitz, E. Hüllermeier, M. Lücke, S. Ober-Blöbaum, C. Offen, S. Peitz, K. Pfannschmidt, in: arXiv:2104.03562, 2021

S. Peitz, K. Bieker, in: arXiv:2102.04722, 2021

B. Gebken, S. Peitz, Journal of Optimization Theory and Applications (2021), 188, pp. 696-723

S. Ober-Blöbaum, S. Peitz, International Journal of Robust and Nonlinear Control (2021), 31(2), pp. 380-403

M.B. Berkemeier, S. Peitz, Mathematical and Computational Applications (2021), 26(2)

## 2020

S. Klus, F. Nüske, S. Peitz, J. Niemann, C. Clementi, C. Schütte, Physica D: Nonlinear Phenomena (2020), 406

K. Bieker, S. Peitz, S.L. Brunton, J.N. Kutz, M. Dellnitz, Theoretical and Computational Fluid Dynamics (2020), 34, pp. 577–591

B. Gebken, S. Peitz, Journal of Global Optimization (2020)

O. Schütze, O. Cuate, A. Martín, S. Peitz, M. Dellnitz, Engineering Optimization (2020), 52(5), pp. 832-855

S. Peitz, S. Klus, in: Lecture Notes in Control and Information Sciences, Springer, 2020, pp. 257-282

S. Peitz, S.E. Otto, C.W. Rowley, SIAM Journal on Applied Dynamical Systems (2020), 19(3), pp. 2162-2193

K. Flaßkamp, S. Ober-Blöbaum, S. Peitz, in: Advances in Dynamics, Optimization and Computation, Springer, 2020

C.I. Hernández Castellanos, S. Ober-Blöbaum, S. Peitz, International Journal of Robust and Nonlinear Control (2020), 30(17), pp. 7593-7618

K. Bieker, B. Gebken, S. Peitz, in: arXiv:2012.07483, 2020

## 2019

B. Gebken, S. Peitz, M. Dellnitz, Journal of Global Optimization (2019), 73(4), pp. 891-913

S. Banholzer, B. Gebken, M. Dellnitz, S. Peitz, S. Volkwein, in: arXiv:1906.09075, 2019

S. Hanke, S. Peitz, O. Wallscheid, J. Böcker, M. Dellnitz, in: 2019 IEEE International Symposium on Predictive Control of Electrical Drives and Power Electronics (PRECEDE), 2019

S. Peitz, S. Ober-Blöbaum, M. Dellnitz, Acta Applicandae Mathematicae (2019), 161(1), pp. 171–199

S. Peitz, S. Klus, Automatica (2019), 106, pp. 184-191

## 2018

S. Peitz, M. Dellnitz, Mathematical and Computational Applications (2018), 23(2)

D. Beermann, M. Dellnitz, S. Peitz, S. Volkwein, in: PAMM, 2018, pp. 51-54

S. Peitz, in: arXiv:1801.06419, 2018

S. Klus, S. Peitz, I. Schuster, in: arXiv:1805.10118, 2018

D. Beermann, M. Dellnitz, S. Peitz, S. Volkwein, in: Reduced-Order Modeling (ROM) for Simulation and Optimization, 2018, pp. 47-72

B. Gebken, S. Peitz, M. Dellnitz, in: Numerical and Evolutionary Optimization – NEO 2017, 2018

S. Klus, P. Gelß, S. Peitz, C. Schütte, Nonlinearity (2018), 31(7), pp. 3359-3380

## 2017

S. Peitz, K. Schäfer, S. Ober-Blöbaum, J. Eckstein, U. Köhler, M. Dellnitz, IFAC-PapersOnLine (2017), 50(1), pp. 8674-8679

S. Peitz, M. Dellnitz, in: NEO 2016, 2017, pp. 159-182

M. Dellnitz, J. Eckstein, K. Flaßkamp, P. Friedel, C. Horenkamp, U. Köhler, S. Ober-Blöbaum, S. Peitz, S. Tiemeyer, in: Progress in Industrial Mathematics at ECMI 2014 , Springer International Publishing, 2017, pp. 633-641

## 2016

J. Eckstein, S. Peitz, K. Schäfer, P. Friedel, U. Köhler, M.H. Molo, S. Ober-Blöbaum, M. Dellnitz, in: Procedia Technology, 2016, pp. 465-472

S. Peitz, M. Gräler, C. Henke, M.H. Molo, M. Dellnitz, A. Trächtler, in: Procedia Technology, 2016, pp. 483-490

## 2015

S. Peitz, M. Dellnitz, in: PAMM, 2015, pp. 613-614

## 2014

M. Dellnitz, J. Eckstein, K. Flaßkamp, P. Friedel, C. Horenkamp, U. Köhler, S. Ober-Blöbaum, S. Peitz, S. Tiemeyer, in: Procedia Technology, 2014, pp. 285-294