Dr. Kai Schäfer

Research Areas

• Parameter identification for dynamical systems
• Optimization
• Bilevel optimization

Projects

1. TOPA³S - Transfer center for the optimized, Assisted, highly Automated and Autonomous Systems (01.06.2019 - 30.06.2021)

Courses (Selection)complete list

1. Übungen Einführung in die Optimierung und optimale Steuerung (Wintersemester 2020/2021)
2. Übungen Numerik 2 (Sommersemester 2020)

Theses (Selection)complete list

1. Dynamische Parameteridentifikation mittels simultaner Datenregression und Gradientenvergleich (Sally Schiewelbein)
2. Parameteridentifikation dynamischer System mittels eines Single-Shooting-Homotopieansatzes (Petr Shulpyakov)

Publications (Selection)complete list

1. K. Schäfer.
   Decomposition Methods for Parameter Identification and Bilevel Programming.
   Dissertationsschrift, Universität Bremen, 2023.

   DOI: 10.26092/elib/2735

2. I. Mykhailiuk, K. Schäfer, C. Büskens.
   Parametric stability score and its application in optimal control.
   IFAC-PapersOnLine, 55(16):172-177, Elsevier, 2022.

   DOI: 10.1016/j.ifacol.2022.09.019

3. M. Wiesner, K. Schäfer, W. Bergmann, A. Berger, P. Shulpyakov, C. Dittert, C. Büskens.
   Analyzing the Influence of Measurements in Dynamical Parameter Identification Using Parametric Sensitivities.
   Third IFAC Conference on Modelling, Identification and Control of Nonlinear Systems, 15.09-17.09.2021.
   

   DOI: 10.1016/j.ifacol.2021.10.320

4. I. Mykhailiuk, K. Schäfer, C. Büskens.
   Stability Score for Local Solutions of Unconstrained Parametric Nonlinear Programs.
   GAMM 92nd Annual Meeting of the International Association of Applied Mathematics and Mechanics , 15.08-18.08.2022.
   Proceedings in Applied Mathematics & Mechanics, 21(1), Wiley, 2021.

   DOI: 10.1002/pamm.202100215

5. K. Schäfer, J. Fliege, K. Flaßkamp, C. Büskens.
   Reformulating Bilevel Problems by SQP Embedding.
   GAMM 91st Annual Meeting of the international Association of Applied Mathematics and Mechanics, online, 15.03.2021 - 19.03.2021.
   Proceedings in Applied Mathematics & Mechanics, WILEY-VCH, 2021.

   DOI: 10.1002/pamm.202000302