Hybrid Modeling for Data-enhanced Multiobjective Optimization of Multibody Systems

Prof. Dr.-Ing. habil. Walter Sextro (Paderborn)
Jun.-Prof. Dr. Sebastian Peitz (Paderborn)

Multiobjective optimization of complex multibody systems

In almost all technical systems, we want to optimize several conflicting criteria simultaneously such as, the minimization of the energy consumption, the construction cost, or the system complexity. Instead of a single optimum, we thus need to calculate the Pareto front of optimal compromise solutions (cf. the Figure below).

  • Problem: Model-based multiobjective optimization is very expensive
  • Solution: Use efficient and accurate surrogate models

Hybrid modeling of multibody systems

  • White-box models (e.g. differential equations) with a high degree of physical knowledge are often too complex and/or too inaccurate
  • Black-box models (generated e.g. by machine learning methods such as decision trees or neural networks) are often not explainable and cost-intensive (data collection)

Hybrid modeling as a combination of physics-based white-box models and data-driven black-box models, e.g. in the form of a discrepancy model

The hybrid, data-enhanced multiobjective optimization framework

Contacts

 

Prof. Dr.-Ing. habil. Walter Sextro

Pohlweg 47-49, 33098 Paderborn, P1.3.31.1

 

Jun.-Prof. Dr. Sebastian Peitz

Pohlweg 51, 33098 Paderborn, O4.213

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