News

Annual Convention for the DFG-Priority Program KOMMMA

The researchers of the "Kick and Catch"-Teams: Koustav Kanjilal (Freiburg), Arwed Schütz (Wilhelmshaven), Michael Olbrich (Augsburg), Mario Farny (Bochum) (from left to right)

Once a year, all 22 individual projects funded by the DFG priority program 2206 "KOMMMA" meet. This annual convention took place from 29.09. to 01.10. in Koblenz. In compliance with an appropriate hygiene concept, each individual project presented their progress. Thus, each research team received helpful feedback. Moreover, common challenges of different projects could be identified.

Regular Meeting with The Research Group from University of Rostock

From August 24 to 26, 2020, the regular meeting between the research group of Prof.Dr.-Ing Tamara Bechtold (Jade University of Applied Sciences) and Prof.Dr.-Ing Dennis Hohlfeld (University of Rostock) was held in Jade University of Applied Sciences. Doctural students from both research groups presented their recent research results and a fruitful discussion was held successfully. 

Presentations:

  • Simon Stindt: Bachelor Thesis Defence: "Simulation-based Evaluation of Broadband Harvesting Concepts in ANSYS"
  • Sofiane Bouhedma: "Towards a Tunable Dual-Frequency Vibration-based Energy Harvester"
  • Siyang Hu: "Topology Optimization using pyANSYS"
  • Gunasheela Sadashivaiah: "Novel Modelling and System-level Simulation Techniques for MEMS"
  • Arwed Schütz: "pMOR for Electromagnetic Analysis"
  • Yongchen Rao: "Design Optimization and Preliminary Fabrication of TEG"
  • Chengdong Yuan: "Parametric Model Order Reduction for Thermoelectric Generator"

In the end, Prof.Dr.-Ing Bechtold and Prof.Dr.-Ing Hohlfeld gave a summary of this meeting and presented the future projects.

 

   

(From left to right) Line 1: Sofiane Bouhedma, Gunasheela Sadashivaiah, Chengdong Yuan, Yongchen Rao; Line 2: Soenke Maeter, Arwed Schütz, Siyang Hu, Simon Stindt; Line 3: Prof.Dr.-Ing Tamara Bechtold, Prof.Dr.-Ing Dennis Hohlfeld

 

 

(From left to right) Prof.Dr.-Ing Dennis Hohlfeld, Soenke Maeter, Prof.Dr.-Ing Tamara Bechtold, Simon Stindt, Siyang Hu, Gunasheela Sadashivaiah, Chengdong Yuan, Sofiane Bouhedma, Yongchen Rao, Arwed Schütz

 

Arwed Schütz was arwarded the "Study Award 2020 of the VDE Region North-West"

On July 16, 2020, M. Sc. Arwed Schütz was arwarded the "Study Award 2020 of the VDE Region North-West" for his extraordinary performance in studying electrical engineering.

 

 

 

 

Papers have been accepted and presented in EuroSimE 2020 virtual event

Due to coronavirus pandemic, the EuroSimE 2020 was held online during July 06 - 08, 2020. In this event, four papers from our research group were accepted and presented:

 

Paper published in COMPEL-The International Journal for Computation and Mathematics in Electrical and Electronic Engineering

On May 07, 2020, our research paper "Stable Compact Modeling of Piezoelectric Energy Harvester Devices" was published in COMPEL-The International Journal for Computation and Mathematics in Electrical and Electronic Engineering, volume 39, issue 2.

 

Paper published in International Journal for Numerical Methods in Biomedical Engineering

On April 24, 2020, our research paper "Towards Efficient Design Optimization of a Miniaturized Thermoelectric Generator for Electrically Active Implants via Model Order Reduction and Submodeling Technique" was published in International Journal for Numerical Methods in Biomedical Engineering, volume 36, issue 4.

 

Regular Meeting with Prof. Dr. -Ing. Dennis Hohlfeld at University of Rostock

During Feburary 05 to 07, 2020, the regular meeting between the research group of Prof.Dr.-Ing Tamara Bechtold (Jade University of Applied Sciences) and Prof.Dr.-Ing Dennis Hohlfeld (University of Rostock) was held in University of Rostock. Doctural students from both research groups presented their recent research results and a fruitful discussion was held successfully.

 

   

Mr. Bouhedma was introducing the measurement devices for piezoelectric energy harvester to Mr. Schütz and Mr. Hu.

 

Porf.Dr.-Ing D. Hohlfeld, S. Bouhedma, G. Sadashivaiah, Y.C. Rao (Group in Rostock), C.D. Yuan, S.Y. Hu, Porf.Dr.-Ing T. Bechtold, A. Schütz (Group in Wilhelmshaven)

 

Research communication at University of Augsburg

At the beginning of January, Mr. Arwed Schütz visited the project partners from the Chair of Control Engineering at the University of Augsburg as a doctoral student in the "Kick and Catch" project. During the first two days, the whole team worked together successfully. For Prof. Dr.-Ing. Bechtold as well as Siyang Hu and Chengdong Yuan, the trip continued on Tuesday to Prof. Dr.-Ing. Boris Lohmann from the Technical University of Munich.

From January 13th to 24th, Michael Olbrich and Arwed Schütz were able to create a very first model of the catch actuator and to implement it in a first control system. This is the first step towards making this new type of microactuator a reality.

 

Prof. Dr.-Ing. Christoph Ament, Michael Olbrich, Arwed Schütz, Chengdong Yuan, Siyang Hu, Prof. Dr.-Ing. Bechtold

 

New memeber joined our research group!

Since Janurary, 2020, M. Sc. Arwed Schütz pursues a Phd within the DFG-funded research project "Kick and Catch - cooperative microactuators for freely moving platforms" at the Jade University of Applied Sciences in cooperation with the University of Augsburg.

 

 

 

 

 

Science Camp 2019 at University of Rostock

On November 22, 2019, Jade2Pro Ph.D. students, Chengdong Yuan and Siyang Hu, presented their posters in Science Camp 2019 at University of Rostock.

  • Siyang Hu, Arwed Schütz, Dennis Hohlfeld, Tamara Bechtold, 'Design Optimization of Multi-Resonat Piezoelectric Energy Harvester'.
  • Chengdong Yuan, Stefanie Kreß, Gunasheela Sadashivaiahm,  Dennis Hohlfeld, Tamara Bechtold. 'Towards Efficient Design Optimization of Thermoelectric Generator via Model Order Reduction and Submodeling Technique'.

Chengdong Yuan and Gunasheela Sadashivaiah

 

Presentation given by industrial dotorate at Bosch

On November 04, 2019, Mrs. Nabholz Ulrike, who is supervised by Prof. Mehner at Chemnitz University of Technology, gave a presentation about her industial Ph.D. project on nonlinearities in MEMS at Bosch. Prof. Dr. -Ing. Tamara Bechtold in Jade University of Applied Sciences, Prof. Dr. -Ing Dennis Hohlfeld in University of Rostock, and all their research group members attended the presentation.

 

Yongchen Rao, Sofiane Bouhedma, Chengdong Yuan, Prof. Dr. -Ing. Tamara Bechtold, Nabholz Ulrike, Prof. Dr. -Ing. Dennis Hohlfeld, Arwed Schütz, Siyang Hu

 

M.Sc. Yongchen Rao was granted a scholarship by the Jade2Pro-program

Since November 1, 2019, M. Sc. Yongchen Rao has been granted a scholarship by the Ph.D. project (Jade2Pro-program) for the research project 'Fabrication strategies for high efficiency thermoelectric generators for electrically active implants' involving Jade University of Applied Sciences and the University of Rostock.

 

 

 

 

 

 

Paper has been accepted by MicroSystemTechnik Kongress 2019

Jade2Pro Ph.D. student Chengdong Yuan's Paper 'A Combination of POD-based Model Order Reduction and Thermal Submodeling for Miniaturized Thermoelectric Generator' has been accepted and presented as a poster in MicroSystemTechnik Kongress 2019, Berlin. A meeting with the research group from Univerisity of Rostock was held in MST Kongress.

 

    

Chengdong Yuan and Prof. Dr. -Ing. Tamara Bechtold; Sofiane Bouhedma, Chengdong Yuan, Ph.D. Ekaterina Sergeeva, Prof. Dr. -Ing. Dennis Hohlfeld

 

DFG Kick-off Meeting in KIT

 

        

        

 

Regular Meeting with Prof. Dr. -Ing. Dennis Hohlfeld at University of Rostock

On August 16, 2019, the regular meeting between the research group of Prof.Dr.-Ing Tamara Bechtold (Jade University of Applied Sciences) and Prof.Dr.-Ing Dennis Hohlfeld (University of Rostock) was held in University of Rostock. Students from Jade University of Applied Scinces joined the Laboratory tour in University of Rostock.

 

  

Laboratory tour in University of Rostock, Institute of Electronic Appliances and Circuits

 

A. Schütz, S.Y. Hu, S. Bouhedma, G. Sadashivaiah, Porf.Dr.-Ing T. Bechtold, Porf.Dr.-Ing D. Hohlfeld, C.D. Yuan

 

Paper has been accepted by 33rd International ECMS Conference

From June 11 to June 14, 2019, Jade2Pro Ph. D. student Chengdong Yuan attended the 33rd International ECMS Conference on Modelling and Simulation in Caserta, Italy. He published the paper 'Efficient Design Optimization of a Thermoelectric Generator by a Combination of Model Order Reduction and Thermal Submodeling Techniques' and gave the presentation in the conference.

 

Chengdong Yuan

 

Paper has been accepted by World Congress of Structural and Multidisciplinary Optimization

From May 20 to May 24 , 2019, Prof. Bechtold and Ph. D. student Siyang Hu have attended the World Congress on Structural and Multidisciplinary Optimization (WCSMO) in Beijing, China.

Jade2Pro Ph.D. student Siyang Hu published the paper 'Fast Topology Optimization for Resonating Structures via Generalized Incremental Frequency Method and Modal Superposition-Based Model Order Reduction' and presented his paper in the conference. 

Prof. Dr. -Ing. Tamara Bechtold was the Chair of Session 'Dimension Reduction'.

 

     

Siyang Hu; Prof. Dr. -Ing. Tamara Bechtold

 

MicroSystems MOR Short Course in EuroSimE 2019

On March 24, 2019, Prof. Bechtold has given the short course 'System-Level Simulation of Mircosystems - MOR' in conference EuroSimE 2019 in Hannover.

Description: The rapid progress in microelectromechanical systems (MEMS) and the evolution from a limited set of well-established applications, examples, in automotive industry, print heads, and digital light projection, to other fields mainly driven by consumer applications (such as image stabilization, smart phones, game consoles, etc.) opens a new market for these devices. It simultaneously creates the need for fast, efficient, and adequate design and optimization tools not only for stand-alone devices, but also for entire multiphysics microsystems comprising the MEMS component, the attached control and read-out circuitry and the package, while additionally considering environmental impacts potentially affecting the system functionality. 
This 4 hours hand-on course provides an overview of system-level modelling methodologies for microsystems and offers an oportunity to test the industrial standard tool "Model Reduction inside ANSYS". 

Course Outline: 

Part 1: Compact Modeling of Microsystems by Means of Model Order Reduction - Theory

  • MOR: Principle and Methods
  • MEMS Case Studies

Part 2: Hand on MOR

  • Model Reduction inside ANSYS
  • System-Level Simulation with ANSYS Twin Builder

Literature:'System-Level Modeling of MEMS' (T. Bechtold, G. Schrag, L. Feng Edt.), by Wiley-VHC book series on Advanced Micro and Nanosystems 2013. 

Who Should Attend: The course is designed for anyone interested in system-level modelling and simulation. Being an ANSYS user is an advantage, but it is not mandatory.

 

Science Camp 2018 at University of Rostock

On November 22, 2018, the Ph.D. students of Jade2Pro project, Siyang Hu and Chengdong Yuan, presented their posters in Science Camp 2018 at University of Rostock.

  • Siyang Hu, Dennis Hohlfeld, Tamara Bechtold, ' Design Optimization of Multi-Resonant Microsystems Using Topology Optimization and Model Order Reduction'. (B49)
  • Chengdong Yuan, Gunasheela Sadashivaiah, Evgenii B. Rudnyi, Tamara Bechtold. ' Compact Thermal Model of Human Tissue'. (A12)

             

 

Papers have been accepted by the 12th International Conference on Scientific Computing in Electrical Engineering

From September 22 to 27, 2018, the 12th International Conference in Scientific Computing in Electrical Engineering (SCEE) was hosted in Taormina, Sicily, Italy. Two papers from our group have been accepted and presented in the conference.

Siyang Hu, Chengdong Yuan, Tamara Bechtold. Quasi-Schur Transformation for the Stable Compact Modeling of Piezoelectric Energy Harvester Devices.

Onkar Jadhav, Evgenii Rudnyi, Tamara Bechtold. Load Snapshot Based Nonlinear-Inut Model Order Reduction of a Thermal Human Tissue Model.

 

32nd European Conference on Modeling and Simulation

On May 22, 2018, the 32th European Conference on Modeling and Simulation (ECMS) has been held in the Jade University of Applied Sciences.

A group meeting with Prof. Dr. -Ing. Mashuq un Nabi and his research group from Indian Institue of Technology Delhi was held by Prof. Dr. -Ing. Tamara Bechtold during the conference.

 

Paper has been accepted by EuroSimE 2018

Paper 'Parametric Model Order Reduction of a Thermoelectric Generator for Electrically Active Implants' has been accepted and presented at the 19th EuroSimE in Toulouse, France.

In this paper, we analyzed a human tissue thermal model incorporated within an implanted thermoelectric generator (TEG). The impact of convection effect at the skin surface was studied based on a film coefficient and ambient temperature parameters-independent reduced order model obtained through parametric model order reduction (pMOR) method. We proposed to perform efficient parameter studies and system-level simulation based on the reduced TEG.

 

Paper has been accepted by Journal Microelectronics Reliability

Paper 'Stable Reduced Order Modeling of Piezoelectric Energy Harvesting Modules Using Implicit Schur Complement' has been accepted by Journal Microelectronics Reliablity. In this work, we presented an improved technique for reduced order modeling of a micromachined piezoelectric energy harvester and a novel frequency tunable piezoelectric energy harvester with segmented electrodes for improved power generation. A computationally efficient implicit Schur complement was developed for better conditioning of the numerical models. In combination with Krylov subspace-based model order reduction methods, it offers an efficient way to generate guaranteed stable reduced order models of multi-physical device models. We demonstrated an excellent match between the full-scale and the reduced order models of the harvester devices and established a methodology for the truly system-level simulation based on this reduced order numerical models.

 

Paper has been accepted by MATHMOD 2018

Student contribution ' Implicit Schur Complement for Model Order Reduction of Second Order Piezoelectric Energy Harvester Model '  has been accepted and presented at the  9th Vienna International Conference on Mathematical Modeling.

In this work, we introduced an alternative approach, implicit Schur complement transformation, for efficient one-sided reduction of the second order piezoelectric energy harvester model.

 

EU-MORNET Workshop: MOR 4 MECHATRONICS

On Feburary 2, 2018, EU-MORNET WORKSHOP: MOR 4 MECHATRONICS has been successfully held in Jade University of Applied Sciences in Wilhelmshaven. We aim to bring together the European theorist and practitioners working in the area of Model Order Reduction (MOR). 

During the workshop, the invited speakers shared their recent reseach results in the field of MOR and the applications of MOR theory in real-world mechatronics industry. A brain storm about the future of the MOR was given.

(In the photo: President of Jade University of Applied Sciences, Prof. Dr. Manfred Weisensee; Organizer, Prof. Dr. Tamara Bechtold; Invited speaker, Prof. Dr. Wil Schilders.)

 

Paper has been accepted by MikroSystem Kongress 2017

Paper 'Design of a thermoelectric generator for electrical active implants' has been accepted and presented at the MikroSystemTechnik Kongress 2017 in Munich. This project is a part of the project Collaborative Research Centre 1270 - 'ELAINE', which focuses on providing highly integrated electronic system for novel and electrically stimulating implants. 

In this work, we mainly presented a multiphysical model of a miniaturized thermoelectric generator for electrically active implants, which uses temperature gradients in human tissue. Based on this model, we analyzed the influence of the geometry and material parameters on the thermal and electrical properties and aim for an optimal transducer design. Furthermore, we used mathematical methods of model order reduction to create an accurate compact model, which can be applied in a system-level simulation.

 

M.Sc. Siyang Hu was granted a scholarship by the Jade2Pro-program

Since October 1, 2017, M.Sc. Siyang Hu has been granted a scholarship by the Ph.D. project (Jade2Pro-program) for the research project 'Design Optimization of Multimodel Microsystems using Topology Optimization and Model Order Reduction' involving the Jade University of Applied Sciences and the University of Rostock.

 

 

 

 

Paper has been accepted by AIM 2017 International Conference

Paper 'Model Order Reduction and System Simulation of a Machine Tool for Real-Time Compensation of Thermally Induced Deformations' has been accepted and presented at the IEEE International Conference on Advanced Intelligent Mechatronics 2017 in Munich.

This work presented the application of mathematical methods of model order reduction for automatic generation of highly accurate and compact models of strongly coupled thermo-mechanical machine tool model. In the further step, the reduced model was imported into the system-level simulation software. Based on the accurate reduced order model, a cascade controller was implemented to monitor and compensate the thermally induced deformations of a machine tool.

 

M.Sc. Chengdong Yuan was granted a scholarship by the Jade2Pro-program

M.Sc. Chengdong Yuan  joined the research group 'Modeling and Simulation of Mechatronic Systems' in Jade University of Applied Sciences. He was supported by the Jade2Pro-program since April 1, 2017. 

His research topic is  'Parametric Model Order Reduction of Miniaturized Energy Harvester Modules' , which is focused on providing efficient simulation models for the design optimization of energy harvest modules under the guidance of Prof. Dr. -Ing Tamara Bechtold in Jade University of Applied Sciences. This research project is also under the guidance of Prof. Dr. -Ing Dennis Hohlfeld in University of Rostock.