News

August 16, 2019

Regular Meeting in University Rostock

 

Due to the project collaborations between the research Group of Prof.Dr.-Ing Tamara Bechtold (Jade University of Applied Science) and Prof.Dr.-Ing Dennis Hohlfeld (University Rostock), the regular meeting has been held in University Rostock. The agenda of the meeting is shown as follows:

 

10:00 - 11:30

Meeting on the design of piezoelectric energy-harvester (T. Bechtold, S.Y. Hu, A. Schütz, S. Bouhedma, D. Hohlfeld in S14),
Meeting on MOR for TEG (C.D. Yuan, G. Sadashivaiah, A. Roy in L127)

11:30 - 12:30
Lab facilities at IGS (cleanroom, labs) (A. Roy, A. Schütz, D. Hohlfeld)

 

  

Laboratory tour in University of Rostock, Institute of Electronic Appliances and Circuits
Fig.1: A. Schütz, C.D. Yuan, Porf.Dr.-Ing D. Hohlfeld, S.Y. Hu, G. Sadashivaiah
Fig.2 A. Schütz, S.Y. Hu

     

12:30 - 14:00
Joint lunch at Mensa Südstadt

 

14:00 - 15:00
PhD progress meeting Hu (S.Y. Hu, T. Bechtold, D. Hohlfeld in S14), subsequently DFG proposal optimum discussion (S. Hu, T. Bechtold, J.G. Korvink via Skype in L126)

Measurement setup for the piezoelectric energy-harvester (S. Bouhedma, A. Schütz in S32)

15:00 - 15:45
PhD progress meeting C.D. Yuan (C.D. Yuan, T. Bechtold, D. Hohlfeld in S14)

Introduction into TEG design and measurements (G. Sadashivaiah, A. Schütz, T. Globisch in S32)

15:45 - 16:15
Interview for the Jade2Pro2.0 scholarship (D. Hohlfeld, T. Bechtold, A. Schütz)

16:15 - 17:30
Meeting on design of TEG for medical implants (C.D. Yuan, G. Sadashivaiah, A. Roy, D. Hohlfeld, T. Bechtold, A. Schütz, (S. Hu - if interested) in Ex116)

 

18:00

Joint dinner - all

 

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

June 11-14, 2019

33rd International ECMS Conference on Modeling and Simulation

 

On June 11-14 , 2019, Jade2Pro 2.0 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.

 

 

Ph. D. student Chengdong Yuan was presenting his project

 

May 20-24, 2019

World Congress of Structural and Multidisciplinary Optimization

 

On May 20-24 , 2019, Prof. Bechtold and her Ph. D. student Siyang Hu attended the World Congress on Structural and Multidisciplinary Optimization in Beijing, China.

WCSMO aims to provide a platform for researchers and practitioners in the field of structural and multidisciplinary optimization. Jade2Pro 2.0 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. 

 

 

Ph. D. student Siyang Hu was presenting his project

 

Prof. Bechtold was the Chair of Session 'Dimension Reduction'

 

March 24, 2019

MicroSystems MOR Short Course in EuroSimE conference 2019

 

On March 24, 2019, Prof. Bechtold will give 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


Litterature:"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.

 

Please check the schedule of all short courses in EuroSimE 2019 in the link:

https://www.eurosime.org/index.php/short-courses/

 

November 22, 2018

Science Camp 2018 in University Rostock

 

On November 22th, the Ph.D. students of Jade2Pro 2.0 project, Mr. Yuan and Mr. Hu, presented their research posters in Science Camp 2018 in University Rostock.

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

A further group discussion with the ELIANE group in University Rostock is processed. We aim to have an long-term cooperation with University Rostock in the European projecct ELAINE.

 

 

Siyang Hu, Chengdong Yuan

 

     

September 22, 2018

12th International Conference on Scientific Computing in Electrical Engineering in Taormina, Italy

 

During Sep.22th to 27th, the 12th International Conference in Scientific Computing in Electrical Engineering was hosted in Taormina, Sicily, Italy. This time, two papers from our group had been accepted and presented in the conference.

 

May 22, 2018

32nd European Conference on Modelling and Simulation in Wilhelmshaven

 

The European Conference on Modelling and Simulation (ECMS) is the annual conference of the European Council for Modelling and Simulation, an independent forum of European academics and practitioners dedicated to research, development, and applications of modelling and simulation.

ECMS 2018 is hosted by Jade University of Applied Sciences.

Research group in Rostock, which has the collaboration with our group in Wilhelmshaven, published papers:

A discussion with Prof. Dr. Mashuq un Nabi and his research group from Indian Institue of Technology Delhi was processed during the conference.

 

April 16, 2018

Best paper candidate at EuroSimE 2018

 

Paper "Parametric Model Order Reduction of a Thermoelectric Generator for Electrically Active Implants'" was presented at 19th EuroSimE in Toulouse and selected as one of the best paper candidates.

In this paper, we analyze a thermal model of human tissue with an implanted generator. The impact of convection at the skin surface is studied by applying parametric model order reduction with film coefficient and ambient temperature as parameters. We propose to use our approach for efficient parameter studies and the co-simulation of generator and electric circuitry.

 

Comparison of temperature differences across thermoelectric generator as obtained from the full and reduced models

 

Paper Link: Full paper in pdf

 

March 01, 2018

Journal paper accepted by Journal 'Microelectronics Reliability'!

 

Paper "Stable Reduced Order Modeling of Piezoelectric Energy Harvesting Modules Using Implicit Schur Complement" is accepted by Journal Microelectronics Reliablity. This project is cooperated with the research group with topic "Flexibles Vibration Energy Harvesting" in University Rostock.

In this work, we present 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 is developed for better conditioning of the numerical models. In combination with Krylov subspace based model order reduction methods, it offers an effi cient way to generate guaranteed stable reduced order models of multi-physical device models. We demonstrate an excellent match between the full-scale and the reduced order models of the harvester devices and establish a methodology for the truly system-level simulation based on this reduced order numerical models.

 

Flexibles vibration energy harvesting device

 

Paper Link: https://www.sciencedirect.com/science/article/pii/S0026271418301458

 

February 21, 2018

Student contribution presented at MATHMOD 2018

 

Student contribution "mplicit Schur Complement for Model Order Reduction of Second Order Piezoelectric Energy Harvester Model" was presented at 9th Vienna International Conference on Mathematical Modeling.

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

 

System-level representation of piezoelectric energy harvester model

 

Paper Link: Full paper in pdf

 

February 2, 2018

EU-MORNET Workshop: MOR 4 MECHATRONICS

 

On 2nd Feburary, EU-MORNET WORKSHOP: MOR 4 MECHATRONICS was successfully held in Jade University of Applied Science in Wilhelmshaven. We aim to bring together the European theorist and practitioners working in the area of Model Order Reduction (MOR) for the system level simulation of mechatronic system. 

During the one day 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 mechatronics was given.

 

University President Prof. Dr. Manfred Weisensee, organizer Prof. Dr. Tamara Bechtold and invited speaker Prof. Dr. Wil Schilders

 

Website Link: MOR4MECHATRONICS

News Link: Jade Hochschule-100 fache Beschleunigung der Rechnerleistung

 

October 23, 2017

Paper presented at MikroSystemTechnik Congress 2017

 

Paper "Design of a thermoelectric generator for electrical active implants" was presented at MikroSystemTechnik 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 present a multiphysical model of a miniaturized thermoelectric generator for electrically active implants, which uses temperature gradients in human tissue. Based on this model, we analyze the influence of the geometry and material parameters on the thermal and electrical properties and aim for an optimal transducer design. Furthermore, we use mathematical methods of model order reduction to create an accurate compact model that can be applied within a system simulation.

 

Schematics of a thermo-electrically driven implant for application below the skin

 

Paper Link: https://ieeexplore.ieee.org/document/8278689/

 

October 01, 2017

New research member! M.Sc. Hu was granted the scholarship of Jade2Pro2.0

 

Since October 2017, M.Sc Hu Siyang has been granted a scholarship by the Jade PhD program (Jade2Pro) for a research project involving the Jade University of Applied Sciences and the University of Rostock to pursue a PhD with the title:

'Design Optimization of Multimodel Microsystems using Topology Optimization and Model Order Reduction'

July 04, 2017

Paper presented at AIM 2017 International Conference

 

Our paper "Model Order Reduction and System Simulation of a Machine Tool for Real-Time Compensation of Thermally Induced Deformations" was presented at IEEE International Conference on Advanced Intelligent Mechatronics 2017 in Munich.

This work presents 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 is imported into the system-level simulation. Based on the accurate reduced order model, a cascade controller is implemented to monitor and compensate the thermally induced deformations of a machine tool.

 

Thermo-mechanical system of machine tool using MOR workflow

 

Paper Link: https://ieeexplore.ieee.org/document/8014161/

 

May 17, 2017

M.Sc. Yuan was granted the scholarship of Jade2Pro2.0

C.D. Yuan and Prof. Dr. -Ing T. Bechtold are discussing the miniaturized energy converter

 

M. Sc. Yuan Chengdong joined the research group of Prof. Dr. -Ing Tamara Bechtold and was supported by the Jade2Pro2.0 PhD program of Jade University of Applied Sciences since April in 2017. 

His research topic is 'Parametric Model Order Reduction of MEMS-based Energy Harvester Modules', which is focused on providing efficient simulation models for the design optimization of energy harvest modules. This research is also cooperated with Prof. Dr. -Ing Dennis Hohlfeld in University Rostock.

 

News Link: Nordwest Zeitung