InformaApp - Publikationen

Digital Mobil Europan Campus Rottal-Inn

Despite substantial advances in many different fields of neurorobotics in general, and biomimetic robots in particular, a key challenge is the integration of concepts: to collate and combine research on disparate and conceptually disjunct research areas in the neurosciences and engineering sciences. We claim that the development of suitable robotic integration platforms is of particular relevance to make such integration of concepts work in practice. Here, we provide an example for a hexapod robotic integration platform for autonomous locomotion. In a sequence of six focus sections dealing with aspects of intelligent, embodied motor control in insects and multipedal robots—ranging from compliant actuation, distributed proprioception and control of multiple legs, the formation of internal representations to the use of an internal body model—we introduce the walking robot HECTOR as a research platform for integrative biomimetics of hexapedal locomotion. Owing to its 18 highly sensorized, compliant actuators, light-weight exoskeleton, distributed and expandable hardware architecture, and an appropriate dynamic simulation framework, HECTOR offers many opportunities to integrate research effort across biomimetics research on actuation, sensory-motor feedback, inter-leg coordination, and cognitive abilities such as motion planning and learning of its own body size.

Zeitschriftenartikel

de Oliveira Hansen, R. M. D., M. Mátéfi-Tempfli, R. Safonovs, J. Adam, S. Chemnitz, T. Reimer, B. Wagner, W. Benecke, Stefan Mátéfi-Tempfli

Magnetic films for electromagnetic actuation in MEMS switches

Microsystem Technologies, vol. 24, no. 4, pp. 1987-1994

2018

DOI: 10.1007/s00542-017-3595-2

This paper investigates the fabrication of magnetic films via electroplating to be applied into electromagnetic actuated micro electro-mechanical systems (MEMS) switches. Cobalt and nickel films (1 µm thicknesses) were deposited on gold coated silicon substrates via electrochemical deposition. Different deposition conditions were investigated, regarding temperature and deposition voltage. The films morphologies were characterized via atomic force microscopy, while the magnetic properties of the films were characterized via vibrating sample magnetometer measurements. In order to evaluate the integration of these magnetic films into MEMS switches with low energy consumption, a mathematical model was developed and the results show that these films can be applied into efficient actuation with reduced power dissipation.

Vortrag

A. Milosavljević, G. Víkor, Z. Pešić, Stefan Mátéfi-Tempfli, et al.

Guiding of Electrons by Al2O3 Nanocapillaries

Symposium on Condensed Matter Physics (SFKM), Vrsaca, Serbien

2017

Zeitschriftenartikel

P. Coman, Stefan Mátéfi-Tempfli, S. Veje, R. White

Modeling Vaporization, Gas Generation and Venting in Li-Ion Battery Cells with a Dimethyl Carbonate Electrolyte

Electrochemical Society Journal, vol. 164, no. 9

2017

This paper presents a mathematical model developed for predicting the temperature-pressure behavior and gas generation inside 18650 LCO/Graphite cells with a DMC (Dimethyl Carbonate) electrolyte. The cell was modeled using oven heating conditions, and the analysis was done at time intervals around the venting event. The paper also presents the thermodynamic property table for DMC, as extracted from different resources and calculated using various assumptions. The model was developed by deriving the energy balance for an unsteady-flow control volume and applying the isentropic flow equations corresponding to the venting of gas. The results show that the model fails to predict the pressure measured experimentally when no gas is generated inside. When adding the gas generation due to pre-venting reactions occurring, the model can predict the pressure profile measured experimentally.

Zeitschriftenartikel

J. Branch, M. Alibouri, D. Cook, P. Richardson, P. Bartlett, M. Mátéfi-Tempfli, Stefan Mátéfi-Tempfli, M. Bampton, T. Cookson, P. Connell, D. Smith

Plastic Reactor Suitable for High Pressure and Supercritical Fluid Electrochemistry

Journal of The Electrochemical Society, vol. 164, no. 6

2017

The paper describes a reactor suitable for high pressure, particularly supercritical fluid, electrochemistry and electrodeposition at pressures up to 30 MPa at 115°C. The reactor incorporates two key, new design concepts; a plastic reactor vessel and the use of o-ring sealed brittle electrodes. These two innovations widen what can be achieved with supercritical fluid electrodeposition. The suitability of the reactor for electroanalytical experiments is demonstrated by studies of the voltammetry of decamethylferrocene in supercritical difluromethane and for electrodeposition is demonstrated by the deposition of Bi. The application of the reactor to the production of nanostructures is demonstrated by the electrodeposition of ∼80 nm diameter Te nanowires into an anodic alumina on silicon template. Key advantages of the new reactor design include reduction of the number of wetted materials, particularly glues used for insulating electrodes, compatability with reagents incompatible with steel, compatability with microfabricated planar multiple electrodes, small volume which brings safety advantages and reduced reagent useage, and a significant reduction in experimental time.

P. Farhang, A. Drimus, Stefan Mátéfi-Tempfli

Vortrag

New Technique for Voltage Tracking Control of a Boost Converter Based on the PSO Algorithm and LTspice

57th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON), Riga, Lettland

2016

R. Brehm, S. Top, Stefan Mátéfi-Tempfli

Beitrag (Sammelband oder Tagungsband)

A distributed multi-agent linear bi-objective algorithm for energy flow optimization in microgrids

Proceedings of 2015 IEEE International Renewable and Sustainable Energy Conference (IRSEC'15)

2016

ISBN: 978-1-4673-7894-9

V. Jankovics, Stefan Mátéfi-Tempfli, P. Manoonpong

Beitrag (Sammelband oder Tagungsband)

Artifcial neural network based complaint control for robot arms

From Animals to Animats 14, vol. 9825

2016

ISBN: 978-3-319-43488-9

P. Farhang, Stefan Mátéfi-Tempfli

Vortrag

A New Approach to Control the Modified LinVerter for High Frequency Applications

IEEE Applied Power Electronics Conference (APEC2106), Long Beach (Los Angeles), CA, USA

2016

Zeitschriftenartikel

H. Bülter, G. Denuault, Stefan Mátéfi-Tempfli, M. Mátéfi-Tempfli, C. Dosche, G. Wittstock

Electrochemical analysis of nanostructured iron oxides using cyclic voltammetry and scanning electrochemical microscopy

Electrochimica Acta, vol. 222, pp. 1326-1334

2016

Iron oxides in general and especially hematite, α-Fe2O3, have become promising materials for the alkaline water electrolysis and photoelectrochemical water splitting, respectively. In the present study electrocatalytic electrodes with a thin film of α-Fe2O3 and with vertically aligned α-Fe2O3 nanowires were prepared. Cyclic voltammograms of the α-Fe2O3 nanowires revealed differences including a series of three unreported cathodic signals when compared to previously published voltammograms for polycrystalline iron oxides. The generation-collection mode of scanning electrochemical microscopy (SECM) using nanostructured Pt microdisc probes was exploited to detect soluble reaction products formed at the voltammetric peaks of the α-Fe2O3 electrode. SECM tip-substrate voltammetry unexpectedly showed that the reduction of FeVI to FeIII on the cathodic sweep is accompanied by significant O2 evolution.

P. Farhang, Stefan Mátéfi-Tempfli

Beitrag (Sammelband oder Tagungsband)

A New Approach to Control the Modified LinVerter for High Frequency Applications

Proceedings of the 31st Annual IEEE Applied Power Electronics Conference and Exposition (APEC2016) [March 20-24, 2016; Long Beach, USA]

2016

Vortrag

A. Drimus, V. Jankovics, M. Gorsic, Stefan Mátéfi-Tempfli

Novel high resolution tactile robotic fingertips

IEEE SENSORS 2014, Valencia, Spanien

2015

Vortrag

Oliveira Hansen, R. M. D., M. Mátéfi-Tempfli, S. Chemnitz, T. Reimer, B. Wagner, Stefan Mátéfi-Tempfli, W. Benecke, H.-G. Rubahn

Electromagnetic actuation in MEMS switches

100% CLIMATE NEUTRALITY Conference, Sønderborg, Denmark

2015

A. Drimus, Stefan Mátéfi-Tempfli

Beitrag (Sammelband oder Tagungsband)

Tactile shoe inlays for high speed pressure monitoring

Intelligent Robotics and Applications, Berlin, vol. 9245

2015

ISBN: 978-3-319-22876-1

R. Brehm, S. Top, Stefan Mátéfi-Tempfli

Vortrag

A distributed multi-agent linear bi-objective algorithm for energy flow optimization in microgrids

3rd International Renewable and Sustainable Energy Conference (IRSEC'15), Marrakech-Ouarzazate, Morocco

2015

P. Farhang, A. Drimus, Stefan Mátéfi-Tempfli

Beitrag (Sammelband oder Tagungsband)

New technique for voltage tracking control of a boost converter based on the PSO algorithm and LTspice

2015 56th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON)

2015

DOI: 10.1109/RTUCON.2015.7343157

L. Duggen, Stefan Mátéfi-Tempfli

Vortrag

Forces in Liquid Metal Contacts

ASME 12th Biennial Conference on Engineering Systems Design and Analysis - ESDA 2014, Kopenhagen, Dänemark

2014

Vortrag

A. Drimus, V. Jankovics, M. Gorsic, Stefan Mátéfi-Tempfli

High Resolution Tactile Sensors for Curved Robotic Fingertips

3rd International Conference on "Living Machines", Mailand, Italien

2014

Vortrag

Stefan Mátéfi-Tempfli

Mechatronics

Track chair

ASME 2014: 12th Biennial Conference on Engineering Systems Design and Analysis : Engineering Systems; Heat Transfer and Thermal Engineering; Materials and Tribology; Mechatronics; Robotics, Copenhagen, Denmark

2014

L. Duggen, Stefan Mátéfi-Tempfli

Beitrag (Sammelband oder Tagungsband)

Forces in Liquid Metal Contacts

Proceedings of the ASME 12th Biennial Conference on Engineering Systems Design and Analysis--2014, New York, N.Y.

2014

ISBN: 978-0-7918-4585-1

DOI: 10.1115/ESDA2014-20114