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Digital F: Elektrotechnik und Medientechnik S: TSZ Weißenburg

Design, implementation and testing of a model reference adaptive controller for an electric throttle valve are presented. An important step by design an adaptive controller is to find an adaptation mechanism. For this purpose, we employed the Lyapunov stability theory. The main challenge in this project originates from a certain term in the updating rules. This term contains the angular velocity, which is not measurable directly. Numerical differentiation of the measured angular position yields a noisy signal. To overcome this problem, we used a non-ideal derivative method. The use of a non-linear state observer based on extended Kalman filter could significantly enhance the control quality. This task is currently in progress.

Beitrag (Sammelband oder Tagungsband)

László Juhász, Amir Samiee, W. Engelbrecht

XCP Service Integration for Model-Based, Automatic Production Code Generation

Proceedings of IEEE EUROCON 2019 -18th International Conference on Smart Technologies

2019

DOI: 10.1109/EUROCON.2019.8861774

Digital F: Angewandte Informatik

Automated, model-based production code generation is widely used in the development and testing of electronic control units (ECUs). During ECU commissioning, extensive tests of the implemented control algorithms are required. Knowledge of the internal values and states of the ECU software are essential for verifying the correct software functionality by means of complex control algorithms. Calibration and measurement services make it possible to observe the ECU-internal memory values associated with the variables originating from the function model. Furthermore, the final adjustment of control parameters in the production ECU can be performed by means of calibration services. For these reasons, calibration and measurement through service integration is widely applied in both the automotive industry and other industrial fields. Integrating measurement and calibration services is therefore an important task for engineers working with model-based control development and, particularly, ECU production code integration. This paper describes an example integration of the Universal Measurement and Calibration Protocol (XCP) for model-based automatic code generation. The application used for the service integration is the commercially available Motor Control Education Kit (MEDKit) from Emerge-Engineering and dSPACE GmbH. The model-based automatic code generation is performed using the production code generator dSPACE TargetLink. The integration of the XCP on CAN protocol is completed in the scope of student projects. The upgraded MEDKit demonstrator will be used for education purposes in the Deggendorf Institute of Technology.

Patent

László Juhász, J. Lakemeier

Method for configuring a tester equipped for testing a control unit

2019

Digital F: Elektrotechnik und Medientechnik S: TSZ Weißenburg

Vortrag

Amir Samiee, J. Sahu, Nicolas Tiefnig, Michael Wagner, A. Baumgartner, László Juhász

Model-Driven Engineering in Education

18th International Conference on Mechatronics-Mechatronika 2018, Brno, Tschechische Republik

2018

Digital F: Elektrotechnik und Medientechnik S: TSZ Weißenburg

Beitrag (Sammelband oder Tagungsband)

Amir Samiee, J. Sahu, Nicolas Tiefnig, Michael Wagner, A. Baumgartner, László Juhász

Model-Driven Engineering in Education

Proceedings of the 2018 18th International Conference on Mechatronics – Mechatronika (ME) (December 5-7, 2018; Brno, Czech Republic)

2018

Mobil F: Elektrotechnik und Medientechnik S: TSZ Weißenburg

Vortrag

László Juhász, J. Sahu, Amir Samiee, Nicolas Tiefnig, Michael Wagner

Model-Driven Engineering in Education: Position Control of an Electronic Throttle Valve

5th EcETRAN International Conference for Electronics, Telecommunications, Computers, Automatic Control and Nuclear Engineering, Palić, Serbien

2018

Nachhaltig F: Elektrotechnik und Medientechnik

Zeitschriftenartikel

László Juhász, I. Juhász Junger

Spectral Analysis and Parameter Identification of Textile-Based Dye-Sensitized Solar Cells

Materials, vol. 11, no. 9

2018

DOI: 10.3390/ma11091623

Nachhaltig F: Elektrotechnik und Medientechnik

Zeitschriftenartikel

I. Juhász Junger, D. Wehlage, R. Döttjer, T. Grothe, László Juhász, C. Grassmann, T. Blachowicz, A. Ehrmann

Dye-Sensitized Solar Cells with Electrospun Nanofiber Mat-Based Counter Electrodes

Materials, vol. 11, no. 9

2018

DOI: 10.3390/ma11091604

Digital F: Elektrotechnik und Medientechnik

Textile-based dye-sensitized solar cells (DSSCs) can be created by building the necessary layers on a textile fabric or around fibers which are afterwards used to prepare a textile layer, typically by weaving. Another approach is using electrospun nanofiber mats as one or more layers. In this work, electrospun polyacrylonitrile (PAN) nanofiber mats coated by a conductive polymer poly(3,4-ethylenedioxythiopene) polystyrene sulfonate (PEDOT:PSS) were used to produce the counter electrodes for half-textile DSSCs. The obtained efficiencies were comparable with the efficiencies of pure glass-based DSSCs and significantly higher than the efficiencies of DSSCs with cotton based counter electrodes. The efficiency could be further increased by increasing the number of PEDOT:PSS layers on the counter electrode. Additionally, the effect of the post treatment of the conductive layers by HCl, acetic acid, or dimethyl sulfoxide (DMSO) on the DSSC efficiencies was investigated. Only the treatment by HCl resulted in a slight improvement of the energy-conversion efficiency.

Patent

László Juhász

Verfahren zur Konfiguration eines für das Testen eines Steuergeräts eingerichteten Testgeräts

2016

Digital F: Elektrotechnik und Medientechnik

Patent

László Juhász

Computerimplementiertes Verfahren zur Berechnung und Ausgabe von Steuerimpulsen durch eine Steuereinheit

2015

Extern

Beitrag (Sammelband oder Tagungsband)

F. Schütte, László Juhász, A. Tenge

Integration of EtherCAT in Advanced Test Systems - Solutions and Challenges

EtherCAT in Mobile Applications (ETG) 2013

2013

Zeitschriftenartikel

DOI: 10.1016/j.mechatronics.2013.06.008

Control of Hybrid Nanopositioning Systems for Trajectory-Tracking Applications

Mechatronics, vol. 23, no. 6, pp. 617-629

2013

In many industrial applications positioning systems are required to follow trajectory paths in the range of several centimeters and featuring at the same time a nanometre-range precision. Neither pure piezoelectric stages nor standard positioning systems with motor and spindle are able to meet such requirements as a single actuator, because of the small operation range on the one hand and inadequacies like backlash and friction on the other hand. Hybrid positioning systems, realized as a combination of a “coarse” and a “fine” actuator, aim to solve this problem. The wide range of applications enables a considerable market potential for such devices, but yields changing control requirements due to the high variety of possible positioned objects and positioning tasks and requires therefore a high-performance control system. In this paper a model-based control design for piezoelectric hybrid nanopositioning systems is presented. The proposed control consists of a multivariable state-feedback control on the basis of a novel plant representation offering a sufficient robustness. The designed control is realized and experimentally tested with a commercially available hybrid nanopositioning system featuring a DC drive, representing the coarse actuator, and a piezoelectric actuator utilized as fine actuator.

Beitrag (Sammelband oder Tagungsband)

J. Maas, László Juhász

Adaptive Regelung für piezoelektrisch-basierte Hybridsysteme

Konferenzband der SPS/IPC/Drives 2011 (Nürnberg)

2011

Beitrag (Sammelband oder Tagungsband)

Online Controller Optimization for Hybrid Micropositioning Systems

Proceedings of the IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM) [03.-07.07.2011, Budapest, Ungarn]

2011

Beitrag (Sammelband oder Tagungsband)

State-Space Control of Hybrid Micropositioning Systems for Industrial Applications

Konferenzband der VDI-Mechatroniktagung 2011 (31.03.-01.04.2011, Dresden)

2011

Zeitschriftenartikel

DOI: 10.2298/SJEE1102181J

FPGA-Based Control of Piezoelectric Actuators

Serbian Journal of Electrical Engineering, vol. 8, no. Mai (2), pp. 181-201

2011

DOI: 10.1016/j.mechatronics.2010.12.006

Zeitschriftenartikel

László Juhász, J. Maas, B. Borovac

Parameter identifications and hysteresis compensation of embedded piezoelectric stack actuators

Mechatronics, vol. 21, no. Februar (1), pp. 329-338

2011

A novel method for the identification of embedded piezoelectric stack actuator parameters in combination with a real-time capable hysteresis compensation measure is presented. The presented algorithms are based on the Maxwell resistive capacitor model and are particularly useful for the identification of piezoelectric actuators embedded in a high-precision micropositioning system where the disassembly of the complete system for separate actuator identification is not recommended or not possible. The parameter identification can be performed in a fully automated way and enables the adaptation of the compensation routine to the changed circumstances (temperature difference, wearing of actuators) as well. The hysteresis compensation method proposed here does not require significant CPU or memory resources. It can be implemented as an additional task on the already existing controller or a low-budget FPGA. As an example, the proposed method was validated experimentally by the parameter identification and hysteresis compensation of the piezoelectric actuators incorporated in a commercially available hybrid micropositioning system. The achieved experimental results are in very good agreement with the theoretical ones.

Beitrag (Sammelband oder Tagungsband)

László Juhász, T. Fichtner, A. Kiffe, J. Maas

Model-Based State-Space Control of Hybrid Micropositioning Systems

Proceedings of the 5th IFAC Symposium on Mechatronic Systems (September 2010, Cambridge, MA, USA)

2010

Beitrag (Sammelband oder Tagungsband)

László Juhász, A. Kiffe, J. Maas

Friction and Hysteresis Compensation of a Hybrid Micro-Positioning System

Proceedings of the 12th International Conference on New Actuators (ACTUATOR 10) [14.-16.06.2010, Bremen]

2010