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Suche nach „[B.] [Borovac]“ hat 8 Publikationen gefunden
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    Elektrotechnik und Medientechnik

    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

    DOI: 10.1016/j.mechatronics.2010.12.006

    Abstract anzeigen

    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.

    Elektrotechnik und Medientechnik

    Beitrag (Sammelband oder Tagungsband)

    J. Tasevski, László Juhász, J. Maas, B. Borovac

    Multiplicative and Additive Piezoelectric Hysteresis Compensation Methods for Real-Time Micropositioning Applications

    Proceedings of the 54th Conference for Electronics, Telecommunications, Computers, Automatic Control and Nuclear Engineering (Juni 2010, Donji Milanovac, Serbien)

    2010

    Elektrotechnik und Medientechnik

    Beitrag (Sammelband oder Tagungsband)

    László Juhász, A. Kiffe, J. Maas, B. Borovac

    FPGA-Based Interface for Fast Data Exchange between a Rapid Control Prototyping System and a Hybrid Micropositioning Stage

    Proceedings of the 53rd Conference for Electronics, Telecommunications, Computers, Automatic Control and Nuclear Engineering (15.-19.06.2009, Vrnjačka Banja, Serbien)

    2009

    Elektrotechnik und Medientechnik

    Zeitschriftenartikel

    László Juhász, L. Nagy, N. Adamović, B. Borovac, A. Vujanić

    A platform for micropositioning based on piezo legs

    Mechatronics, vol. 11, no. Oktober, pp. 869-897

    2001

    DOI: 10.1016/S0957-4158(00)00059-3

    Abstract anzeigen

    In this paper, we describe the development and prototype testing of a platform for micropositioning having three legs made of piezo tubes. Each piezo tube has four outer electrodes and one common inner electrode on its walls. By appropriate polarization of outer(s) electrode(s) with respect to the inner electrode, due to the inverse piezo effect, the tube wall will change its longitudinal dimension and the tube will bend in the corresponding direction. The platform motion is performed by successive slow bending and quick stretching of the tubes (i.e., legs). At this stage of development, the platform is connected by five wires to a power supply and a PC. The range of platform motion is limited only by the length of the wires connecting it to the power source. Electronic circuits for generating appropriate voltage signals are designed to be as simple as possible. This enabled the complete electronics and microcontroller for motion control to be placed onboard. The microcontroller is capable of realizing all operations needed for the motion execution and the communication with PC (containing the information about motion direction and step amplitude) can be done using a standard RS-232 interface. It was experimentally verified that, though being of a simple design, the platform allows a positioning accuracy which is below Full-size image (<1 K). Even more accurate positioning (below Full-size image (<1 K)) can be achieved in the “only bending” mode by simultaneous bending of all legs in a desired direction and without executing the legs' stretching. The platform capability to accomplish controlled complex motion using different motion velocities was demonstrated. Using a joystick, translation and rotation are easily achievable and the motion can be controlled in real time. Platform loading capacity allows some additional devices like a gripper, or any another device for a particular application to be mounted onboard. This enables the platform's potential use in a wide variety of applications.

    Elektrotechnik und Medientechnik

    Zeitschriftenartikel

    László Juhász, N. Adamović, B. Borovac, L. Nađ, S. Markov, A. Vujanić

    Moving platform for sample micropositioning

    Chemical Industry, vol. 54, no. Mai, pp. 243-257

    2000

    Elektrotechnik und Medientechnik

    Beitrag (Sammelband oder Tagungsband)

    László Juhász, L. Nagy, N. Adamović, B. Borovac, A. Vujanić

    Development of Platform for Micro-Positioning Actuated by Piezo-Legs

    Proceedings of the 2000 IEEE International Conference on Robotics and Automation (ICRA) [24.-28.04.2000, San Francisco, CA, USA]

    2000

    Elektrotechnik und Medientechnik

    Beitrag (Sammelband oder Tagungsband)

    T. Lozanovski, László Juhász, N. Adamović, B. Borovac, L. Nađ, A. Vujanić

    Realisation testing of platform for micro positioning using piezo-actuators

    Proceedings of ETRAN '98 (01.-05.06.1998, Vrnjačka Banja, Jugoslawien)

    1998

    Elektrotechnik und Medientechnik

    Beitrag (Sammelband oder Tagungsband)

    T. Lozanovski, László Juhász, L. Nagy, N. Adamović, B. Borovac, A. Vujanić

    Platform for micropositioning with piezo-actuators

    Proceedings of the 3rd International Symposium 'Interdisciplinary Regional Research (Hungary, Romania, Yugoslavia)' [Novi Sad, Jugoslawien, 24.-25.09.1998]

    1998