Milecki, Andrzej
Overview
| Works: | 9 works in 11 publications in 2 languages and 18 library holdings |
|---|---|
| Roles: | Author |
Publication Timeline
.
Most widely held works by
Andrzej Milecki
Wybrane metody poprawy właściwości liniowych serwonape̜dów elektrohydraulicznych : podstawy teoretyczne, konstrukcja, badania
symulacyjne i doświadczalne by
Andrzej Milecki(
Book
)
2 editions published in 1999 in Polish and held by 4 WorldCat member libraries worldwide
2 editions published in 1999 in Polish and held by 4 WorldCat member libraries worldwide
Liniowe serwonapędy elektrohydrauliczne : modelowanie i sterowanie by
Andrzej Milecki(
Book
)
2 editions published in 2003 in Polish and held by 3 WorldCat member libraries worldwide
2 editions published in 2003 in Polish and held by 3 WorldCat member libraries worldwide
Ćwiczenia laboratoryjne z elementów i układów automatyzacji by
Andrzej Milecki(
Book
)
1 edition published in 2000 in Polish and held by 2 WorldCat member libraries worldwide
1 edition published in 2000 in Polish and held by 2 WorldCat member libraries worldwide
Ciecze elektro- i magnetoreologiczne oraz ich zastosowania w technice by
Andrzej Milecki(
Book
)
1 edition published in 2010 in Polish and held by 2 WorldCat member libraries worldwide
1 edition published in 2010 in Polish and held by 2 WorldCat member libraries worldwide
Ciecze elektro- i magnetoreologiczne oraz ich zastosowania w technice by
Andrzej Ławniczak(
Book
)
1 edition published in 1999 in Polish and held by 2 WorldCat member libraries worldwide
1 edition published in 1999 in Polish and held by 2 WorldCat member libraries worldwide
Nowoczesne metody sterowania urządzeniami mechatronicznymi z napędami elektrohydraulicznymi(
Book
)
1 edition published in 2014 in Polish and held by 2 WorldCat member libraries worldwide
1 edition published in 2014 in Polish and held by 2 WorldCat member libraries worldwide
Application of geometry based hysteresis modelling in compensation of hysteresis of piezo bender actuator(
)
1 edition published in 2016 in English and held by 1 WorldCat member library worldwide
Abstract: This paper presents results of studies of an application of a new method of piezo bender actuators modelling. A special hysteresis simulation model was developed and is presented. The model is based on a geometrical deformation of main hysteresis loop. The piezoelectric effect is described and the history of the hysteresis modelling is briefly reviewed. Firstly, a simple model for main loop modelling is proposed. Then, a geometrical description of the non-saturated hysteresis is presented and its modelling method is introduced. The modelling makes use of the function describing the geometrical shape of the two hysteresis main curves, which can be defined theoretically or obtained by measurement. These main curves are stored in the memory and transformed geometrically in order to obtain the minor curves. Such model was prepared in the Matlab-Simulink software, but can be easily implemented using any programming language and applied in an on-line controller. In comparison to the other known simulation methods, the one presented in the paper is easy to understand, and uses simple arithmetical equations, allowing to quickly obtain the inversed model of hysteresis. The inversed model was further used for compensation of a non-saturated hysteresis of the piezo bender actuator and results have also been presented in the paper. Highlights: The geometrical description of hysteresis deformation is presented. A new, based on this description, simulation model of piezo element with hysteresis is proposed and implemented in Matlab-Simulink software. The model is used for the simulation of non-saturated hysteresis of the piezo bender actuator. The paper presents chosen simulation results, which are compared with results obtained in experimental investigations. The proposed model was inverted and used for the hysteresis compensation. Chosen piezo bender actuator hysteresis compensation results are presented
1 edition published in 2016 in English and held by 1 WorldCat member library worldwide
Abstract: This paper presents results of studies of an application of a new method of piezo bender actuators modelling. A special hysteresis simulation model was developed and is presented. The model is based on a geometrical deformation of main hysteresis loop. The piezoelectric effect is described and the history of the hysteresis modelling is briefly reviewed. Firstly, a simple model for main loop modelling is proposed. Then, a geometrical description of the non-saturated hysteresis is presented and its modelling method is introduced. The modelling makes use of the function describing the geometrical shape of the two hysteresis main curves, which can be defined theoretically or obtained by measurement. These main curves are stored in the memory and transformed geometrically in order to obtain the minor curves. Such model was prepared in the Matlab-Simulink software, but can be easily implemented using any programming language and applied in an on-line controller. In comparison to the other known simulation methods, the one presented in the paper is easy to understand, and uses simple arithmetical equations, allowing to quickly obtain the inversed model of hysteresis. The inversed model was further used for compensation of a non-saturated hysteresis of the piezo bender actuator and results have also been presented in the paper. Highlights: The geometrical description of hysteresis deformation is presented. A new, based on this description, simulation model of piezo element with hysteresis is proposed and implemented in Matlab-Simulink software. The model is used for the simulation of non-saturated hysteresis of the piezo bender actuator. The paper presents chosen simulation results, which are compared with results obtained in experimental investigations. The proposed model was inverted and used for the hysteresis compensation. Chosen piezo bender actuator hysteresis compensation results are presented
Investigations of electronic amplifiers supplying a piezobimorph actuator(
)
1 edition published in 2016 in English and held by 1 WorldCat member library worldwide
Abstract: Piezoelectric bending actuators, also known as bimorphs, are characterized by very good dynamic properties and by displacements in a range of a few millimeters. Therefore these actuators are used in a wide range of applications. However their usage is limited because they require supplying amplifiers with output voltage of about 200 V, which are rather expensive. This paper presents investigation results of such amplifiers with high voltage output. The model of a piezobending actuator is proposed and implemented in Matlab-Simulink software in order to simulate the behavior of the actuator supplied by the amplifiers. The simulation results are presented and compared with investigation results of high voltage amplifier used for supplying a piezoactuator. The influence of current limitation of operational amplifier on the actuator current is tested. Finally, a low cost audio power amplifier is proposed to control the piezobender actuator (as a cheaper alternative to the high-voltage amplifier) and its investigations results are presented in the paper. Highlights: The theoretical and simulation model of piezobimorph actuator dynamics is proposed and implemented in MATLAB-Simulink software. The paper presents the two amplifiers that were designed and built: one based on a high-voltage operational amplifier and one based on an audio amplifier. The simulation results are presented and compared with investigation results. The influences of amplifier output current limitation are tested. The investigation results have shown that the low cost audio amplifier can be successfully used for supply and control of piezobender actuator
1 edition published in 2016 in English and held by 1 WorldCat member library worldwide
Abstract: Piezoelectric bending actuators, also known as bimorphs, are characterized by very good dynamic properties and by displacements in a range of a few millimeters. Therefore these actuators are used in a wide range of applications. However their usage is limited because they require supplying amplifiers with output voltage of about 200 V, which are rather expensive. This paper presents investigation results of such amplifiers with high voltage output. The model of a piezobending actuator is proposed and implemented in Matlab-Simulink software in order to simulate the behavior of the actuator supplied by the amplifiers. The simulation results are presented and compared with investigation results of high voltage amplifier used for supplying a piezoactuator. The influence of current limitation of operational amplifier on the actuator current is tested. Finally, a low cost audio power amplifier is proposed to control the piezobender actuator (as a cheaper alternative to the high-voltage amplifier) and its investigations results are presented in the paper. Highlights: The theoretical and simulation model of piezobimorph actuator dynamics is proposed and implemented in MATLAB-Simulink software. The paper presents the two amplifiers that were designed and built: one based on a high-voltage operational amplifier and one based on an audio amplifier. The simulation results are presented and compared with investigation results. The influences of amplifier output current limitation are tested. The investigation results have shown that the low cost audio amplifier can be successfully used for supply and control of piezobender actuator
Electrohydraulic linear actuator with two stepping motors controlled by overshoot-free algorithm(
)
1 edition published in 2017 in English and held by 1 WorldCat member library worldwide
Highlights: The electrohydraulic proportional valve with two stepping motors is proposed. Theoretical equations and simulation models of the valve and servo drive are built. The new proportional valve is built, used in electrohydraulic servo drive and tested. The simulation results are presented and compared with investigation results. Algorithm for elimination of overshoot in drive step response is proposed and validated. Abstract: The paper describes electrohydraulic spool valves with stepping motors used as electromechanical transducers. A new concept of a proportional valve in which two stepping motors are working differentially is introduced. Such valve changes the fluid flow proportionally to the sum or difference of the motors' steps numbers. The valve design and principle of its operation is described. Theoretical equations and simulation models are proposed for all elements of the drive, i.e., the stepping motor units, hydraulic valve and cylinder. The main features of the valve and drive operation are described; some specific problem areas covering the nature of stepping motors and their differential work in the valve are also considered. The whole servo drive non-linear model is proposed and used further for simulation investigations. The initial simulation investigations of the drive with a new valve have shown that there is a significant overshoot in the drive step response, which is not allowed in positioning process. Therefore additional effort is spent to reduce the overshoot and in consequence reduce the settling time. A special predictive algorithm is proposed to this end. Then the proposed control method is tested and further improved in simulations. Further on, the model is implemented in reality and the whole servo drive system is tested. The investigation results presented in this paper, are showing an overshoot-free positioning process which enables high positioning accuracy
1 edition published in 2017 in English and held by 1 WorldCat member library worldwide
Highlights: The electrohydraulic proportional valve with two stepping motors is proposed. Theoretical equations and simulation models of the valve and servo drive are built. The new proportional valve is built, used in electrohydraulic servo drive and tested. The simulation results are presented and compared with investigation results. Algorithm for elimination of overshoot in drive step response is proposed and validated. Abstract: The paper describes electrohydraulic spool valves with stepping motors used as electromechanical transducers. A new concept of a proportional valve in which two stepping motors are working differentially is introduced. Such valve changes the fluid flow proportionally to the sum or difference of the motors' steps numbers. The valve design and principle of its operation is described. Theoretical equations and simulation models are proposed for all elements of the drive, i.e., the stepping motor units, hydraulic valve and cylinder. The main features of the valve and drive operation are described; some specific problem areas covering the nature of stepping motors and their differential work in the valve are also considered. The whole servo drive non-linear model is proposed and used further for simulation investigations. The initial simulation investigations of the drive with a new valve have shown that there is a significant overshoot in the drive step response, which is not allowed in positioning process. Therefore additional effort is spent to reduce the overshoot and in consequence reduce the settling time. A special predictive algorithm is proposed to this end. Then the proposed control method is tested and further improved in simulations. Further on, the model is implemented in reality and the whole servo drive system is tested. The investigation results presented in this paper, are showing an overshoot-free positioning process which enables high positioning accuracy
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