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Journal of KONES
EN Pistons of internal-combustion engines are the most loaded elements of internal-combustion engines, belong to these specialistic elements, which have essential influence on the ecological properties of engines, their durability and reliability. The object of paper is pistons manufactured from the st[...]
Journal of Theoretical and Applied Mechanics
2012 Vol. 50 nr 2 509-530
PL W artykule przedstawiono nieliniowy matematyczny model opisujący histerezę suchego kontaktu ciał chropowatych, który został obciążony w kierunku normalnym. Kilka charakterystycznych zjawisk pojawia się podczas pierwszego obciążania, odciążania i powtórnego obciążania. Kontakt ciał jest najbardziej p[...]
EN This paper presents a non-linear mathematical model describing the hysteresis of dry contact of rough surfaces loaded in the normal direction. A number of characteristic phenomena appear during the initial loading, unloading and reloading of the contact interface. The contact is most flexible during[...]
Archives of Electrical Engineering
EN Some physical concepts important for a hysteresis model (effective field, anhysteretic magnetization) are discussed on the example of Jiles-Atherton model. The Jiles-Atherton model reveals some drawbacks, which make this model more difficult to be applied in electrical engineering. In particular, it[...]
Control and Cybernetics
EN Piezoelectric actuators are widely used in micromanipulation tasks such as atomic force microscopy and cell manipulation. However, the hysteresis nonlinearity and the creep reduce their fidelity and cause difficulties in the micromanipulation control procedure. Besides, variation of temperature and [...]
Materials Science Poland
2008 Vol. 26, No. 3 659--673
EN A detailed study has been presented of optical, electrical, structural and magnetic properties of Zn1.xCoxO (0 < x ≤ 0.25) films co-doped with 1 at. % of Al. The polycrystalline films have been synthesized on Corning glass 7059 substrates by the sol-gel technique using spin coating. Highly preferent[...]
Zeszyty Naukowe. Cieplne Maszyny Przepływowe - Turbomachinery / Politechnika Łódzka
1999 nr 115 123--130
EN Rotating stall is an interesting phenomenon that occurs in both axial and radial rotors. It is still poorly recognized in radial rotors. That was the reason to carry out investigations of pressure oscillation in streams, loudness and flow to find a possibility of the hysteresis elimination by the en[...]
Systems Science
EN McKibben muscle is a kind of pneumatic artificial muscle. It can be used as the actuator to drive the robot and the rehabilitation device. So, its force characteristic is very important in order to control the contraction and extension of the McKibben muscle for the applications in the robot field. [...]
Archives of Thermodynamics
EN The paper presents an experimental study of boiling on heating surfaces covered with copper fibrous porous layers used as a filling of heat pipes. The knowledge of thermal characteristics of capillary-porous structures is indispensable in the design and construction of heat exchangers utilizing the [...]
Archives of Thermodynamics
EN There were presented the results of theoretical analysis of boiling heat transfer on heating surfaces covered with thin-layered capillary porous structures. Heat transfer probabilistic model was proposed. It was then compared with experimental results of II type hysteresis. The results of investigat[...]
Molecular and Quantum Acoustics
2003 Vol. 24 89-96
EN Acoustic properities of a ferrofluid subject to an external magnetic filed depend on the sweep rate. The magnetic filed determines the mode and degree of aggregations of the magnetic particles and their association into chain-like clusters. After the removal of the filed the ferrofluid does not retu[...]
Opuscula Mathematica
EN We consider the solvability of the semilinear parabolic differential equation [formula] in a cylinder D = Ω x (0, T), where Ρ is a hysteresis operator of Preisach type. We show that the corresponding initial boundary value problems have unique classical solutions. We further show that usin[...]
Journal of Theoretical and Applied Mechanics
2016 Vol. 54 nr 2 321--332
EN In this paper, analysis of a half-car model with linear and nonlinear semi-active dampers is performed. Using Matlab-Simulink software, a response of the system to a harmonic excitation of variable frequency and to an impulse excitation is found. The effect of both the distribution of spring-support[...]
International Journal of Electronics and Telecommunications
EN The aim of this paper is to present the analysis and modeling of the hysteresis phenomenon using a Preisach operator. The fundamentals of parameterized hysteresis modeling are introduced, by utilizing three probability density functions. Then, the Preisach operator and its characteristics are define[...]
Advances in Science and Technology Research Journal
2017 Vol. 11, no 3 240--245
EN The paper deals with the possibilities of measuring the residual displacement or hysteresis on the lateral direction of the movement forces caused by the cutting forces of the machining. A special adjustment of laser interferometry assemblies was used for measurement. The measurement results indicat[...]
Advances in Science and Technology Research Journal
EN One of the factors affecting the accuracy of Coordinate Measuring Systems is hysteresis of a probe head. It is important especially in case of touch trigger probes and should be taken into account during the determination of probing strategy. In this article, the authors try to assess how this pheno[...]
TASK Quarterly : scientific bulletin of Academic Computer Centre in Gdansk
EN Variations in the thermodynamic state of a dispersive medium, caused by sound, are studied. A bubbly liquid and a Maxwell fluid are considered as examples. Curves in the plane of thermodynamic states are plotted. They are in fact pictorial images of linear relations of excess pressure and excess den[...]
Acta Geophysica Polonica
EN Rate-independent hysteresis arising from the multi-valued soil-moisture char-acteristic has been ignored in almost all hydrological models. This paper introduces the concept of rate-independence in a hydrological context and shows how to insert rate-independent hysteresis in conceptual hydrological [...]
Journal of Automation Mobile Robotics and Intelligent Systems
EN This paper presents a mobile ferrograph system for measurement of magnetic parameters of ultrahigh permeability alloys. The structure of developed system is described, as well as exemplary measurement results of Co67Fe3Cr3B12Si15 alloy used in space applications are presented.
Transactions of the Institute of Fluid-Flow Machinery
2003 nr 112 91-102
EN Capillary-porous structures (CPS) do not only enhance boiling heat transfer, they also may cause the increase in the value of the critical heat flux. Apart from boiling crisis, resulting, as for a smooth surface, in the wall burnout, in CPS there also occurs the so-called "intra-layer- boiling crisi[...]
Archives of Electrical Engineering
2017 Vol. 66, nr 4 751--760
EN The paper presents the design procedure and elaborated software for designing calculation of the shape memory alloy (SMA) actuator. The thermo-mechanical behavior of a linear SMA actuator has been studied. The experimental set-up was especially designed to perform the thermo-mechanical characterizat[...]
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