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Tytuł:
Distribution of Random Pulses Forcing a Damped Oscillator Determined in a Finite Time Interval
Autorzy:
Ozga, A.
Powiązania:
https://bibliotekanauki.pl/articles/1196915.pdf
Data publikacji:
2014-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
45.05.+x
45.30.+s
45.90.+
Opis:
Solving a stochastic problem for systems subjected to random series of pulses is, in the present case, aimed at determining of an approximate distribution of amplitudes of random pulses forcing vibrations of an oscillator with damping. The applied model of investigations indicated the source of difficulties connected with interpretation of the obtained results. Another issue discussed in the paper is how a change of the damping coefficient b of the system may result in a decrease of the difference between the actual distribution of random pulses and that determined from the waveform.
Źródło:
Acta Physica Polonica A; 2014, 125, 4A; A-159-A-163
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Controlling Chaos in Damped and Driven Morse Oscillator via Slave-Master Feedback
Autorzy:
Behnia, S.
Akhshani, A.
Panahi, M.
Asadi, R.
Powiązania:
https://bibliotekanauki.pl/articles/1400187.pdf
Data publikacji:
2013-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
05.45.-a
05.45.Gg
05.45.Pq
Opis:
The dynamical behavior of the Morse oscillator is investigated primarily by means of the Lyapunov exponent and bifurcation diagrams. Then, the problem of controlling chaos for this oscillator is studied using a new method introduced by Behnia and Akhshani, which is based on the construction of slave-master feedback. In the control model based on slave-master feedback, the oscillator as the slave system is coupled with a dynamical system as the master, so its implementation becomes quite simple and similar statements can be made for the high dimensional cases. The validity of this method is verified by numerical simulations. The obtained results show the effectiveness of the proposed control model.
Źródło:
Acta Physica Polonica A; 2013, 123, 1; 7-12
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chaotic Phenomena in a Simple 3D Autonomous Circuit with a Diode Pair
Autorzy:
Kandiban, G.
Manimaran, S.
Balachandran, A.
Powiązania:
https://bibliotekanauki.pl/articles/1489819.pdf
Data publikacji:
2012-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
05.45.-a
05.45.Xt
05.45.Ac
Opis:
The simple 3D-chaotic dynamics of an autonomous oscillator circuit was studied by measuring its responsible in the form of phase-portrait, power spectrum and chaotic time series. The new realization combines attractive features of the current feedback op-amp operating in both voltage and current modes to construct the active linear negative conductance. The component count is reduced and the chaotic spectrum is extended to higher frequencies. In addition, a buffered and isolated voltage output directly representing a state variable is made available. The circuit consists of just three linear elements (two capacitors and one inductor), one linear negative conductance and two ideal diodes. The power spectra are presented to confirm the strong chaotic nature of the oscillations of the circuit. The performance of the circuit is investigated by means of experimental simulation and numerical confirmation of the appropriate differential equations. The features of the obtained results are respected for various engineering systems such as chaos communication systems with robustness against various interferences.
Źródło:
Acta Physica Polonica A; 2012, 121, 3; 586-588
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Route to Chaos in Generalized Logistic Map
Autorzy:
Rak, R.
Rak, E.
Powiązania:
https://bibliotekanauki.pl/articles/1388178.pdf
Data publikacji:
2015-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
05.45.-a
05.45.Pq
05.45.Gg
Opis:
We postulate a generalization of well-known logistic map to open the possibility of optimization the modelling process of the population evolution. For proposed generalized equation we illustrate the character of the transition from regularity to chaos for the whole spectrum of model parameters. As an example we consider specific cases for both periodic and chaotic regime. We focus on the character of the corresponding bifurcation sequence and on the quantitative nature of the resulting attractor as well as its universal attribute (Feigenbaum constant).
Źródło:
Acta Physica Polonica A; 2015, 127, 3A; A-113-A-117
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Pulse Amplitudes on Quality of Determining Distribution of Pulses Forcing Vibration of an Damped Oscillator
Autorzy:
Ozga, A.
Powiązania:
https://bibliotekanauki.pl/articles/1402185.pdf
Data publikacji:
2015-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
45.05.+x
45.30.+s
45.90.+t
Opis:
The paper presents another phase of the study aimed at determining distributions of random pulses forcing vibration of an oscillator with damping. At this stage, the impact of the pulses amplitudes on distributions determined in a finite time interval is discussed. Application of a mathematical model in simulations allows to determine the differences between the distributions generated in MATLAB environment and those determined by a function. The experiment was designed so that the qualitative analysis of the issue was possible.
Źródło:
Acta Physica Polonica A; 2015, 128, 1A; A-67-A-71
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Laws of Dissolution of Copper Electrodes Polarized by the Alternating Current in Solution of Potassium Iodide
Autorzy:
Kadirbayeva, A.
Bayeshov, A.
Powiązania:
https://bibliotekanauki.pl/articles/1402510.pdf
Data publikacji:
2015-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
82.45.Aa
82.45.-h
Opis:
Electrochemical behavior of copper in solution of potassium chloride under polarization with industrial alternating current is investigated. It is shown, that at polarization of copper-titanium electrode pair by an alternating current with frequency of 50 Hz in the solution of potassium iodide the copper electrode is dissolved, forming compound of copper (I) iodide. It is also shown, that current efficiency of formation of copper (I) iodide is influenced by (i) the density of alternating current, (ii) concentration of potassium iodide and hydrochloric acid in solution. On the basis of the research the optimum conditions of obtaining of copper (I) iodide have been determined. At the optimum conditions the current efficiency of formation of copper (I) iodide was more than 100.0%. The advantages of the electrochemical method are the economical efficiency, simplicity of process, purity of the obtained product, electrolysis at room temperature, improvement of the working conditions.
Źródło:
Acta Physica Polonica A; 2015, 128, 2B; B-458-B-460
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impulsive Control and Synchronization of a New 5D Hyperchaotic System
Autorzy:
Kemih, K.
Bouraoui, H.
Messadi, M.
Ghanes, M.
Powiązania:
https://bibliotekanauki.pl/articles/1399676.pdf
Data publikacji:
2013-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
05.45.Gg
05.45.Xt
Opis:
This paper investigates the control and the synchronization of a new 5D hyperchaotic system. Based on the impulsive control theory, some new and less conservative criteria for the global exponential stability and asymptotical stability of impulsively controlled 5D hyperchaotic system, are obtained with varying impulsive interval. Finally, numerical simulations are given to demonstrate the effectiveness of the proposed control and synchronization methodology.
Źródło:
Acta Physica Polonica A; 2013, 123, 2; 193-195
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Transitions to Chaos and Chaos Synchronization for Solitons in the Presence of Spatially Inhomogeneous Forces
Autorzy:
Fronczak, P.
Hołyst, J. A.
Powiązania:
https://bibliotekanauki.pl/articles/2030484.pdf
Data publikacji:
2002-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
05.45.Pq
05.45.Yv
Opis:
Motion of kink solitons in the φ$\text{}^{4}$ model in the presence of external spatially inhomogeneous forces is studied. Depending on the system parameters various routes to chaos, i.e. Feigenbaum's scenario, type-I intermittency, and chaos-chaos intermittency are observed. Synchronization of chaotic solitons is investigated.
Źródło:
Acta Physica Polonica A; 2002, 101, 4; 465-476
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stable One-Dimensional Dissipative Solitons in Complex Cubic-Quintic Ginzburg-Landau Equation
Autorzy:
Aleksic, N. B.
Pavlovic, G.
Aleksic, B. N.
Skarka, V.
Powiązania:
https://bibliotekanauki.pl/articles/2047855.pdf
Data publikacji:
2007-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
45.65.Sf
45.65.Tg
Opis:
The generation and nonlinear dynamics of one-dimensional optical dissipative solitonic pulses are examined. The variational method is extended to complex dissipative systems, in order to obtain steady state solutions of the (1+1)-dimensional complex cubic-quintic Ginzburg-Landau equation. A stability criterion is established fixing a domain of dissipative parameters for stable steady state solutions. Following numerical simulations, evolution of any input pulse from this domain leads to stable dissipative temporal solitons. Analytical predictions are confirmed by numerical evolution of input temporal pulses towards stable dissipative solitons.
Źródło:
Acta Physica Polonica A; 2007, 112, 5; 941-947
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nodal Domains in Chaotic Microwave Rough Billiards with and without Ray-Splitting Properties
Autorzy:
Hul, O.
Savytskyy, N.
Tymoshchuk, O.
Bauch, S.
Sirko, L.
Powiązania:
https://bibliotekanauki.pl/articles/2044609.pdf
Data publikacji:
2006-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
05.45.Mt
05.45.Df
Opis:
We study experimentally nodal domains of wave functions (electric field distributions) lying in the regime of Breit-Wigner ergodicity in the chaotic microwave half-circular ray-splitting rough billiard. Using the rough billiard without ray-splitting properties we also study the wave functions lying in the regime of Shnirelman ergodicity. The wave functions Ψ$\text{}_{N}$ of the ray-splitting billiard were measured up to the level number N=204. In the case of the rough billiard without ray-splitting properties, the wave functions were measured up to N=435. We show that in the regime of Breit-Wigner ergodicity most of wave functions are delocalized in the n, l basis. In the regime of Shnirelman ergodicity wave functions are homogeneously distributed over the whole energy surface. For such wave functions, lying both in the regimes of Breit-Wigner and Shnirelman ergodicity, the dependence of the number of nodal domains Ɲ$\text{}_{N}$ on the level number N was found. We show that in the regimes of Breit-Wigner and Shnirelman ergodicity least squares fits of the experimental data reveal the numbers of nodal domains that in the asymptotic limit N→∞ coincide within the error limits with the theoretical predictionƝ$\text{}_{N}$/N≃ 0.062. Finally, we demonstrate that the signed area distribution Σ$\text{}_{A}$ can be used as a useful criterion of quantum chaos.
Źródło:
Acta Physica Polonica A; 2006, 109, 1; 73-87
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electrochemical Reactions to Form Composite Layers Aluminium Oxide-Metal
Autorzy:
Tomassi, P.
Powiązania:
https://bibliotekanauki.pl/articles/2035484.pdf
Data publikacji:
2002-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
82.45.Jn
82.45.Qr
Opis:
Processes leading to the formation of the composite layers aluminium oxide-metal have been investigated. Structure, composition, and other properties of this material have been examined. The mechanism of metal electrodeposition process is discussed.
Źródło:
Acta Physica Polonica A; 2002, 102, 2; 215-220
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Distribution of Stochastic Impulses Acting on an Oscillator as a Function of Its Motion
Autorzy:
Jabłoński, M.
Ozga, A.
Powiązania:
https://bibliotekanauki.pl/articles/1537460.pdf
Data publikacji:
2010-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
45.10.-b
45.30.+s
Opis:
In previous papers formulas have been derived describing distribution of a random variable whose values are positions of an oscillator at the moment t, which, in the interval [0, t], underwent the influence of stochastic impulses with a given distribution. In this paper we present reasoning leading to an opposite inference thanks to which, knowing the course of the oscillator, we can find the approximation of distribution of stochastic impulses acting on it. It turns out that in the case of an oscillator with damping the stochastic process $ξ_{t}$ of its deviations at the moment t is a stationary and ergodic process for large t. Thanks to this, time average of almost every trajectory of the process, which is the n-th power of $ξ_{t}$ is very close to the mean value of $ξ_{t}^{n}$ in space for sufficiently large t. Thus, having a course of a real oscillator and theoretical formulae for the characteristic function $ξ_{t}$ we are able to calculate the approximate distribution of stochastic impulses forcing the oscillator.
Źródło:
Acta Physica Polonica A; 2010, 118, 1; 74-77
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Observer-Based Synchronization of a New Hybrid Chaotic System and Its Application to Secure Communications
Autorzy:
Bouraoui, H.
Kemih, K.
Powiązania:
https://bibliotekanauki.pl/articles/1399718.pdf
Data publikacji:
2013-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
05.45.Gg
05.45.Xt
Opis:
This paper presents an interesting issue of using hybrid dynamical system to chaos synchronization and its application in secure communication using a new 5D hyperchaotic systems. The slave system is modeled by an unknown input observer, in which the unknown input issued from the hybrid system is the transmitted information. Based on the descriptor observer design, the Lyapunov stability theory and some robustness criteria, new sufficient synthesis conditions are given in terms of linear matrix inequalities that we can obtain the estimations of both the hybrid system states and the transmitted signals. Numerical examples are provided to show the performances of the proposed approach.
Źródło:
Acta Physica Polonica A; 2013, 123, 2; 259-262
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determining the Distribution of Values of Stochastic Impulses Acting on a Discrete System in Relation to Their Intensity
Autorzy:
Jabłoński, M.
Ozga, A.
Powiązania:
https://bibliotekanauki.pl/articles/1490330.pdf
Data publikacji:
2012-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
45.10.-b
45.30.+s
Opis:
In our previous works we introduced and applied a mathematical model that allowed us to calculate the approximate distribution of the values of stochastic impulses $η_{i}$ forcing vibrations of an oscillator with damping from the trajectory of its movement. The mathematical model describes correctly the functioning of a physical RLC system if the coefficient of damping is large and the intensity λ of impulses is small. It is so because the inflow of energy is small and behaviour of RLC is stable. In this paper we are going to present some experiments which characterize the behaviour of an oscillator RLC in relation to the intensity parameter λ, precisely to λ E(η). The parameter λ is a constant in the exponential distribution of random variables $τ_{i}$, where $τ_{i} = t_{i} - t_{i - 1}$, i = 1, 2, ... are intervals between successive impulses.
Źródło:
Acta Physica Polonica A; 2012, 121, 1A; A-174-A-178
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determining the Distribution of Stochastic Impulses Acting on a High Frequency System through an Analysis of Its Vibrations
Autorzy:
Jabłoński, M.
Ozga, A.
Korbiel, T.
Pawlik, P.
Powiązania:
https://bibliotekanauki.pl/articles/1504209.pdf
Data publikacji:
2011-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
45.10.-b
45.30.+s
Opis:
The motion of an oscillator with damping excited by impulses has the form $ξ_t = \frac{1}{\sqrt{a^2 - b^2}} \sum_{0
Źródło:
Acta Physica Polonica A; 2011, 119, 6A; 977-980
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Interaction between Polymer Brush and Nanoparticle: Brownian Dynamics Investigation
Autorzy:
Zhang, Q.
Xiang, X.
Powiązania:
https://bibliotekanauki.pl/articles/1400121.pdf
Data publikacji:
2013-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
05.45.Xt
05.45.Jn
Opis:
We use Brownian dynamics simulations to study the adsorption behavior of a nanosized particle on polymer brushes. The adsorption process, the dynamic behavior of the nanoparticle in brush, the penetration depth, and the diffusion coefficient of the nanoparticle in different depths of the brush are all investigated for different grafting densities. We provide an area density Γp, which is the area average of the monomer number above the embedded nanoparticle in brush. We find that this area density explains well qualitatively the experimental phenomenon that the nanoparticles exhibit a maximum in the adsorbed amount as a function of the grafting density of brush.
Źródło:
Acta Physica Polonica A; 2013, 123, 4; 642-646
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determining Parameters of an RLC Circuit Response to a Single Pulse
Autorzy:
Ozga, A.
Powiązania:
https://bibliotekanauki.pl/articles/1400081.pdf
Data publikacji:
2013-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
45.05.+x
45.05.+e
Opis:
Experimental determining of distributions of pulses forcing a linear system, where pulse amplitudes and occurrence instants are random values, is burdened with errors resulting from uncertainty of the measurement and the differences between the model and the physical phenomenon. The objective of this work is an attempt to minimize these errors through application of an approximation algorithm that allows to determine parameters of response of the system to a single pulse forcing. The conclusions issuing from the investigations indicate that the parameters of the vibrating system should be selected so that the impact of the local deformations that occur while the system is being forced on the parameters of the system response should be as small as possible.
Źródło:
Acta Physica Polonica A; 2013, 123, 6; 1034-1039
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of Ultrafast Schottky Diodes to High Megahertz Chaotic Oscillators
Autorzy:
Mykolaitis, G.
Tamaševičius, A.
Bumelienė, S.
Namajūnas, A.
Pyragas, K.
Pyragas, V.
Powiązania:
https://bibliotekanauki.pl/articles/1179720.pdf
Data publikacji:
2005-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
05.45.Ac
05.45.Pq
05.45.-a
47.52.+j
Opis:
The considered chaotic oscillator consists of an amplifier, 2nd order LC resonator, Schottky diode and an extra capacitor in parallel to the diode. The diode plays the role of a nonlinear device. Chaotic oscillations are demonstrated numerically and experimentally at low as well as at high megahertz frequencies, up to 250 MHz.
Źródło:
Acta Physica Polonica A; 2005, 107, 2; 365-368
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fast Chaos with Slow p-n Junction Diodes
Autorzy:
Mykolaitis, G.
Tamaševičiūtė, E.
Miškinis, R.
Bumelienė, S.
Tamaševičius, A.
Powiązania:
https://bibliotekanauki.pl/articles/1813384.pdf
Data publikacji:
2008-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
05.45.Ac
05.45.Pq
05.45.Gg
85.30.Kk
Opis:
We demonstrate both experimentally and numerically that slow recovery p -n junction diodes can be exploited to generate chaos at high megahertz frequencies. An extremely simple resonator consisting of an inductor in parallel with a diode when externally periodically driven exhibits chaotic response.
Źródło:
Acta Physica Polonica A; 2008, 113, 3; 971-974
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Two-Nucleon and Three-Nucleon System in Three Dimensions
Autorzy:
Topolnicki, K.
Golak, J.
Witała, H.
Skibiński, R.
Elmeshneb, A.
Powiązania:
https://bibliotekanauki.pl/articles/1402632.pdf
Data publikacji:
2015-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
25.10.+s
21.45.-v
21.45.Bc
21.45.Ff
Opis:
We present a brief overview of the three-dimensional formalism that is under development in our group. Using the 3D momentum eigenstates of the nucleon directly, instead of relying on the partial wave decomposition of operators involved in the calculations, allows us to use a very direct approach. This in turn enabled us to successfully tackle a large variety of few-body problems. Our calculation of the two nucleon transition operator and bound state can incorporate a very general form of the two-nucleon potential. Calculations of the three-nucleon bound state can include in addition to the two-nucleon potential also a very general operator form of the three-nucleon force. Recently the 3D formalism is also applied to processes that involve electro-weak probes. Carrying out these calculations for a wide spectrum of two-nucleon and three-nucleon potentials using the classical partial wave approach is unpractical due to the complicated spin structure of the operators. Using the 3D formalism, the calculations can be quickly adapted to test new models.
Źródło:
Acta Physica Polonica A; 2015, 127, 5; 1527-1528
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Survey on the Classical Limit of Quantum Dynamical Entropies
Autorzy:
Cappellini, V.
Powiązania:
https://bibliotekanauki.pl/articles/2047820.pdf
Data publikacji:
2007-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
05.45.-a
05.45.Mt
05.45.Ac
03.65.Fd
Opis:
We analyze the behavior of quantum dynamical entropies production from sequences of quantum approximants approaching their (chaotic) classical limit. The model of the quantized hyperbolic automorphisms of the 2-torus is examined in detail and a semi-classical analysis is performed on it using coherent states, fulfilling an appropriate dynamical localization property. Correspondence between quantum dynamical entropies and the Kolmogorov-Sinai invariant is found only over timescales that are logarithmic in the quantization parameter.
Źródło:
Acta Physica Polonica A; 2007, 112, 4; 589-605
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison between real time PID and 2-DOF PID controller for 6-DOF robot arm
Autorzy:
Adar, N.
Kozan, R.
Powiązania:
https://bibliotekanauki.pl/articles/1068202.pdf
Data publikacji:
2016-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
45.40.LN
45.80.+R
07.07.Tw
Opis:
Robotics and its applications have become increasingly important in the field of manufacturing industry. Robot manipulators are effectively used for this purpose. Control of manipulators is very important, however, highly nonlinear and multi-input multi-output (MIMO) complex structure of manipulators make the control difficult. This paper presents two-degree of freedom PID controller scheme for a six-degree of freedom rigid robotic manipulator. Traditional PID controllers are widely used due to their simple control structure and ease of implementation in industry. However load disturbances and parametric variation affect the robustness of the controller. The performance of proposed two-degree of freedom PID controller is compared with the traditional PID controllers. Matlab-Simulink program is used for real-time implementation of the proposed method. Experimental results show that two-degree of freedom PID control is better than the traditional PID for manipulator control in real time.
Źródło:
Acta Physica Polonica A; 2016, 130, 1; 269-271
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental and numerical determination of apparent mass variation of granular media confined in silo geometry
Autorzy:
Qadir, Abdul
Ispalove, Nurlybek
Ali, Asim
Chand, R.
Shah, M.
Khan, Asif
Hussain, Kashif
Powiązania:
https://bibliotekanauki.pl/articles/1070521.pdf
Data publikacji:
2016-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
83.80.Fg
45.70.Cc
45.70.-n
Opis:
Granular materials have vast applications both in industry and in daily life. They display quite interesting and exceptional properties different from the other known forms of matter. To investigate the complex properties of particulate materials, experimental, analytical, and numerical techniques have been employed. In this paper the results of experimental and numerical tests of various grain sizes and coefficient of friction between granules and cylindrical walls on the mass measured at bottom of container, known as apparent mass, are reported. It is revealed that apparent mass augments with the grain size. Moreover, it is also found that the variation in apparent mass measurement is strongly dependent on bead diameter rather than the silo size. The results suggest that the conversion of vertical stresses into horizontal in silo is mainly due to the friction between the grain and system boundary than the arching phenomenon.
Źródło:
Acta Physica Polonica A; 2016, 129, 3; 378-382
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electrolytic Plasma Surface Cleaning of Industrial Metallic Components
Autorzy:
Kumruoglu, L.
Özel, A.
Powiązania:
https://bibliotekanauki.pl/articles/1194881.pdf
Data publikacji:
2014-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.65.Kn
82.45.Qr
82.45.Hk
Opis:
Electrolytic plasma is an emerging, environmentally friendly surface engineering technology that can be used for cleaning of metal surfaces and removing several coating. The present work was concerned with cleaning of corrosion products (oxides and contamination) on steel surfaces for corrosion protection. The effects of processing parameters on cleaning steel surfaces were investigated. The results show that electrolytic plasma can effectively produce clean surfaces and remove iron oxides. Also the arc spray coatings deposited on steel was removed by electrolytic plasma.
Źródło:
Acta Physica Polonica A; 2014, 125, 2; 379-381
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Elastic Enhancement Factor: Mesoscopic Systems versus Macroscopic 2D Electromagnetic Analogue Devices
Autorzy:
Sokolov, V.
Zhirov, O.
Powiązania:
https://bibliotekanauki.pl/articles/1400563.pdf
Data publikacji:
2015-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
05.45.Gg
24.60.Lz
05.45.Mt
Opis:
Excess of probabilities of the elastic processes over the inelastic ones is a common feature of the resonance phenomena described in the framework of the random matrix theory. This effect is quantitatively characterized by the elastic enhancement factor $F^{(β)}$ that is the typical ratio of elastic and inelastic cross-sections. Being measured experimentally, this quantity can supply us with information on specific features of the dynamics of the intermediate complicated open system. We discuss properties of the enhancement factor in a wide scope from mesoscopic systems to macroscopic analogue electromagnetic resonators and demonstrate essential qualitative distinction between the elastic enhancement factor's peculiarities in these two cases. Complete analytical solution is found for the case of systems without time-reversal symmetry and only a few open equivalent scattering channels.
Źródło:
Acta Physica Polonica A; 2015, 128, 6; 990-993
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
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