Wyniki wyszukiwania - Biblioteka Nauki

1

Positioning of electromagnetic levitation device in case of levitating plate perforation

100%

Stępień S. , Kołota J.

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2009

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tom Vol. 17, nr 1

117-132

EN

This research presents a voltage control method of an electromagnetic levitation device. Finite element method is used to model the device known as Team Workshop Problem 28. Double Proportional-Integral-Derivative controller of sinusoidal voltage amplitude is applied to the levitator positioning. Both the levitation device and the controller equations are coupled and solved in the control loop. The model for solving the control problem is presented. In the numerical example a relationship between the position and the sinusoidal voltage amplitude applied on coils for given positions is determined. Also as an additional contribution an impact on perforation of the levitating plate on the device positioning is examined

2

Optimisation of neural network controller architecture in DC motor model

80%

Józefowicz K. , Kołota J. , Stepień S.

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2008

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tom Vol. 16, nr 2

81-88

EN

The past few years have witnessed a dynamic growth variety of neural network applications. Range of these applications is very wide especially in industrial process control. As in nature, the neural network is determined by the connections between the elements, and we can train its to perform the particular function by adjusting special values (weights between elements) [1,4,7]. This paper presents DC motor model controlled by neural network Proportional-Derivate controller in comparison with classic PD controller. The research concern different network architectures and training functions. The models are presented and the experimental results signals are shown using graphical charts.

3

Sprzężony model magneto-mechaniczny silnika krokowego o zmiennej reluktancji

80%

Bernat J. , Kołota J. , Stępień S.

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2009

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tom R. 85, nr 4

210-213

PL

W pracy przedstawiono metodę modelowania i symulowania reluktancyjnego silnika krokowego przy pomocy elementów skończonych. W analizie modelu uwzględniono równania magnetostatyczne sprzężone z równaniami ruchu. Problem nieliniowości został rozwiązany za pomocą metody Newtona - Raphsona z aproksymacją krzywej B-H.

EN

In this paper a method of modeling and numerical simulation of the variable reluctance stepper motor using the time stepping finite element technique is presented. In analyzed model the magnetostatic field partial differential equations are coupled with rotor motion equation and solved simultaneously in each iterative step. The nonlinearity problem is solved using Newton - Raphson method with spline approximation of the B-H curve.

4

The analysis of a stepper motor control system

80%

Kołota J. , Ober W. , Stępień S. , Stranz A.

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2007

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tom No. 7

27-36

EN

The objectives of this paper arc to present a laboratory kit for examination of the properties of a stepper motor. The paper thoroughly treats about the results of a research on proper control and functionality of the stepper motor and its power controller. Angular position, accuracy of positioning and angular velocity will be measured as determinants of correct operation in a full step and microstep setting.

5

The stepper motor control system in linear drive application

80%

Kołota J. , Stępień S. , Stranz A.

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2007

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tom No. 8

47-59

EN

The paper presents a linear drive application driven by a stepper motor. A description of the stepper motor work and control is given. The results of experiment as relationship between rotor angular velocity and input signal frequency are presented and discussed. Two cases: full-step and micro-step positioning arc examined. The measurements were made in wide frequency range (385,5 Hz-1029,3 Hz), and the results are illustrated in graphical way. This research shows advantages and disadvantages of the laboratory system as a linear drive of the stepping motor.

6

Minimising of electromagnetic torque ripple of reluctance stepper motor

80%

Bernat J. , Kołota J. , Stepień S.

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2012

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tom R. 88, nr 9a

200-203

EN

Reluctance stepper motors are commonly used in many cost-sensitive industrial and consumer applications, however they are affected by a large torque ripple, due to construction and phase unbalancing. This, in turn, may cause large vibrations on the load, especially in those systems with flexible elements. This research presents a technique of dynamics improvement by modification of voltage control signal of the variable reluctance stepper motor. The problem is solved by the electromagnetic field modeling using the time – stepping finite element method.

PL

Reluktancyjne silniki krokowe są powszechnie wykorzystywane w wielu aplikacjach przemysłowych, jednakże ze względu na specyficzną budowę i niezrównoważone zasilanie faz silnika są one narażone na duże tętnienia momentu. To z kolei może spowodować duże wibracje na obciążeniu, szczególnie w systemach z elastycznymi elementami. Artykuł prezentuje modyfikację napięcia sterującego, uwzględniając wartości indukcyjności kolejno zasilanych faz silnika. Pole elektromagnetyczne modelu zostało rozwiązane metodą elementów skończonych.

7

Suboptimal control of nonlinear continuous-time locally positive systems using input-state linearization and SDRE approach

80%

Bernat J. , Kołota J. , Stępień S. , Superczyńska P.

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8

Parallel computations of multiphase electromagnetic systems

80%

Kołota J. , Smykowski J. , Stępień S. , Szymański G.

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2007

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tom R. 83, nr 11

29-31

EN

In this paper an effective approach for parallel computations of multiphase electromagnetic systems is presented. This method is used to accelerate solving of multiphase models using socket interface algorithm. Discussed algorithm has been examined in example of 3D FE three-phase transformer.

PL

W niniejszym artykule przedstawiona została efektywna metoda na zrównoleglenie obliczeń dla wielofazowych układów elektromagnetycznych. Omówione zagadnienie zrównoleglenia obliczeń jest do stosowane w celu przyspieszenia uzyskania rozwiązań dla modeli wielofazowych stosując interfejs gniazd. Omawiany algorytm został sprawdzony na przykładzie obliczeń dla trójwymiarowego modelu transformatora trójfazowego.