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  1. 4 Vibrations in Physical Systems
  2. 2 Polish Journal of Chemical Technology
  3. 1 Annals of Computer Science and Information Systems
  4. 1 Archives of Control Sciences
  5. 1 Archives of Thermodynamics
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  1. 2 Kupecki J.
  2. 2 Michalak B.
  3. 2 Milewski J.
  4. 1 Ali S. S.
  5. 1 Asif M.
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  1. 1 2021
  2. 1 2018
  3. 2 2017
  4. 2 2016
  5. 1 2015
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1
Content available remote Towards energy-aware cyber-physical systems verification and optimization
Soltani Reza, Kang Eun-Young, Heredia Mena Juan Esteban
Annals of Computer Science and Information Systems
|
2021
|
Vol. 26
205--210
EN
Optimizing CPS behavior in terms of energy consumption can have a significant impact on system reliability. The environment influences the system's behavior, and neglecting the environmental behavior has indirect negative impact on optimizing the system's behavior. In this work, to increase the system's flexibility, the behavior of the environment is modeled dynamically to apply the disorderliness of its behavior. The resulting models are formally verified. By examining the past environmental behavior and predicting its future behavior, energy optimization is done more dynamically. The verification results acquired using a UPPAAL-SMC show that the optimization of system behavior by predicting the environmental behavior has been successful. Our approach is demonstrated using a case study within an I4 setting.
2
Content available Problems of modelling of ITS services in transportation models
Karoń G., Mikulski J.
Archives of Transport System Telematics
|
2018
|
Vol. 11, iss. 3
30--34
EN
Paper presents important issues related to macroscopic/strategic transportation modelling for ITS projects – utility function and perceived travel time for mode choice in macroscopic model.
3
Content available Dynamic modeling of the isoamyl acetate reactive distillation process
Ali S. S., Hossain SK. S., Asif M.
Polish Journal of Chemical Technology
|
2017
|
Vol. 19, nr 1
59--66
EN
The cost-effectiveness of reactive distillation (RD) processes makes them highly attractive for industrial applications. However, their preliminary design and subsequent scale-up and operation are challenging. Specifically, the response of RD system during fluctuations in process parameters is of paramount importance to ensure the stability of the whole process. As a result of carrying out simulations using Aspen Plus, it is shown that the RD process for isoamyl acetate production was much more economical than conventional reactor distillation configuration under optimized process conditions due to lower utilities consumption, higher conversion and smaller sizes of condenser and reboiler. Rigorous dynamic modeling of RD system was performed to evaluate its sensitivity to disturbances in critical process parameters; the product flow was quite sensitive to disturbances. Even more sensitive was product composition when the disturbance in heat duties of condenser or reboiler led to a temperature decrease. However, positive disturbance in alcohol feed is of particular concern, which clearly made the system unstable.
4
Content available Computational fluid dynamics analysis of an innovative start-up method of high temperature fuel cells using dynamic 3d model
Kupecki J., Mich D., Motylinski K.
Polish Journal of Chemical Technology
|
2017
|
Vol. 19, nr 1
67--73
EN
The article presents a numerical analysis of an innovative method for starting systems based on high temperature fuel cells. The possibility of preheating the fuel cell stacks from the cold state to the nominal working conditions encounters several limitations related to heat transfer and stability of materials. The lack of rapid and safe startup methods limits the proliferation of MCFCs and SOFCs. For that reason, an innovative method was developed and verified using the numerical analysis presented in the paper. A dynamic 3D model was developed that enables thermo-fluidic investigations and determination of measures for shortening the preheating time of the high temperature fuel cell stacks. The model was implemented in ANSYS Fluent computational fluid dynamic (CFD) software and was used for verifi cation of the proposed start-up method. The SOFC was chosen as a reference fuel cell technology for the study. Results obtained from the study are presented and discussed.
5
Content available Dynamic Modeling of Planetary Vehicle’s Fall on Soft Soil
Shibly H.
Journal of Automation Mobile Robotics and Intelligent Systems
|
2016
|
Vol. 10, No. 3
22--28
EN
The objective of future planetary mission is to explore more new zones on Mars planet. This goal may be achieved by using high speed planetary vehicle, (Rover). The motion of planetary vehicles at high speed and on unknown terrain increases the number of possible risks. One risk is a sudden change of ground level in the vehicle path causes a fall down onto a low ground. This paper presents a study and simulation of the dynamic response of a free fall of a quarter vehicle (rover) model with rigid wheel on a soft soil. A simplification of Bekker’s equation is derived and used in the numerical solution of the two coupled dynamic equations of motion. The Dynamic response of the unsprung mass, rigid wheel, shows a three stages; the sinkage stage, the equilibrium stage, and the pulling out stage from soil. The simulation shows that having rigid body mode helps in pulling out the vehicle wheel from the soil. It shows that the first three stages of the first fall are the most significant ones. They have the largest sinkage, largest impulsive force, and largest amplitude of the system dynamic response during interaction of the rigid wheel and the soft soil following the free fall. The existence of a damping reduces the dynamic response magnitude and prevent the unsprung mass from pulling out the wheel from soil after sinkage.
6
Content available Badanie numeryczne materiału przeciwwstrząsowego na podstawie próby swobodnego spadku opakowania
Osowski P., Piątkowski T.
Autobusy : technika, eksploatacja, systemy transportowe
|
2016
|
R. 17, nr 6
1469--1472
PL
Artykuł dotyczy modelowania właściwości dynamicznych elementów przeciwwstrząsowych opakowania w środowisku LS-DYNA. Zaproponowano metodę wyznaczenia charakterystyki dynamicznego ściskania materiału niejednorodnego na podstawie próby swobodnego spadku z zadanej wysokości. Wyniki badań numerycznych i doświadczalnych są zadowalająco zgodne. Zachęcają do dalszego rozwijania metody opisu właściwości dynamicznych materiałów przeciwwstrząsowych, ukierunkowanej na minimalizację nakładu badań doświadczalnych.
EN
The paper concerns the dynamic properties modeling of package cushioning elements in LS-DYNA environment. The method to determine the dynamic compression characteristic of heterogenic material with the use of the free fall test from height was proposed. The numerical results and experimental ones are acceptably congruent. They encourage to further method development to determine the dynamic properties of cushion materials, focused on minimization of experimental research time and cost.
7
Content available Analysis of nodalization effects on the prediction error of generalized finite element method used for dynamic modeling of hot water storage tank
Wołowicz M., Kupecki J., Wawryniuk K., Milewski J., Motyliński K.
Archives of Thermodynamics
|
2015
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Vol. 36, no. 3
123--138
EN
The paper presents dynamic model of hot water storage tank. The literature review has been made. Analysis of effects of nodalization on the prediction error of generalized finite element method (GFEM) is provided. The model takes into account eleven various parameters, such as: flue gases volumetric flow rate to the spiral, inlet water temperature, outlet water flow rate, etc. Boiler is also described by sizing parameters, nozzle parameters and heat loss including ambient temperature. The model has been validated on existing data. Adequate laboratory experiments were provided. The comparison between 1-, 5-, 10- and 50-zone boiler is presented. Comparison between experiment and simulations for different zone numbers of the boiler model is presented on the plots. The reason of differences between experiment and simulation is explained.
8
Content available An innovative method for stress analysis of Y25 bogie under oscillating loads due to tank wagon fluid sloshing
Rezvani M. A., Feizi M. M., Shadfar M
Journal of Theoretical and Applied Mechanics
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2014
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Vol. 52 nr 3
745--755
EN
Freight wagons carry higher axle loads and may travel along tracks of lower quality. This can be interpreted as higher dynamic loading of freight bogies especially for tanker cars that are subjected to sloshing loading. Rail irregularities, particularly during braking and running on curved tracks initiate the fluid sloshing. This article is about introducing an innovative method for analyzing bogie stresses of tanker cars while in travel and under critical circumstances. The effect of the vehicle speed of travel, its liquid filling ratio, track quality and fluid density are also investigated in terms of stress results of bogies.
9
Content available Solution of the Kalman filtering problem in control and modeling of a double inverted pendulum with rolling friction
Olejnik P., Awrejcewicz J., Niełaczny M.
Pomiary Automatyka Robotyka
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2013
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R. 17, nr 1
63-70
EN
The problem of control and dynamical modeling of a unicycle-cyclist system treated as a double inverted pendulum with rolling friction and vibrating in the plane that is perpendicular to the direction of movement is studied. The object of analysis consists of two basic parts: the wheel and the double pendulum. The equations of motion have been derived using the Lagrange equation of the second kind. The kinematic excitation has been applied to the cyclist. The aim of control is to maintain the unicyclecyclist system in an unstable equilibrium around given angular position. Control moment of force has been applied to the wheel in a numerical procedure performed in Simulink. Kalman filtering problem has been solved basing on the feedback control system and functions included in Control System Toolbox of MATLAB. The proposed approach could be extended in future to solve some dynamical problem of transverse vibrations.
PL
Praca podejmuje rozwiązanie zagadnienia kontroli i modelowania dynamicznego układu monocykl-rowerzysta rozpatrzonego jako podwójne wahadło odwrócone z tarciem tocznym drgające w płaszczyźnie prostopadłej do kierunku ruchu. Analizowany obiekt składa się z dwóch podstawowych części, tzn. koła i podwójnego wahadła. Równania ruchu układu mechanicznego, w którym wymuszenie kinematyczne przyłożono do masy reprezentującej ciało rowerzysty wyprowadzono stosując równania Lagrange’a drugiego rodzaju. Zadaniem kontroli było utrzymanie modelu układu monocykl-rowerzysta w niestabilnym położeniu równowagi w pobliżu zadanej wartości kąta obrotu. W procedurze numerycznej zrealizowanej w Simulinku moment siły kontroli przyłożono do koła napędzającego układ modelowy. Zagadnienie doboru filtru Kalmana rozwiązano w układzie sterowania ze sprzężeniem zwrotnym przy użyciu wbudowanych funkcji numerycznych wchodzących w skład biblioteki Control System Toolbox pakietu MATLAB. Zaproponowane podejście można rozszerzyć w przyszłości w celu rozwiązania podobnego problemu dynamicznego uwzględniającego drgania poprzeczne.
10
Metody tworzenia modeli dynamiki mobilnych robotów kołowych
Trojnacki M.
Modelowanie Inżynierskie
|
2013
|
T. 17, nr 48
150--161
PL
W pracy zaprezentowano stosowane w literaturze metody tworzenia modeli dynamiki mobilnych robotów kołowych. Omówiono zalety, wady i ograniczenia poszczególnych metod oraz problemy związane z modelowaniem dynamiki takich układów. Opisano autorską, uniwersalną metodykę tworzenia modelu dynamiki dla mobilnych robotów kołowych opartą na formalizmie Newtona-Eulera. Opracowana metodyka umożliwia kompleksowe podejście do modelowania dynamiki mobilnych robotów kołowych, pozwalając na opracowanie modeli dynamiki dla dowolnej liczby kół stykających się z podłożem i na uwzględnienie w modelu występowania poślizgów kół jezdnych.
EN
In this paper, the methods of development of dynamics models of wheeled mobile robots are presented. Advantages, drawbacks and limitations of particular methods as well as problems associated with modeling of dynamics of such systems are discussed. The original universal methodology of development of the analytical dynamics model of wheeled mobile robots based on Newton-Euler formalism is described. It enables a comprehensive approach to modeling of dynamics of wheeled robots by providing means to develop models for any number of wheels being in contact with the ground and by taking into account the occurrence of wheels’ slips.
11
Content available Mоделирование дизельного двигателя в исследованиях динамики машинных тракторных агрегатов
Tajanovsky G. A., Atamanov J. E., Tanaś W.
Journal of Research and Applications in Agricultural Engineering
|
2013
|
Vol. 58, nr 1
178--184
EN
In article the mathematical description of diesel engines of machine tractor units of different function in researches of their dynamics is stated by working out of new technics. In article methodical positions of modeling of diesel engines in various problems of dynamics of tractor units are considered. Developed variants of mathematical descriptions of the diesel engine are presented, and the variant choice is defined by problems of concrete research of dynamics of the machine tractor unit.
RU
В статье изложено математическое описание дизельных двигателей машинных тракторных агрегатов различного назначения в исследованиях их динамики при разработке новой техники. В статье рассмотрены методические положения моделирования дизельных двигателей в различных задачах динамики тракторных агрегатов. В публикации представлены разработанные варианты математических описаний дизельного двигателя. Выбор варианта определяется задачами конкретного исследования динамики машинного тракторного агрегата.
12
Content available Backstepping sliding mode controller improved with fuzzy logic: Application to the quadrotor helicopter
Zeghlache S., Saigaa D., Harrag A., Kara K., Bouguerra A.
Archives of Control Sciences
|
2012
|
Vol. 22, no. 3
315-342
EN
n this paper we present a new design method for the fight control of an autonomous quadrotor helicopter based on fuzzy sliding mode control using backstepping approach. Due to the underactuated property of the quadrotor helicopter, the controller can move three positions (x;y; z) of the helicopter and the yaw angle to their desired values and stabilize the pitch and roll angles. A first-order nonlinear sliding surface is obtained using the backstepping technique, on which the developed sliding mode controller is based. Mathematical development for the stability and convergence of the system is presented. The main purpose is to eliminate the chattering phenomenon. Thus we have used a fuzzy logic control to generate the hitting control signal. The performances of the nonlinear control method are evaluated by simulation and the results demonstrate the effectiveness of the proposed control strategy for the quadrotor helicopter in vertical flights.
13
Content available remote Comparative analysis of time constants in Solid Oxide Fuel Cell processes - selection of key processes for modeling power systems
Milewski J., Lewandowski J.
Journal of Power Technologies
|
2011
|
Vol. 91, nr 1
1-5
EN
The article presents a comparative analysis of the time constants of the main processes in the SOFC. The analysis was used to determine those processes most relevant to the modeling of an energy system comprising a fuel cell. The hybrid system, in addition to the fuel cell, has other devices (such as compressors, turbines, heat exchangers, etc.) working with it that may limit permissible ranges of parameter changes during transient processes. On the other hand, fuel cells affect other devices making up the system, including by restricting their operation in terms of dynamic responses. Determination of time constants of the main processes in the cell and their analysis and comparison with time constants of other devices will allow selection of the most important processes from modeling point of vies and simplify the dynamic fuel cell model, so the class of fuel cell will match classes of models of other system elements.
14
Content available Modelowanie sztywności koła podatnego przekładni falowej
Folęga P., Wojnar G.
Zeszyty Naukowe. Transport / Politechnika Śląska
|
2010
|
z. 67
39-44
PL
W artykule omówiono niektóre aspekty modelowania dynamicznego przekładni falowej. W szczególności zaproponowano nowy, oryginalny model dynamiczny przekładni falowej w układzie napędowym. W modelu uwzględniono nieliniowe zmiany sztywności i tłumienia.
EN
In the paper some aspects of harmonic drive gear modeling of dynamic are consider. At particular of the propose a new original dynamic model of harmonic drive gear in power trans-mission system. In the model we take into consideration a nonlinear stiffness and damping.
15
Introduction to dynamic modeling of rack stackers for high-bay warehouse
Hajdu S., Tiba Z.
Zeszyty Naukowe Politechniki Poznańskiej. Budowa Maszyn i Zarządzanie Produkcją
|
2009
|
Nr 10
15-23
EN
Results of this paper indicated that there are many ways of modelling the planar vibration of single mast rack stacker machines, which approximate features of a real structure with different accuracy. These models are usable well for control examinations and for linear control design. However, by the determination of the model, besides the accuracy, the model shouldn't be too complicated and calculation demanding.
16
Content available remote A Contribution to the Modelling of Dynamic Behaviour for Composites Plates with Non-uniform Distribution of Constituents
Michalak B.
Vibrations in Physical Systems
|
2004
|
Vol. 21
267--270
17
Content available remote Dynamiczne zachowanie się periodycznej płyty tarczownicowej
Michalak B.
Vibrations in Physical Systems
|
2000
|
Vol. 19
211--212
18
Content available remote Dynamiczne modele mikroperiodycznych ośrodków piezoelektrycznych
Woźniak M., Pauk R.
Vibrations in Physical Systems
|
2000
|
Vol. 19
301--302
19
Content available remote Dynamiczne modele dwuparametrowe sprężystego klina
Marzęda J., Pauk W.
Vibrations in Physical Systems
|
2000
|
Vol. 19
209--210
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