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Wyświetlanie 1-15 z 21
Tytuł:
P1-TS fuzzy scheduling control system design using local pole placement and interval analysis
Autorzy:
Smoczek, J.
Powiązania:
https://bibliotekanauki.pl/articles/199816.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
P1-TS fuzzy system
scheduling control
LPV discrete-time system
local pole placement
interval analysis
Opis:
The linear parameter-varying (LPV) discrete-time model based design of a fuzzy scheduling control scheme is developed through incorporating the advantages of P1-TS theory, and applying the local pole placement method and interval analysis of closed-loop system polynomial coefficients. The synthesis of fuzzy scheduling control scheme is proposed in the form of iterative procedure, which enables to find the appropriate number of intervals of a fuzzy interpolator ensuring that a family of local linear controllers places closed-loop polynomial coefficients within a desired range. The computational complexity of multidimensional fuzzy scheduling control scheme synthesis is reduced using a fundamental matrix method and recursive procedure for fuzzy rule-based interpretation. The usability of the proposed method is illustrated by an implementation example and experimental results obtained on a laboratory scaled overhead crane.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2014, 62, 3; 455-464
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design of H∞ proportional-integral thrust controller for ramjet engine
Autorzy:
Zorić, Nemanja Dušan
Radulović, Radoslav Danilo
Jazarević, Vladimir Miloš
Petrović, Trajko Borivoje
Powiązania:
https://bibliotekanauki.pl/articles/1839621.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
ramjetH∞ control
proportional-integral control
gain scheduling
Opis:
This paper presents the design of a thrust controller for a ramjet engine. The mathematical model for controller synthesis is based on a numerical solution of a set of nonlinear equations. Transfer functions of the engine are found for certain operation points defined by the altitude, Mach number and angle of attack. Local controllers are developed by using H∞ control methodology, finally reduced to proportional-integral (PI) controllers. For gain scheduling, linear interpolation of parameters of the local PI controllers is used. Next, simulations are performed in order to show performances of the presented control algorithm.
Źródło:
Journal of Theoretical and Applied Mechanics; 2020, 58, 4; 997-1007
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Scheduling production orders, taking into account delays and waste
Autorzy:
Dylewski, R.
Jardzioch, A.
Powiązania:
https://bibliotekanauki.pl/articles/407419.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
flexible manufacturing systems
production control
scheduling algorithms
Opis:
The article addresses the problem of determining the sequence of entering orders for production in a flexible manufacturing system implementing technological operations of cutting sheet metal. Adopting a specific ranking of production orders gives rise to the vector of delays and waste in the form of incompletely used sheets. A new method was postulated for determining the optimal sequence of orders in terms of two criteria: the total cost of delays and the amount of production waste. The examples illustrate the advantages of the proposed method compared with the popular heuristic principles.
Źródło:
Management and Production Engineering Review; 2014, 5, 3; 3-8
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Active Noise-Vibration Control using the Filtered-Reference LMS Algorithm with Compensation of Vibrating Plate Temperature Variation
Autorzy:
Mazur, K.
Pawełczyk, M.
Powiązania:
https://bibliotekanauki.pl/articles/177469.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
active noise-vibration control
active structural acoustic control
adaptive control
gain scheduling
temperature influence
Opis:
Vibrating plates have been recently used for a number of active noise control applications. They are resistant to difficult environmental conditions including dust, humidity, and even precipitation. However, their properties significantly depend on temperature. The plate temperature changes, caused by ambient temperature changes or plate heating due to internal friction, result in varying response of the plate, and may make it significantly different than response of a fixed model. Such mismatch may deteriorate performance of an active noise control system or even lead to divergence of a model-based adaptation algorithm. In this paper effects of vibrating plate temperature variation on a feedforward adaptive active noise reduction system with the multichannel Filtered-reference LMS algorithm are examined. For that purpose, a thin aluminum plate is excited with multiple Macro-Fiber Composite actuators. The plate temperature is forced by a set of Peltier cells, what allows for both cooling and heating the plate. The noise is generated at one side of the plate, and a major part of it is transmitted through the plate. The goal of the control system is to reduce sound pressure level at a specified area on the other side of the plate. To guarantee successful operation of the control system in face of plate temperature variation, a gain-scheduling scheme is proposed to support the Filteredreference LMS algorithm.
Źródło:
Archives of Acoustics; 2011, 36, 1; 65-76
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Automated guided vehicles : the survey
Autorzy:
Hyla, P.
Szpytko, J.
Powiązania:
https://bibliotekanauki.pl/articles/950145.pdf
Data publikacji:
2017
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
AGV
navigation
patch planning
scheduling
workspace mapping
control
telematics
Opis:
Transport has always been a fundamental impulse for the development of civilization. The first fully automatically controlled vehicles for industrial application (previously called driverless vehicles) was design in 1954 year. This has been achieved more than 60 years ago. Unmanned Ground Vehicles are a whole family of autonomous vehicles use modern tools with all power today available electronics for navigation task and decision making process on the base artificial intelligence and (AI) algorithms. At present time a problem of the realization a fully reconfiguration navigation system working in real time mode for UGV vehicles is the subject of the research for many scientific units of the entire scientific world. The object of the statement constitute AGV short historical outline with actual trends marking. The special authors' attention was focused on the solutions dedicated for so-called e-tools functionalities implementing in modern AGV vehicles. The main purpose of the article was focused on the set of issues involving the most problems in the whole material handling (MHD) family devices with any autonomous factor. The article is focused on the localization problem, trajectories founding, path planning, scheduling, workspace with environment mapping and AGV control issues. Described methods and tools are connected with chosen artificial intelligence solutions dedicated or adapted for autonomous vehicles' needs.
Źródło:
Journal of KONES; 2017, 24, 3; 101-110
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new elastic scheduling task model in the node of a control and measurement system
Autorzy:
Miczulski, W.
Powroźnik, P.
Powiązania:
https://bibliotekanauki.pl/articles/220884.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
task scheduling
elastic scheduling task model
heuristic algorithms
measurement and control systems
time deadline fulfilment
Opis:
The paper presents a new elastic scheduling task model which has been used in the uniprocessor node of a control measuring system. This model allows the selection of a new set of periods for the occurrence of tasks executed in the node of a system in the case when it is necessary to perform additional aperiodic tasks or there is a need to change the time parameters of existing tasks. Selection of periods is performed by heuristic algorithms. This paper presents the results of the experimental use of an elastic scheduling model with a GRASP heuristic algorithm.
Źródło:
Metrology and Measurement Systems; 2013, 20, 1; 87-98
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fast Data Collection in Tree-Based Wireless Sensor Networks
Autorzy:
Parashiva Murthy, B. M.
Tanuja, K.
Rakshitha, M.
Supretha, S.
Powiązania:
https://bibliotekanauki.pl/articles/1193576.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Convergecast
TDMA scheduling
multiple channels
power-control
routing trees
Opis:
The below work is done to address the things like how fast can information be collected from a wireless sensor network organized as tree using realistic simulation models under the many-to-one communication paradigm known as converge cast. We first consider time scheduling on a single frequency channel with the aim of minimizing the number of time slots required to complete a converge cast. Next, we combine scheduling with transmission power control to mitigate the effects of interference, and show that while power control helps in reducing the schedule length under a single frequency, scheduling transmissions using multiple frequencies is more efficient. To this end, we construct degree-constrained spanning trees and capacitated minimal spanning trees, and show significant improvement in scheduling performance over different deployment densities. Lastly, we evaluate the impact of different interference and channel models on the schedule length.
Źródło:
World Scientific News; 2016, 41; 230-238
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Using Pre-emption For Dependable Urban Vehicle Traffic
Autorzy:
Letia, T.
Barbu, S.
Dinga, F.
Powiązania:
https://bibliotekanauki.pl/articles/384863.pdf
Data publikacji:
2009
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
urban vehicle traffic control
real time scheduling
traffic congestion
real time control
dependability
Opis:
A new approach for design and implementation of urban vehicle control system is proposed. The vehicle streams on lanes are considered similar with the streams of instructions in multitask programs. Real-time scheduling algorithms are used to allocate the green lights to phases. An adaptive component is used to calculate new vehicle flow parameters when a failure appears as a consequence of an accident. The real-time schedulers use the parameters to obtain new feasible resource allocations.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2009, 3, 1; 40-45
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Teoria szeregowania zadań w analizie dotrzymania ograniczeń czasowych w systemach pomiarowo-sterujących
Task scheduling theory in time deadline analysis of measurement-control systems
Autorzy:
Michta, E.
Powiązania:
https://bibliotekanauki.pl/articles/152898.pdf
Data publikacji:
2007
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
systemy pomiarowo-sterujące
szeregowanie zadań
measurement-control systems
task scheduling
Opis:
W artykule zarysowano elementy teorii szeregowania zadań, które mogą być przydatne do analizy dotrzymania ograniczeń czasowych w systemach pomiarowo-sterujących. Zaprezentowano trzy metody szeregowania zadać ze statycznym i dynamicznym przydziałem priorytetu. Przedstawiono podstawowe zależności do sprawdzenia warunku realizowalności zadań w projektowanym systemie dla szeregowania zadań metodami RM, DM i EDF.
In this paper essentials of task scheduling theory, which can be helpful to time deadline analysis in measurement-control systems are outlined. Three task scheduling methods with static and dynamic priority assignment are presented. Basic relations to task utilization condition testing in system being design for task scheduling based on RM, DM and EDF methods are presented.
Źródło:
Pomiary Automatyka Kontrola; 2007, R. 53, nr 5, 5; 81-83
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The optimal sequence of production orders, taking into account the cost of delays
Autorzy:
Dylewski, R.
Jardzioch, A.
Krebs, I.
Powiązania:
https://bibliotekanauki.pl/articles/407417.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
scheduling algorithms
production control
minimum cost
delays
single-machine processing
Opis:
In flexible manufacturing systems the most important element in determining the proper course of technological processes, transport and storage is the control and planning subsystem. The key planning task is to determine the optimal sequence of production orders. This paper proposes a new method of determining the optimal sequence of production orders in view of the sum of the costs related to the delayed execution of orders. It takes into account the different unit costs of delays of individual orders and the amount of allowable delays of orders involving no delay costs. The optimum sequence of orders, in the single-machine problem, in view of the sum of the costs of delays may be significantly different from the optimal order, taking into account the sum of delay times.
Źródło:
Management and Production Engineering Review; 2016, 7, 2; 21-28
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nadążne sterowanie produkcją jako metoda harmonogramowania produkcji powtarzalnej
The Follow-up Production Control as a Method of Repetetive Production Control
Autorzy:
Krystek, J.
Zaborowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/156847.pdf
Data publikacji:
2007
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
sterowanie produkcją
harmonogramowanie
produkcja powtarzalna
production control
scheduling
repetitive production
Opis:
W artykule przedstawiono metodę nadążnego sterowania produkcją, którą można wykorzystać do harmonogramowania procesów produkcji powtarzalnej. Omówiono krótko algorytm nadążnego harmonogramowanie produkcji, który jest przeznaczony do bieżącej generacji planów wykonawczych danej komórki systemu produkcyjnego, w taki sposób, by nadążały one za operacyjnymi planami produkcji pochodzącymi z jednostki koordynacyjnej systemu. Celem badań było sprawdzenie wpływu reguł priorytetu, stosowanych do wyboru wariantów produkcyjnych, na czas trwania stanów nieustalonych i na właściwości cyklogramów produkcji rytmicznej generowanych przez algorytm w stanach ustalonych.
In the paper the follow-up production control is presented as a method of repetitive production scheduling. A short description of the follow-up scheduling algorithm is given. The follow-up scheduling algorithm is designed to current generation of work cell executive plans which follow operational production plans coming from coordination unit. The simulation research goal was to verify if dispatch rules, that are applied to production variants selection, influence on duration of transient state and on features of cyclic schedules generated by the algorithm in steady-state.
Źródło:
Pomiary Automatyka Kontrola; 2007, R. 53, nr 8, 8; 33-37
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Scheduling of the Manufacturing Cell Work with the Use of a Genetic Algorithm on the Example of a Flexible Production System
Autorzy:
Matuszny, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/2201163.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
production planning
production control
production scheduling
genetic algorithm
production engineering
production process
Opis:
The article is to present the application of genetic algorithm in production scheduling in a production company. In the research work the assumptions of the methodology were described and the operation of the proposed genetic algorithm was presented in details. Genetic algorithms are useful in complex large scale combinatorial optimisation tasks and in the engineering tasks with numerous limitations in the production engineering. Moreover, they are more reliable than the existing direct search algorithms. The research is focused on the effectivity improvement and on the methodology of scheduling of a manufacturing cell work. The genetic algorithm used in the work appeared to be robust and fast in finding accurate solutions. It was shown by experiment that using this method enables obtaining schedules suitable for a model. It gives a group of solutions that are at least as good as those created by the heuristic rules.
Źródło:
Management and Production Engineering Review; 2022, 13, 4; 98--106
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reducing the mast vibration of single-mast stacker cranes by gain-scheduled control
Autorzy:
Hajdu, S.
Gáspár, P.
Powiązania:
https://bibliotekanauki.pl/articles/331336.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
robust control
LPV systems
gain scheduling
stacker cranes
sterowanie odporne
szeregowanie zadań
układnica
Opis:
In the frame structure of stacker cranes harmful mast vibrations may appear due to the inertial forces of acceleration or the braking movement phase. This effect may reduce the stability and positioning accuracy of these machines. Unfortunately, their dynamic properties also vary with the lifted load magnitude and position. The purpose of the paper is to present a controller design method which can handle the effect of a varying lifted load magnitude and position in a dynamic model and at the same time reveals good reference signal tracking and mast vibration reducing properties. A controller design case study is presented step by step from dynamic modeling through to the validation of the resulting controller. In the paper the dynamic modeling possibilities of single-mast stacker cranes are summarized. The handling of varying dynamical behavior is realized via the polytopic LPV modeling approach. Based on this modeling technique, a gain-scheduled controller design method is proposed, which is suitable for achieving the goals set. Finally, controller validation is presented by means of time domain simulations.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2016, 26, 4; 791-802
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fuzzy logic gain scheduling for non-linear servo tracking
Autorzy:
Brdyś, M. A.
Littler, J. J.
Powiązania:
https://bibliotekanauki.pl/articles/908000.pdf
Data publikacji:
2002
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
elektrotechnika
tracking
servo control
gain scheduling
fuzzy logic
stiction friction
hard non-linearities
Opis:
This paper proposes the use of gain scheduling as a method of controlling a servo system with hard non-linear elements. The servo controls two elements of a tracker mounted on a ship at sea. There is stiction at the zero velocity point and non-linear friction against the motion of each tracker axis. A dual feedback loop control structure is employed. Fuzzy logic is used to provide smoothly varying non-linear scheduling functions to map the velocity of the servo relevant to the deck of the ship onto the rate loop controller parameters. Consideration is given to the use of a derivative signal as a secondary input to the fuzzy inference system. Results are presented which demonstrate that this method of controlling the servo system gives a dramatic improvement over the traditional linear control methodology for low velocity tracking performance. A linear PID controller is used in the outer loop and its design is also given some consideration.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2002, 12, 2; 209-219
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Task scheduling algorithms for multi robot environment
Algorytmy planowania zadań w środowisku wielu robotów
Autorzy:
Śmigiel, S.
Zungor, F.
Purtul, H.
Inaloz, I.
Powiązania:
https://bibliotekanauki.pl/articles/389820.pdf
Data publikacji:
2014
Wydawca:
Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydawnictwo PB
Tematy:
task scheduling
robot control algorithm
multi-agent system
warehouse
planowanie zadań
algorytmy sterowania robotami
systemy wieloagentowe
magazyn
Opis:
In recent years, the problem of multi robot task allocation and scheduling is the subject of many research activities. The key of this problem is to allocate proper number of tasks for each robot and schedule the optimal task sequence for each robot. In order to minimize the processing time for robots, were designed algorithms of the sample task scheduling. Determination of the optimal path for robots, taking into account the process of task scheduling, may be an effective strategy to manage and control of tasks in a environment. This paper presents the management and control works of robots in the logistics environment (warehouse), which will be realized by the soft real time systems. The aim of the authors was to develop and compare the optimal algorithms management works systems of multi-robot in warehouse, in terms of number of customer served and consumption energy. To validate the effectiveness of the proposed approach and simulation have been made. The results show that the proposed approach can be an effective approach in the design of optimized multi robots task allocation and scheduling scheme, especially for the Queued Task Algorithm, with 1-element queueCapacity and Nearest Task Algorithm.
Na przestrzeni ostatnich lat problem poprawnego harmonogramowania zadań, w środowisku wielu robotów, stał się przedmiotem wielu prac badawczych. Kluczem do tego problemu jest przydzielenie odpowiedniej ilości zadań do zrealizowania dla każdego robota oraz zaplanowanie optymalnej sekwencji ich wykonania. W celu minimalizacji czasu dostarczenia zasobu do punktu docelowego, zaprojektowano algorytmy planowania zadań. Proces ustalenia optymalnej ścieżki dla robota, biorąc pod uwagę sposób doręczenia zasobu, stał się dobrą strategią do zarządzania pracą robotów w wielu środowiskach. Przedstawione w niniejszym artykule algorytmy dotyczą procesu zarządzania i kontroli działań wykonywanych w środowisku logistycznym (magazyn), oparte na systemach miękkich czasu rzeczywistego. Celem autorów było opracowanie i porównanie algorytmów zarządzania w środowisku wielu robotów, pod względem liczby obsłużonych klientów oraz ilości zużytej energii na jej wykonanie. Aby potwierdzić skuteczność proponowanego podejścia, stworzono środowisko na którym przeprowadzono symulacje. Uzyskane wyniki wskazują, że proponowane podejście jest prawidłową drogą do uzyskania optymalizacji w planowaniu zadań i sekwencji ich wykonania, zwłaszcza dla algorytmu Queued Task Algorithm i Nearest Task Algorithm.
Źródło:
Zeszyty Naukowe. Telekomunikacja i Elektronika / Uniwersytet Technologiczno-Przyrodniczy w Bydgoszczy; 2014, 18; 33-45
1899-0088
Pojawia się w:
Zeszyty Naukowe. Telekomunikacja i Elektronika / Uniwersytet Technologiczno-Przyrodniczy w Bydgoszczy
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 21

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