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Tytuł:
Mechanizmy typu fault tolerance w multimedialnym systemie konferencyjnym STIAR
Autorzy:
Suski, Z.
Sulej, W.
Powiązania:
https://bibliotekanauki.pl/articles/273206.pdf
Data publikacji:
2000
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:
STIAR
fault tolerance
system konferencyjny
Opis:
W artykule przedstawiono wyniki prac nad podsystemem diagnostyki i rekonfiguracji multimedialnego systemu telekonferencyjnego STIAR. Przedstawiono podstawowe dokumenty z poszczególnych faz cyklu rozwojowego. Pełna dokumentacja została zamieszczona w [2].
Źródło:
Biuletyn Instytutu Automatyki i Robotyki; 2000, R. 6, nr 14, 14; 51-104
1427-3578
Pojawia się w:
Biuletyn Instytutu Automatyki i Robotyki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vulnerability parameters of tensor product of complete equipartite graphs
Autorzy:
Paulraja, P.
Sheeba-Agnes, V.
Powiązania:
https://bibliotekanauki.pl/articles/255883.pdf
Data publikacji:
2013
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
fault tolerance
tensor product
vulnerability parameters
Opis:
Let G1 and G2 be two simple graphs. The tensor product of G1 and G2, denoted by G1 × G2, has vertex set V (G1 × G2) = V (G1) × V (G2) and edge set E(G1 × G2) ={(u1, v1)(u2, v2) : u1u2 ∈ E(G1) and v1v2 ∈ E(G2)}. In this paper, we determine vulnerability parameters such as toughness, scattering number, integrity and tenacity of the tensor product of the graphs Kr(s) × Km(n) for r ≥ 3,m ≥ 3, s ≥ 1 and n ≥ 1, where Kr(s) denotes the complete r-partite graph in which each part has s vertices. Using the results obtained here the theorems proved in [Aygul Mamut, Elkin Vumar, Vertex Vulnerability Parameters of Kronecker Products of Complete Graphs, Information Processing Letters 106 (2008), 258–262] are obtained as corollaries.
Źródło:
Opuscula Mathematica; 2013, 33, 4; 741-750
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Robust Kalman filter-based fault-tolerant integrated Baro-Inertial-GPS altimeter
Autorzy:
Contreras, Alberto Mañero
Hajiyev, Chingiz
Powiązania:
https://bibliotekanauki.pl/articles/221828.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fault tolerance
robust Kalman filtering
integrated altimeter
Opis:
As a result of the development of modern vehicles, even higher accuracy standards are demanded. As known, Inertial Navigation Systems have an intrinsic increasing error which is the main reason of using integrating navigation systems, where some other sources of measurements are utilized, such as barometric altimeter due to its high accuracy in short times of interval. Using a Robust Kalman Filter (RKF), error measurements are absorbed when a Fault Tolerant Altimeter is implemented. During simulations, in order to test the Nonlinear RKF algorithm, two kind of measurement malfunction scenarios have been taken into consideration; continuous bias and measurement noise increment. Under the light of the results, some recommendations are proposed when integrated altimeters are used.
Źródło:
Metrology and Measurement Systems; 2019, 26, 4; 673-686
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Incorporating Fault Tolerance into Component-based Architectures for Embedded Systems
Autorzy:
Lu, S.
Halang, W. A.
Powiązania:
https://bibliotekanauki.pl/articles/384865.pdf
Data publikacji:
2009
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
software engineering
software architecture
fault tolerance
component technique
Opis:
Component-based software architecture is presented to support the process of designing and developing fault-tolerant computerised control systems. To this end, we combine an idealised fault-tolerant component, the C2 architecture style and protective wrappers, and embed fault tolerance techniques into component definitions. The resulting architecture is described by normal- and abnormal-activity components aiming to support a wide range of fault tolerance features. Use of this architecture enables to reason about system dependability already from the earliest development stages on, and to customise fault tolerance strategies according to application characteristics.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2009, 3, 1; 46-51
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fault-tolerant algorithm for a mobile robot solving a maze
Autorzy:
Srebro, A.
Powiązania:
https://bibliotekanauki.pl/articles/115441.pdf
Data publikacji:
2013
Wydawca:
Fundacja na Rzecz Młodych Naukowców
Tematy:
fault tolerance
flood fill
maze solving
mobile robot
simulator
Opis:
Maze solving problem has been considered since the ancient times. In robotics community this problem is widely known from the ”All Japan Micromouse Competition”. In this paper the author has extended the maze solving problem of cases when some robot distance sensors have been damaged. A new fault-tolerant algorithm for a mobile robot solving a maze is proposed. A dedi - cated simulator has been designed and written in Java to compare several maze solving algorithms for different combination of sensors failures.
Źródło:
Challenges of Modern Technology; 2013, 4, 1; 21-29
2082-2863
2353-4419
Pojawia się w:
Challenges of Modern Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of current space phasor trajectory of the three-phase asynchronous motor with one phase open circuit fault
Badanie trajektorii przestrzennego fazora prądu silnika asynchronicznego trójfazowego przy uszkodzeniu jednej fazy
Autorzy:
Záskalický, P.
Powiązania:
https://bibliotekanauki.pl/articles/1367339.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Napędów i Maszyn Elektrycznych Komel
Tematy:
Fourier series
asynchronous motor
two-phase operation
fault tolerance
Opis:
The presented paper deals with the calculation of space phasor trajectory of the magnetization current of induction machine supplied by a converter under open-phase fault. To explore possibilities to reduce the impact of failure on the function of the machine is a winding node connected to zero point. Under open phase fault it is another possibility to improve behavior of the two-phase operation. There is still to apply a circular rotating magnetic field to the machine by imposing a 60o phase shift between the stator currents of the two supplied stator windings.
Źródło:
Maszyny Elektryczne: zeszyty problemowe; 2016, 3, 111; 147-151
0239-3646
2084-5618
Pojawia się w:
Maszyny Elektryczne: zeszyty problemowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance analysis of multi-layered clustering network using fault tolerance multipath routing protocol (MRP-FT) in a wireless sensor network (WSN)
Autorzy:
Kaur, Gagandeep
Powiązania:
https://bibliotekanauki.pl/articles/2204100.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
scalability
fault tolerance
neural networks
Boltzmann learning
wireless sensor network
Opis:
Wireless sensor networks (WSNs) are ad hoc and self-configuring networks having the possibility that any sensor node can connect or leave the network. With no central controller in WSN, wireless sensor nodes are considered responsible for data routing in the networks. The wireless sensor nodes are very small in size and have limited resources, therefore, it becomes difficult to recharge or replace the battery of the sensor nodes at far places. The present study focused on reducing the battery consumption of the sensor nodes by the deployment of the newly proposed Fault Tolerance Multipath Routing Protocol (MRP-FT) as compared with the existing Low Energy Adaptive Clustering Hierarchy (LEACH) protocol under particle swarm optimisation based fault tolerant routing (PSO-FT) technique. The proposed algorithm of MRP-FT-based on the dynamic clustering technique using Boltzmann learning of the neural network and the weights were adjusted according to the area of networks, number of nodes and rounds, the initial energy of nodes (E0), transmission energy of nodes (d
Źródło:
Operations Research and Decisions; 2023, 33, 1; 75--92
2081-8858
2391-6060
Pojawia się w:
Operations Research and Decisions
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A self-tuning fuzzy PD controller for a wheeled mobile robot operating in the presence of faults
Autorzy:
Srebro, A.
Powiązania:
https://bibliotekanauki.pl/articles/115515.pdf
Data publikacji:
2011
Wydawca:
Fundacja na Rzecz Młodych Naukowców
Tematy:
fuzzy controller
mobile robot
nonholonomic system
trajectory tracking
fault tolerance
Opis:
This paper presents a self-tuning fuzzy PD controller designed to improve a control strategy for a wheeled mobile robot. The dynamic model of a two-wheeled mobile robot was implemented in Matlab/Simulink environment. In this paper the trajectory tracking problem for a mobile robot in the presence of positioning system faults is considered in detail. Mamdani fuzzy reasoning is used to tune the value of proportional gain Kp and derivative gain Kd of a PD controller. A few simulations comparing the classical PD controller with self-tuning fuzzy PD are reported to show advantage of the designed self-tuning controller.
Źródło:
Challenges of Modern Technology; 2011, 2, 4; 11-20
2082-2863
2353-4419
Pojawia się w:
Challenges of Modern Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Embeddings of hamiltonian paths in faulty k-ary 2-cubes
Autorzy:
Wang, Shiying
Zhang, Shurong
Powiązania:
https://bibliotekanauki.pl/articles/743649.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
complex networks
path embeddings
fault-tolerance
k-ary n-cubes
Opis:
It is well known that the k-ary n-cube has been one of the most efficient interconnection networks for distributed-memory parallel systems. A k-ary n-cube is bipartite if and only if k is even. Let (X,Y) be a bipartition of a k-ary 2-cube (even integer k ≥ 4). In this paper, we prove that for any two healthy vertices u ∈ X, v ∈ Y, there exists a hamiltonian path from u to v in the faulty k-ary 2-cube with one faulty vertex in each part.
Źródło:
Discussiones Mathematicae Graph Theory; 2012, 32, 1; 47-61
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quantitative Reliability Evaluation of Silicon Carbide-Based Inverters for Multiphase Electric Drives for Electric Vehicles
Autorzy:
Morya, Ajay Kumar
Toliyat, Hamid A.
Powiązania:
https://bibliotekanauki.pl/articles/2175928.pdf
Data publikacji:
2022
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
electric vehicle
fault tolerance
Markov model
multiphase electric drive
reliability
Opis:
Reliability of power converter in the electric drivetrain of a vehicle can be a criterion for the comparison of various converter topologies, cooling system designs and control strategies. Therefore, reliability prediction is important for the design and control of vehicles. This paper presents an approach for quantitative evaluation of the reliability of converters for multiphase motor drives for electric vehicles (EVs) after considering the driving cycle. This paper provides a good background of reliability quantification so that it is easy to extend the presented approach to other applications. The models of subsystems have been selected to have excellent computational efficiency with good accuracy which is necessary for simulating long driving cycles. A simple vehicle model is used to obtain the traction motor torque demand for various points of the driving cycle. A multiphase interior permanent magnet synchronous motor has been used for traction motor. The operating voltage and currents of the motor are found using maximum torque per ampere (MTPA) control of IPMSM. The analytical loss calculation has been used to find the losses of switching devices of the converter. A thermal model of silicon carbide (SiC) MOSFET has been used to calculate junction temperature from the losses. The model developed here gives the failure rate and mean time between failures (MTBF) of switching devices of the inverter, which can be used to determine the failure rate. The model has been used to find the transition probabilities of a Markov model which can be used to quantify the reliability of converters of multiphase electric drives.
Źródło:
Power Electronics and Drives; 2022, 7, 42; 29--42
2451-0262
2543-4292
Pojawia się w:
Power Electronics and Drives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dependability in computer systems - concepts and terminology
Niezawodność w systemach komputerowych - koncepcje i terminologia
Autorzy:
Fidalgo, A.
Powiązania:
https://bibliotekanauki.pl/articles/267966.pdf
Data publikacji:
2008
Wydawca:
Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
Tematy:
niezawodność
systemy komputerowe
tolerancja na uszkodzenia
dependability
computer systems
fault tolerance
Opis:
Dependability is a key issue in modern computer systems, particularly when dealing with critical systems. All related concepts should be clearly defined and applied, including their attributes, components and threats. It is also necessary to differentiate between faults, errors and failures and also between the various techniques to handle such hazards. Additionally, concepts like verification or validation must also be clearly differentiated.
W artykule podano precyzyjną klasyfikację, koncepcje i przyjętą terminologię pojęć związanych bezpieczeństwem niezawodnością i bezpieczeństwem w systemach komputerowych. Zwrócono uwagę na atrybuty niezawodności oraz rodzaje propagacji uszkodzeń. W trybach awaryjnych systemu określono metody przeciwdziałania, zwracając uwagę na weryfikację tych metod. Jako szczególny tryb weryfikacji niezawodności systemu komputerowego wyróżniono testy iniekcji uszkodzeń.
Źródło:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2008, 25; 37-40
1425-5766
2353-1290
Pojawia się w:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Układy napędowe odporne na wybrane uszkodzenia – stan zagadnienia
Fault tolerant motor drives – review of methods
Autorzy:
Klimkowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/1813999.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
silnik indukcyjny
napęd elektryczny
fault tolerance
FTC
czujniki pomiarowe
detekcja uszkodzeń
Opis:
In this paper the diagnostic methods used to detect failures in the drive systems with induction motors are described. Compensation techniques of electric motor drives components failures are presented. Advantages and disadvantages of commonly used methods are described. Additionally, diagnostic systems that can be successfully used in the studies of failures to the current and angular velocity sensors are described.
Źródło:
Prace Naukowe Instytutu Maszyn, Napędów i Pomiarów Elektrycznych Politechniki Wrocławskiej. Studia i Materiały; 2014, 70, 34; 133--143
1733-0718
Pojawia się w:
Prace Naukowe Instytutu Maszyn, Napędów i Pomiarów Elektrycznych Politechniki Wrocławskiej. Studia i Materiały
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bayesian Network Based Fault Tolerance in Distributed Sensor Networks
Autorzy:
Lokesh, B. B.
Nalini, N.
Powiązania:
https://bibliotekanauki.pl/articles/308287.pdf
Data publikacji:
2014
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
Bayesian network
distributed sensor networks
fault detection
fault tolerance
fault recovery
network control
routing
Opis:
A Distributed Sensor Network (DSN) consists of a set of sensors that are interconnected by a communication network. DSN is capable of acquiring and processing signals, communicating, and performing simple computational tasks. Such sensors can detect and collect data concerning any sign of node failure, earthquakes, floods and even a terrorist attack. Energy efficiency and fault-tolerance network control are the most important issues in the development of DSNs. In this work, two methods of fault tolerance are proposed: fault detection and recovery to achieve fault tolerance using Bayesian Networks (BNs). Bayesian Network is used to aid reasoning and decision making under uncertainty. The main objective of this work is to provide fault tolerance mechanism which is energy efficient and responsive to network using BNs. It is also used to detect energy depletion of node, link failure between nodes, and packet error in DSN. The proposed model is used to detect faults at node, sink and network level faults (link failure and packet error). The proposed fault recovery model is used to achieve fault tolerance by adjusting the network of the randomly deployed sensor nodes based on of its probabilities. Finally, the performance parameters for the proposed scheme are evaluated.
Źródło:
Journal of Telecommunications and Information Technology; 2014, 4; 44-52
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Automatic installation of software-based fault tolerance algorithms in programs generated by GCC compiler
Autorzy:
Piotrowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/397833.pdf
Data publikacji:
2010
Wydawca:
Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
Tematy:
kompilator GCC
single event upsets
GCC compiler
software based fault tolerance
Opis:
The problem of designing radiation-tolerant devices working in application critical systems becomes very important especially if human life depends on the reliability of control mechanisms. One of the possible solution of this problem are pure software protection methods. They constitute different category of techniques to detect transient faults and correct corresponding errors. Software fault tolerance schemes are cheaper to implement since they can be used with standard, commercial of-the-shelf (COTS) components. Additionally, they do not require any hardware modification. In this paper, author propose a new implementation mechanism for software based fault protection algorithms performed automatically during application compilation.
Źródło:
International Journal of Microelectronics and Computer Science; 2010, 1, 3; 263-268
2080-8755
2353-9607
Pojawia się w:
International Journal of Microelectronics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Torque characteristics of double-stator permanent magnet synchronous machines
Autorzy:
Awah, C. C,
Okoro, O. I.
Powiązania:
https://bibliotekanauki.pl/articles/140529.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fault-tolerance
mutual-and self-inductance
power
static torque and torque-density
Opis:
The torque profile of a double-stator permanent magnet (PM) synchronous machine of 90 mm stator diameter having different rotor pole numbers as well as dual excitation is investigated in this paper. The analysis includes a comparative study of the machine’s torque and power-speed curves, static torque and inductance characteristics, losses and unbalanced magnetic force. The most promising flux-weakening potential is revealed in 13- and 7-rotor pole machines. Moreover, the machines having different rotor/stator (Nr/Ns) pole combinations of the form Nr = Ns ± 1 have balanced and symmetric static torque waveforms variation with the rotor position in contrast to the machines having Nr = Ns ± 2. Further, the inductance results of the analyzed machines reveal that the machines with odd rotor pole numbers have better fault-tolerant capability than their even rotor pole equivalents. A prototype of the developed double-stator machine having a 13-pole rotor is manufactured and tested for verification.
Źródło:
Archives of Electrical Engineering; 2017, 66, 4; 815-828
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 32

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