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Tytuł:
Fault tolerant control of a PMSM drive in the selected emergency conditions
Autorzy:
Siembab, K.
Powiązania:
https://bibliotekanauki.pl/articles/376452.pdf
Data publikacji:
2013
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
PMSM
PMSM drive
fault-tolerant inverter
FTC
Fault Tolerant Control
Opis:
The paper describes an investigation of fault tolerant control strategies for permanent magnet synchronous motor (PMSM) driven by a fault-tolerant inverter. The inverter is a topology-modified inverter with fault-tolerant capability, which can be configured as the standard 3-phase 6-switch inverter and reconfigured as 3-phase 4-switch or 2-phase 4-switch inverter under the fault condition. By analyzing operating principle of a fault-tolerant inverter and the mathematical model of PMSM, fault tolerant control algorithms are investigated. There is a conclusion that three phase stator windings of PMSM can be effectively operated by controlling only two phase currents. Simulation results show the validity of the proposed methods.
Źródło:
Poznan University of Technology Academic Journals. Electrical Engineering; 2013, 75; 165-172
1897-0737
Pojawia się w:
Poznan University of Technology Academic Journals. Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
All metric bases and fault-tolerant metric dimension for square of grid
Autorzy:
Saha, Laxman
Basak, Mithun
Tiwary, Kalishankar
Powiązania:
https://bibliotekanauki.pl/articles/2048644.pdf
Data publikacji:
2022
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
code
resolving set
metric dimension
fault-tolerant resolving set
fault-tolerant metric dimension
Opis:
For a simple connected graph G = (V,E) and an ordered subset W = {w1, w2, . . . , wk} of V , the code of a vertex v ∈ V , denoted by code(v), with respect to W is a k-tuple (d(v, w1), . . . , d(v, wk)), where d(v, wt) represents the distance between v and wt. The set W is called a resolving set of G if code(u) ≠ code(v) for every pair of distinct vertices u and v. A metric basis of G is a resolving set with the minimum cardinality. The metric dimension of G is the cardinality of a metric basis and is denoted by β(G). A set F ⊂ V is called fault-tolerant resolving set of G if F \ {v} is a resolving set of G for every v ∈ F. The fault-tolerant metric dimension of G is the cardinality of a minimal fault-tolerant resolving set. In this article, a complete characterization of metric bases for G2 mn has been given. In addition, we prove that the fault-tolerant metric dimension of G2 mn is 4 if m + n is even. We also show that the fault-tolerant metric dimension of G2 mn is at least 5 and at most 6 when m + n is odd.
Źródło:
Opuscula Mathematica; 2022, 42, 1; 93-111
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Systematic fault tolerant control based on adaptive Thau observer estimation for quadrotor UAVs
Autorzy:
Cen, Z.
Noura, H.
Younes, Y. A.
Powiązania:
https://bibliotekanauki.pl/articles/329914.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
systematic fault tolerant control
fault estimation
adaptive Thau observer
fault tolerant capacity boundaries
time varying fault
sterowanie tolerujące uszkodzenia
estymacja błędu
Opis:
A systematic fault tolerant control (FTC) scheme based on fault estimation for a quadrotor actuator, which integrates normal control, active and passive FTC and fault parking is proposed in this paper. Firstly, an adaptive Thau observer (ATO) is presented to estimate the quadrotor rotor fault magnitudes, and then faults with different magnitudes and time-varying natures are rated into corresponding fault severity levels based on the pre-defined fault-tolerant boundaries. Secondly, a systematic FTC strategy which can coordinate various FTC methods is designed to compensate for failures depending on the fault types and severity levels. Unlike former stand-alone passive FTC or active FTC, our proposed FTC scheme can compensate for faults in a way of condition-based maintenance (CBM), and especially consider the fatal failures that traditional FTC techniques cannot accommodate to avoid the crashing of UAVs. Finally, various simulations are carried out to show the performance and effectiveness of the proposed method.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2015, 25, 1; 159-174
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Active fault-tolerant control design for Takagi-Sugeno fuzzy systems
Autorzy:
Dziekan, L.
Witczak, M.
Korbicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/202326.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fault-tolerant control
state estimation
observers
fault diagnosis
convergence
Opis:
In this paper, a virtual actuator-based active fault-tolerant control strategy is presented. After a short introduction to Takagi-Sugeno fuzzy systems, it is shown how to design a fault-tolerant control strategy for this particular class of non-linear systems. The key contribution of the proposed approach is an integrated fault-tolerant control design procedure of fault identification and control within an integrated fault-tolerant control scheme. In particular, fault identification is implemented with the suitable state observer. While, the controller is implemented in such a way that the state of the (possibly faulty) system tracks the state of a fault-free reference model. Consequently, the fault-tolerant control stabilizes the possibly faulty system taking into account the input constraints and some control objective function. Finally, the last part of the paper shows a comprehensive case study regarding the application of the proposed strategy to fault-tolerant control of a twin-rotor system.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2011, 59, 1; 93-102
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Enhanced Reliability for Winding Machine via New Fault Tolerant Control Based on RST-Backstepping Controller
Autorzy:
Haouari, Fouad
Messekher, Salaheddine
Bali, Noureddine
Tadjine, Mohamed
Boucherit, Mohamed Seghir
Powiązania:
https://bibliotekanauki.pl/articles/1955988.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
winding machine
fault tolerant control
backstepping control
RST control
Opis:
Due to the external disturbances, model uncertainties, strong coupling, and occurred faults, the winding machine presents a great control challenge. In order to deal with these problems, this paper presents the formulation of a novel scheme of fault tolerant control (FTC) for three-motor web-winding systems; it is concerned with the nonlinear robust backstepping control based on the combination of RST and backstepping controllers where the process is modelled by a nonlinear model. The main contribution of the paper is that the approach developed here summarises the performance of RST and backstepping controllers in order to design a robust controller capable of eliminating external disturbances and sensor faults affecting the system. The stability of the whole system is proven using the Lyapunov theory. Finally, analysis in comparison with the conventional backstepping controller and simulations in the MATLAB environment are accomplished to confirm the efficiency of the proposed method.
Źródło:
Power Electronics and Drives; 2021, 6, 41; 229-241
2451-0262
2543-4292
Pojawia się w:
Power Electronics and Drives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Compensation methods of current and speed sensor faults for a vector controlled induction motor drive system
Autorzy:
Klimkowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/1193297.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
DFOC
speed sensor
current sensor
detector
fault tolerant drive
Opis:
Chosen speed and current sensor fault detectors for a vector controlled induction motor drive system have been presented. Systems based on the artificial intelligence (neural network) and simple algorithmic systems were analyzed and tested in various drive conditions. The influence of chosen sensor faults on performance of the drive system has been presented. The compensation strategy was proposed and tested. A fault tolerant drive, based on hardware redundancy, has been developed and presented. Simulation and experimental results are obtained in direct field oriented control algorithm (DFOC) on the laboratory set-up with rapid prototyping card Micro Lab Box DS1202 by dSpace.
Źródło:
Power Electronics and Drives; 2017, 2, 37/1; 57-69
2451-0262
2543-4292
Pojawia się w:
Power Electronics and Drives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Friction compensation in nonlinear dynamical systems using fault-tolerant control methods
Autorzy:
Bonfè, M.
Castaldi, P.
Preda, N.
Simani, S.
Powiązania:
https://bibliotekanauki.pl/articles/327170.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
fault-tolerant control
friction compensation
nonlinear systems
differential geometry
Opis:
This paper describes the application of differential geometry and nonlinear systems analysis to the estimation of friction effects in a class of mechanical systems. The proposed methodology relies on adaptive filters, designed with a nonlinear geometric approach to obtain the disturbance de-coupling property, for the estimation of the friction force. Thanks to accurate estimation, friction effects are compensated by injecting the on-line estimate of friction force to the control action calculated by a standard linear state feedback. The inverted pendulum on a cart is considered as an application example and the proposed approach is compared with a commonly used friction compensation strategy, based on an explicit model of the friction force.
Źródło:
Diagnostyka; 2013, 14, 4; 13-19
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on topology of a novel three-phase four-leg fault-tolerant NPC inverter
Autorzy:
Zhang, Baoge
Ping, Shanyan
Long, Yyi
Jiao, Yyuemin
Wu, Bboxiang
Powiązania:
https://bibliotekanauki.pl/articles/2086722.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fault tolerant operation
midpoint potential equilibrium
NPC inverter
topology reconstruction
Opis:
Diode neutral point clamped (NPC) three-level converters have been widely used in recent years. Aiming at the problems of the high device failure rate and unstable neutral point potential of NPC three-level converters, an NPC three-level circuit with fourth bridge arm redundancy is proposed based on the traditional NPC three-level converter. The redundant fourth bridge arm is used to realize the function of stabilizing voltage when there is no fault and replacing the fault half-bridge arm to maintain the continuous operation of the converter when there is a fault. By analyzing the working principle of space vector pulse width modulation (SVPWM) and the power loss of the switch, it is of particular significance to the design and control of NPC three-level converters in the future. Matlab/Simulink verifies the feasibility of the fault-tolerant circuit structure.
Źródło:
Archives of Electrical Engineering; 2022, 71, 2; 489--506
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling and fault-tolerant control of 5-phase induction machine
Autorzy:
Rolak, M.
Che, H. S.
Malinowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/202453.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
multiphase machine
fault tolerant
post-fault
fault detection
tolerancja błędu
detekcja błędu
maszyny wielofazowe
Opis:
The paper presents modeling and analysis of a 5-phase induction machine connected to 2-level 5-leg converter in case of open-phase failure. A control of the machine is accomplished using the Field Oriented Control with hysteresis current controllers. Moreover, a fault-tolerant algorithm is addressed and simulated.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2015, 63, 4; 989-996
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fault-tolerant control for three-phase three-level T-type inverters with a redundant leg
Autorzy:
Chen, Danjiang
Zheng, Liyuan
Powiązania:
https://bibliotekanauki.pl/articles/2172799.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fault diagnosis
fault-tolerant control
open-circuit fault
phase-leg fault
redundant leg
T-type inverter
Opis:
Three-level T-type inverters have lower total harmonic distortion in output voltage, higher power density and lower voltage stress of power switches compared with conventional two-level inverters and have been widely used in applications with a wide-power range. Reliability improvement is particularly important for the T-type inverters because of the increased number of power switches and high system complexity. This paper proposes a fault-tolerant topology, which is constructed by adding a redundant leg including halfbridge switches and neutral-point switches connected between the DC bus capacitors and the DC-link midpoint of the conventional T-type inverter. In addition, an after-fault control strategy is proposed based on the results of a fault diagnosis method using bridge voltage. The fault-tolerant control of the open-circuit fault of the power switches and the phase-leg fault can both be achieved by the proposed method. Experimental results are given to verify that the proposed fault-tolerant three-level T-type inverter can output the full voltage level and power during the fault-tolerant operation based on the proposed control strategy.
Źródło:
Archives of Electrical Engineering; 2022, 71, 4; 931--948
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of rotor position sensor fault tolerant control in electric vehicle with PM BLDC motor drives
Autorzy:
Skóra, M.
Powiązania:
https://bibliotekanauki.pl/articles/140658.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
PM BLDC motor
Hall effect sensor
fault tolerant drive
ZOA
electric vehicle
Opis:
In order to develop a PM BLDC motor control system, which will be tolerant of selected faults, simulation work was first performed and then verified on a universal test stand. The results were published in earlier works. The next stage of works was the implementation of previously developed algorithms on the target research test stand – in this case, the prototype vehicle. This last stage of the laboratory work has been presented in this article, i.e. it has been presented the results of experimental research related to the reproduction of rotor angle position, used after the detection of a rotor position sensor fault. A new test stand with the laboratory prototype of a vehicle with two PM BLDC motors is presented. A zeroth-order algorithm (ZOA) was used as a fault compensation method. The effectiveness and usefulness of the previously proposed methods have been confirmed.
Źródło:
Archives of Electrical Engineering; 2018, 67, 4; 725-738
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An artificial neural networks approach to stator current sensor faults detection for DTC-SVM structure
Autorzy:
Klimkowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/1193212.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
DTC-SVM
current sensor
induction motor
detector
fault tolerant drive
neural network
Opis:
In the paper, an analysis is made of the stator current sensor fault detector based on artificial neural network for vector controlled induction motor drive system. The systems with different learning algorithms and structures are analyzed and tested in different drive conditions. Simulation results are obtained in direct torque control algorithm (DTC-SVM) and performed in MATLAB/SimPowerSystem software.
Źródło:
Power Electronics and Drives; 2016, 1, 36/1; 127-138
2451-0262
2543-4292
Pojawia się w:
Power Electronics and Drives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Koncepcja neuronowego detektora uszkodzeń czujnika prędkości dla układów napędowych z silnikiem indukcyjnym sterowanych metodą polowo zorientowaną
Concept of the speed sensor faults detector for DFOC drive based on the neural network
Autorzy:
Klimkowski, K.
Dybkowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/376204.pdf
Data publikacji:
2015
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
napęd elektryczny
enkoder
fault tolerant
FTC
czujniki pomiarowe
detekcja uszkodzeń
detektor neuronowy
Opis:
W artykule przedstawiono koncepcję układu napędowego z silnikiem indukcyjnym sterowanym metodą polowo - zorientowaną o zwiększonym stopniu bezpieczeństwa. Do detekcji uszkodzenia wykorzystano sztuczną sieć neuronową. Detektor sprawdzono w różnych warunkach pracy, dla różnych rodzajów uszkodzeń czujnika. Opracowano kompletny system o zwiększonym stopniu bezpieczeństwa. Badania symulacyjne wykonano w środowisku Matlab/SimPowerSystem.
In the paper the concept of safety induction motor drive system is presented. The speed sensor fault detector, based on the neural network, is described and tested in vector controlled (DFOC) induction motor drive. The fault tolerant algorithm using this system was applied and tested during different conditions. Simulation (obtained in MATLAB/SimPowerSystem) results are presented.
Źródło:
Poznan University of Technology Academic Journals. Electrical Engineering; 2015, 83; 129-138
1897-0737
Pojawia się w:
Poznan University of Technology Academic Journals. Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fault Tolerant Radiation Monitoring System Using Wireless Sensor and Actor Network in a Nuclear Facility
Autorzy:
Yehia Habash, Mohamed
Ayad, Nabil Mohamed Abd Elfatah
Ammar, Abd Elhady Abd Elazim
Powiązania:
https://bibliotekanauki.pl/articles/1844596.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
WSAN
fault tolerant monitoring system
sensor readings validation
WSN in nuclear facilities
Opis:
In nuclear facilities, the reading of the sensors is very important in the assessments of the system state. The existence of an abnormal state could be caused by a failure in the sensor itself instead of a failure in the system. So, being unable to identify the main cause of the “abnormal state” and take proper actions may end in unnecessary shutdown for the nuclear facility that may have expensive economic consequences. That is why, it is extremely important for a supervision and control system to identify the case where the failure in the sensor is the main cause for the existence of an abnormal state. In this paper, a system based on a wireless sensor network is proposed to monitor the radiation levels around and inside a nuclear facility. A new approach for validating the sensor readings is proposed and investigated using the Castalia simulator.
Źródło:
International Journal of Electronics and Telecommunications; 2021, 67, 1; 87-93
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Robust multisensor fault tolerant model-following MPC design for constrained systems
Autorzy:
Yetendje, A.
Seron, M. M.
De Doná, J. A.
Powiązania:
https://bibliotekanauki.pl/articles/331458.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
sterowanie tolerujące uszkodzenia
odporność
ograniczenie
fault tolerant control
constraints
robustness
invariant set
Opis:
In this paper, a robust fault-tolerant control strategy for constrained multisensor linear systems, subject to sensor faults and in the presence of bounded state and output disturbances, is proposed. The scheme verifies that, for each sensors-estimator combination, suitable residual variables lie inside pre-computed sets and selects a more appropriate combination based on a chosen criterion. An active fault tolerant output feedback controller yields an MPC-based control law and, by means of the notion of a "tube" of trajectories, we ensure robust closed-loop exponential stability and good performance in the fault-free case and under the occurrence of abrupt sensor faults.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2012, 22, 1; 211-223
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
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