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Tytuł:
Reconfigurability analysis for reliable fault-tolerant control design
Autorzy:
Khelassi, A.
Theilliol, D.
Weber, P.
Powiązania:
https://bibliotekanauki.pl/articles/907596.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
sterowanie tolerujące uszkodzenia
rekonfigurowalność
niezawodność
fault tolerant control system
reconfigurability
reliability
actuator faults
Opis:
In this paper the integration of reliability evaluation in reconfigurability analysis of a fault-tolerant control system is considered. The aim of this work is to contribute to reliable fault-tolerant control design. The admissibility of control reconfigurability is analyzed with respect to reliability requirements. This analysis shows the relationship between reliability and control reconfigurability defined generally through Gramian controllability. An admissible solution for reconfigurability is proposed according to reliability evaluation based on energy consumption under degraded functional conditions. The proposed study is illustrated with a flight control application.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2011, 21, 3; 431-439
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reconfigurable control design with integration of a reference governor and reliability indicators
Autorzy:
Weber, P.
Boussaid, B.
Khelassi, A.
Theilliol, D.
Aubrun, C.
Powiązania:
https://bibliotekanauki.pl/articles/331471.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
system tolerujący uszkodzenia
szacowanie niezawodności
fault tolerant control system
control allocation
reliability estimation
performance degradation
reference governor
Opis:
A new approach to manage actuator redundancy in the presence of faults is proposed based on reliability indicators and a reference governor. The aim is to preserve the health of the actuators and the availability of the system both in the nominal behavior and in the presence of actuator faults. The use of reference governor control allocation is a solution to distribute the control efforts among a redundant set of actuators. In a degraded situation, a reconfigured control allocation strategy is proposed based on on-line re-estimation of the actuator reliability. A benefit of incorporating reliability indicators into over-actuated control system design is the smart management of the redundant actuators and improvement of the system safety. Moreover, when the fault is severe, an adaptation approach using the reference governor is proposed. The reference governor unit is a reference-offset governor based on a discrete-time predictive control strategy. The idea is to modify the reference according to the system constraints, which become stricter after the occurrence of an actuator fault. The proposed approach is illustrated with a flight control application.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2012, 22, 1; 139-148
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A mixed active and passive GLR test for a fault tolerant control system
Autorzy:
Jamouli, H.
El Hail, M. A.
Sauter, D.
Powiązania:
https://bibliotekanauki.pl/articles/331386.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
filtr Kalmana
system tolerujący uszkodzenia
generalized likelihood ratio
sequential jumps detection
two-stage Kalman filter
fault tolerant control system
Opis:
This paper presents an adaptive Generalized Likelihood Ratio (GLR) test for multiple Faults Detection and Isolation (FDI) in stochastic linear dynamic systems. Based on the work of Willsky and Jones (1976), we propose a modified generalized likelihood ratio test, allowing detection, isolation and estimation of multiple sequential faults. Our contribution aims to maximise the good decision rate of fault detection using another updating strategy. This is based on a reference model updated on-line after each detection and isolation of one fault. To reduce the computational requirement, the passive GLR test will be derived from a state estimator designed on a fixed reference model directly sensitive to system changes. We will show that active and passive GLR tests will be mixed and give interesting results compared with the GLR of Willsky and Jones (1976), and that they can be easily integrated in a reconfigurable Fault-Tolerant Control System (FTCS) to asymptotically recover the nominal system performances of the jump-free system.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2012, 22, 1; 9-23
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Universal System for Detection and Compensation of Current Sensor Faults in Three-Phase Power Electronic Systems
Autorzy:
Dybkowski, Mateusz
Jankowska, Kamila Anna
Powiązania:
https://bibliotekanauki.pl/articles/2175934.pdf
Data publikacji:
2022
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
FTC
fault-tolerant control system
active rectifier
current sensor
PMSM
permanent magnet synchronous motor
IM
induction motor
diagnostics
Opis:
The article discusses the universal current sensor fault detection and compensation mechanism, which can be applied in three-phase power electronics (PE) symmetrical system. The mechanism is based on the assumption that a symmetrical system can be described using different components in the stationary reference frame. The solution given in article as a Cri-base detector was tested in electrical drives with induction motors (IMs) and permanent magnet synchronous motors (PMSMs). This study also proves that the same algorithm can work stable in active rectifier systems. Such an application of this detector has not been previously reported in the literature. The article describes the detection of various types of faults in different phases. The fault-tolerant voltage-oriented control (FTVOC) of an active rectifier is compared with previously described solutions for IMs and PMSMs. By analysing in various types of systems, the work proves the universality of the detector based on Cri markers.
Źródło:
Power Electronics and Drives; 2022, 7, 42; 267--278
2451-0262
2543-4292
Pojawia się w:
Power Electronics and Drives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance evaluation based fault tolerant control with actuator saturation avoidance
Autorzy:
Boussaid, B.
Aubrun, C.
Abdelkrim, M. N.
Ben Gayed, M. K.
Powiązania:
https://bibliotekanauki.pl/articles/907608.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
sterowanie tolerujące uszkodzenia
sterowanie predykcyjne
wskaźnik wydajności
fault tolerant control system
performance degradation
reference management
model predictive control
performance index
Opis:
In this paper, a new approach regarding a reconfigured system is proposed to improve the performance of an active fault tolerant control system. The system performance is evaluated with an intelligent index of performance. The reconfiguration mechanism is based on a model predictive controller and reference trajectory management techniques. When an actuator fault occurs in the system, a new degraded reference trajectory is generated and the controller calculates new admissible controls. A constraint set and cost function are established to avoid actuator saturation and reduce the control energy spent in closed loop dynamics. The effectiveness of the proposed method is illustrated using a hydrothermal system subject to actuator faults and constraints on actuator dynamic ranges.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2011, 21, 3; 457-466
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Robust multiple sensor fault-tolerant control for dynamic non-linear systems: Application to the aerodynamical twin-rotor system
Autorzy:
Pazera, M.
Buciakowski, M.
Witczak, M.
Powiązania:
https://bibliotekanauki.pl/articles/330570.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
fault tolerant control
sensor fault
fault estimation
twin-rotor system
sterowanie tolerujące uszkodzenia
błąd czujnika
estymacja błędu
Opis:
The paper deals with the problem of designing sensor-fault tolerant control for a class of non-linear systems. The scheme is composed of a robust state and fault estimator as well as a controller. The estimator aims at recovering the real system state irrespective of sensor faults. Subsequently, the fault-free state is used for control purposes. Also, the robust sensor fault estimator is developed in a such a way that a level of disturbances attenuation can be reached pertaining to the fault estimation error. Fault-tolerant control is designed using similar criteria. Moreover, a separation principle is proposed, which makes it possible to design the fault estimator and control separately. The final part of the paper is devoted to the comprehensive experimental study related to the application of the proposed approach to a non-linear twin-rotor system, which clearly exhibits the performance of the new strategy.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2018, 28, 2; 297-308
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the fault tolerant induction motor drive system
Autorzy:
Klimkowski, K.
Dybkowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/97644.pdf
Data publikacji:
2014
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
fault tolerant control (FTC)
induction motor drive
diagnostic system
sensor faults
DFOC
MRAS
Opis:
In the paper the influence of the chosen sensors faults (rotor speed and stator current sensors) to the properties of vector controlled induction motor drive system are tested. Faults detection algorithms based on the simple signals from internal control structure are developed. The simulation tests carried out in Matlab/SimPowerSystem software. The proposed solution can be successfully applied in the fault tolerant drive systems.
Źródło:
Computer Applications in Electrical Engineering; 2014, 12; 302-308
1508-4248
Pojawia się w:
Computer Applications in Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Some remarks about aircraft control and navigation system as reliable fault tolerant system
Wybrane uwagi dotyczące lotniczych systemów sterowania i nawigacji, jako niezawodnych systemów tolerujących uszkodzenia
Autorzy:
Dołęga, B.
Powiązania:
https://bibliotekanauki.pl/articles/152759.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
niezawodność
system tolerujący uszkodzenia
lokalizacja uszkodzeń
lotniczy system sterowania i nawigacji
reliability
fault tolerant system
fault localisation
aircraft control and navigation system
Opis:
This paper presents some remarks about making more reliable aircraft control and navigation system. On simple examples the author presents the influence of architecture of a fault tolerant system on its reliability. The proposed description of fault diagnosis procedures and control reconfiguration enables preparation and analysis of a fault tolerant system.
Artykuł przedstawia wybrane uwagi związane z tworzeniem lotniczych systemów sterowania i nawigacji, które powinna cechować podwyższona niezawodność działania. Nie podjęto analizy konkretnego przykładu rozwiązań stosowanych w lotnictwie, ale poprzez proste przykłady architektury możliwych do zastosowania w lotnictwie rozwiązań przedstawiono ich wpływ na niezawodność i tolerowanie pojawiających się uszkodzeń. Podjęto w ten sposób próbę uzasadnienia wprowadzania wymagań tolerowania uszkodzeń w tych systemach ze względu na uzyskane wskaźniki niezawodności. Przywołując ogólną postać formuły wnioskowania deontycznego opisującą proces rekonfiguracji zaprezentowano rolę lokalizacji uszkodzeń w poprawnym działaniu takich systemów. Zaproponowany opis stosowanych procedur diagnostyki i rekonfiguracji, poprzez wykorzystanie elementów teorii zbiorów przybliżonych umożliwia zarówno przygotowanie, jak i przeprowadzenie analizy tworzonego systemu z uwzględnieniem właściwości tolerowania pojawiających się uszkodzeń. Abstract: This paper presents some remarks about making more reliable aircraft control and navigation system. On simple examples the author presents the influence of architecture of a fault tolerant system on its reliability. The proposed description of fault diagnosis procedures and control reconfiguration enables preparation and analysis of a fault tolerant system.
Źródło:
Pomiary Automatyka Kontrola; 2011, R. 57, nr 9, 9; 1024-1027
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A hybrid active fault-tolerant control scheme for wind energy conversion system based on permanent magnet synchronous generator
Autorzy:
Tahri, A.
Hassaine, S.
Moreau, S.
Powiązania:
https://bibliotekanauki.pl/articles/140788.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
wind energy conversion system
active fault-tolerant control
permanent magnet synchronous generator
sensor fault diagnosis
sliding mode observer
Opis:
Wind energy has achieved prominence in renewable energy production. There- fore, it is necessary to develop a diagnosis system and fault-tolerant control to protect the system and to prevent unscheduled shutdowns. The presented study aims to provide an experimental analysis of a speed sensor fault by hybrid active fault-tolerant control (AFTC) for a wind energy conversion system (WECS) based on a permanent magnet synchronous generator (PMSG). The hybrid AFTC switches between a traditional controller based on proportional integral (PI) controllers under normal conditions and a robust backstepping controller system without a speed sensor to avoid any deterioration caused by the sensor fault. A sliding mode observer is used to estimate the PMSG rotor position. The proposed controller architecture can be designed for performance and robustness separately. Finally, the proposed methodwas successfully tested in an experimental set up using a dSPACE 1104 platform. In this experimental system, the wind turbine with a generator connection via a mechanical gear is emulated by a PMSM engine with controled speed through a voltage inverter. The obtained experimental results show clearly that the proposed method is able to guarantee service production continuity for the WECS in adequate transition.
Źródło:
Archives of Electrical Engineering; 2018, 67, 3; 485--497
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fault tolerance in networked control systems under intermittent observations
Autorzy:
Georges, J. P.
Theilliol, D.
Cocquempot, V.
Ponsart, J. C.
Aubrun, C.
Powiązania:
https://bibliotekanauki.pl/articles/930171.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
przeciążenie sieci
sterowanie odporne na błędy
diagnostyka uszkodzeń
system sieciowy
model wielokrotny
network congestion
fault tolerant control
fault diagnosis
networked control system
interacting multiple model
Opis:
This paper presents an approach to fault tolerant control based on the sensor masking principle in the case of wireless networked control systems. With wireless transmission, packet losses act as sensor faults. In the presence of such faults, the faulty measurements corrupt directly the behaviour of closed-loop systems. Since the controller aims at cancelling the error between the measurement and its reference input, the real outputs will, in such a networked control system, deviate from the desired value and may drive the system to its physical limitations or even to instability. The proposed method facilitates fault compensation based on an interacting multiple model approach developed in the framework of channel errors or network congestion equivalent to multiple sensors failures. The interacting multiple model method involved in a networked control system provides simultaneously detection and isolation of on-line packet losses, and also performs a suitable state estimation. Based on particular knowledge of packet losses, sensor fault-tolerant controls are obtained by computing a new control law using fault-free estimation of the faulty element to avoid intermittent observations that might develop into failures and to minimize the effects on system performance and safety.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2011, 21, 4; 639-648
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
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