Temat: fault-tolerant control system - Katalog OPAC zbiorów

Skocz do pozycji: 1.

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

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Skocz do pozycji: 2.

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

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Skocz do pozycji: 3.

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

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