Reconfigurable control design with integration of a reference governor and reliability indicators

Philippe Weber; Boumedyen Boussaid; Ahmed Khelassi; Christophe Aubrun

International Journal of Applied Mathematics and Computer Science (2012)

  • Volume: 22, Issue: 1, page 139-148
  • ISSN: 1641-876X

Abstract

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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.

How to cite

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Philippe Weber, et al. "Reconfigurable control design with integration of a reference governor and reliability indicators." International Journal of Applied Mathematics and Computer Science 22.1 (2012): 139-148. <http://eudml.org/doc/208090>.

@article{PhilippeWeber2012,
abstract = {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.},
author = {Philippe Weber, Boumedyen Boussaid, Ahmed Khelassi, Christophe Aubrun},
journal = {International Journal of Applied Mathematics and Computer Science},
keywords = {fault tolerant control systems; control allocation; reliability estimation; performance degradation; reference governor},
language = {eng},
number = {1},
pages = {139-148},
title = {Reconfigurable control design with integration of a reference governor and reliability indicators},
url = {http://eudml.org/doc/208090},
volume = {22},
year = {2012},
}

TY - JOUR
AU - Philippe Weber
AU - Boumedyen Boussaid
AU - Ahmed Khelassi
AU - Christophe Aubrun
TI - Reconfigurable control design with integration of a reference governor and reliability indicators
JO - International Journal of Applied Mathematics and Computer Science
PY - 2012
VL - 22
IS - 1
SP - 139
EP - 148
AB - 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.
LA - eng
KW - fault tolerant control systems; control allocation; reliability estimation; performance degradation; reference governor
UR - http://eudml.org/doc/208090
ER -

References

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