Control reconfigurability of linear time-invariant systems

Wu, N. Eva; Zhou, Kemin; Salomon, Gregory

doi:10.1016/s0005-1098(00)00080-7

Cited by 108 publications

(54 citation statements)

References 10 publications

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“…There has been lots of theoretical results about comprehensive system evaluation in the manufacturing field, Only a few results are devoted to spacecraft reconfigurability [6,7]. Least Secondmode was brought out in [8,9] to describe the ability of system reconfiguration, which is deduced from the minimum singular value of product by the controllability Gramm matrix and observability Gramm matrix for a linear timeinvariant system. Ref.…”

Section: Introductionmentioning

confidence: 99%

Reconfiguration Analysis Based on Single Function Module Fault for Satellite Sensor Subsystems

Cheng¹,

Jiang²,

Xu³

2013

Proceedings of the 2nd International Symposium on Computer, Communication, Control and Automation

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Abstract-Reconfigurability evaluation in the design stage of satellite attitude control system is effective for building up the ability of disposing fault on orbit. This paper proposes an approach to evaluate and analyze the reconfigurability of the sensor subsystem under faulty conditions. The description of the reconfigurability in the presence of single function-module fault is formulated. An index is introduced to describe the reconfigurability of the system. The characteristic of the component and function-module is described by means of a parameter matrix, whose relation with the controllability Gramian of the attitude control system is given. Depth-firstsearch algorithm is proposed to calculate the reconfigurability parameter matrix. Simulation results on sensor subsystem illustrate the efficiency of the proposed approach, which provides an engineering method to evaluate the reconfigurability.

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Section: Introductionmentioning

confidence: 99%

Reconfiguration Analysis Based on Single Function Module Fault for Satellite Sensor Subsystems

Cheng¹,

Jiang²,

Xu³

2013

Proceedings of the 2nd International Symposium on Computer, Communication, Control and Automation

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“…The concept of reconfigurability was introduced as control system quality under given faulty conditions. In fact, introduced by Moore (1981), the second order mode has been proposed as a reconfigurability measure (Wu et al, 2000). LTI system reconfigurability can be also evaluated using the controllability and observability Gramians (Frei et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

Reconfigurability analysis for reliable fault-tolerant control design

Khelassi¹,

Theilliol²,

Weber³

2011

International Journal of Applied Mathematics and Computer Science

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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.

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“…The approach is to use an estimator to mask sensor faults through replacement of feedback variables by their estimates that are immune to sensor faults. Fault immunity is achieved by assuring a sensor arrangement that preserves system reconfigurability (Wu, Zhou, & Salomon, 2000) before and after faults occur, and by capturing the effect of faults in the model used for the design of an estimator. It is shown possible to achieve fault-tolerance without having to alter control architecture.…”

Section: Introductionmentioning

confidence: 99%

“…The estimator operates on a self-adjustable design model so that its outputs can be made immune to the effects of a specific set of component and sensor faults. The adequacy of sensor redundancy is measured using the control reconfigurability [Wu, N. E., Zhou, K., & Salomon, G. (2000). Reconfigurability in linear time-invariant systems.…”

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confidence: 99%

Sensor fault masking of a ship propulsion system

Thavamani

Zhang

et al. 2006

Control Engineering Practice

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This paper presents the results of a study on fault-tolerant control of a ship propulsion benchmark [Izadi-Zamanabadi, R., & Blanke, M. (1999). A ship propulsion system as a benchmark for fault tolerant control. Control Engineering Practice, 7 (2), 227-239] which uses estimated or virtual measurements as feedback variables. The estimator operates on a self-adjustable design model so that its outputs can be made immune to the effects of a specific set of component and sensor faults. The adequacy of sensor redundancy is measured using the control reconfigurability [Wu, N. E., Zhou, K., & Salomon, G. (2000). Reconfigurability in linear time-invariant systems. Automatica, 36 (11), 1767-1771] and the number of sensor based measurements are increased when this level is found inadequate. As a result, sensor faults that are captured in the estimator's design model can be tolerated without the need for any reconfiguration actions. Simulations for the ship propulsion benchmark show that, with additional sensors added as described and the estimator in the loop, satisfactory faulttolerance is achieved under two additive sensor faults, an incipient fault, and a parametric fault, without having to alter the original controller in the benchmark. r

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Control reconfigurability of linear time-invariant systems

Cited by 108 publications

References 10 publications

Reconfiguration Analysis Based on Single Function Module Fault for Satellite Sensor Subsystems

Reconfiguration Analysis Based on Single Function Module Fault for Satellite Sensor Subsystems

Reconfigurability analysis for reliable fault-tolerant control design

Sensor fault masking of a ship propulsion system

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