Control Reconfiguration After Actuator Failures Using Disturbance Decoupling Methods

Lunze, Jan; Steffen, Thomas

doi:10.1109/tac.2006.882938

Cited by 135 publications

(90 citation statements)

References 8 publications

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“…The main idea of the virtual actuator FTC method, first introduced in Lunze and Steffen (2006), is to reconfigure the faulty plant such that the nominal controller could still be used without need of retuning it. The plant with the faulty actuators is modified adding the virtual actuator block that masks the fault and allows the controller to see the same plant as before the fault.…”

Section: Virtual Actuator Designmentioning

confidence: 99%

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Fault Tolerant Control of a PEM Fuel Cell using qLPV Virtual Actuators

2015

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Abstract:This paper proposes a fault tolerant control (FTC) strategy based on the use of quasi-linear parameter varying (qLPV) virtual actuators approach for proton exchange membrane (PEM) fuel cells. The overall solution relies on adding a virtual actuator in the control loop to hide the fault from the controller point of view, allowing it to see the same plant as before the fault, in this way keeping the stability and some desired performances. The proposed methodology is based on the use of a reference model, where the resulting nonlinear error model is brought to a qLPV form that is used for control design by means of linear matrix inequalities (LMI)-based techniques. The resulting closed-loop error system is stable with poles placed in some desired region of the complex plane. Simulation results are used to show the effectiveness of the proposed approach.

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Section: Virtual Actuator Designmentioning

confidence: 99%

“…When the reconfiguration block aims at tolerating actuator faults, it is named virtual actuator. Initially proposed in a state space form for LTI systems (Lunze and Steffen, 2006), this paradigm has been successfully extended to other system structures (Rotondo Dziekan et al, 2011;Richter et al, 2011;Blesa et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Fault Tolerant Control of a PEM Fuel Cell using qLPV Virtual Actuators

2015

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“…The proposed strategy relied on virtual actuators, a fault-hiding technique that aims at reconfiguring the faulty plant instead of the controller [17]- [21]. In [22], this strategy has been extended to linear parameter varying (LPV) systems, a standard formalism for performing gain scheduling of nonlinear systems [23].…”

Section: Introductionmentioning

confidence: 99%

Virtual actuator-based FTC for LPV systems with saturating actuators and FDI delays

Rotondo

Ponsart

Nejjari

et al. 2016

2016 3rd Conference on Control and Fault-Tolerant Systems (SysTol)

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Abstract-The main contribution of this paper consists in solving the problem of fault tolerant control (FTC) for linear parameter varying (LPV) systems subject to actuator saturation and fault detection and isolation (FDI) delays. The FTC is based on virtual actuators that reconfigure the faulty plant to maintain the stability and to avoid the saturation of the actuators. On the other hand, a design methodology that provides the nominal output-feedback controller, which maximizes the tolerated delay between the fault occurrence and its isolation, is developed. The design process consists in finding the optimal feasible solution to a finite set of linear matrix inequalities (LMIs). Finally, an example is used to illustrate the theoretical results.

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“…Lunze and Steffen (2006) showed that control reconfiguration of a linear system after an actuator fault is equivalent to disturbance decoupling. Control reconfiguration methods using virtual actuators and sensors for piecewise affine systems and Hammerstein-Wiener systems were proposed in , , Richter et al (2011) and Richter (2011).…”

Section: Introductionmentioning

confidence: 99%

Reconfigurable Control of Input Affine Nonlinear Systems under Actuator Fault

Tabatabaeipour

Galeazzi

2015

IFAC-PapersOnLine

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This paper proposes a fault tolerant control method for input-affine nonlinear systems using a nonlinear reconfiguration block (RB). The basic idea of the method is to insert the RB between the plant and the nominal controller such that fault tolerance is achieved without re-designing the nominal controller. The role of the RB is twofold: on one hand it transforms the output of the faulty system such that its behaviour is similar to that of the nominal one from the controller's viewpoint; on the other hand it modifies the control input to the faulty system such that the stability of the reconfigured loop is preserved. The RB is realized by a virtual actuator and a reference model. Using notions of incremental and input-to-state stability (ISS), it is shown that ISS of the closed-loop reconfigured system can be achieved by the separate design of the virtual actuator. The proposed method does not need any knowledge of the nominal controller and only assumes that the nominal closed-loop system is ISS. The method is demonstrated on a dynamic positioning system for an offshore supply vessel, where the virtual actuator is designed using backstepping.

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Control Reconfiguration After Actuator Failures Using Disturbance Decoupling Methods

Cited by 135 publications

References 8 publications

Fault Tolerant Control of a PEM Fuel Cell using qLPV Virtual Actuators

Fault Tolerant Control of a PEM Fuel Cell using qLPV Virtual Actuators

Virtual actuator-based FTC for LPV systems with saturating actuators and FDI delays

Reconfigurable Control of Input Affine Nonlinear Systems under Actuator Fault

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