In this paper, a model reference fault tolerant control strategy based on a reconfiguration of the reference model, with the addition of a virtual actuator block, is presented for uncertain systems affected by disturbances and sensor noise. In particular, this paper (1) extends the reference model approach to the use of interval state observers, by considering an error feedback controller, which uses the estimated bounds for the error between the real state and the reference state, and (2) extends the virtual actuator approach to the use of interval observers, which means that the virtual actuator is added to the control loop to preserve the nonnegativity of the interval estimation errors and the boundedness of the involved signals, in spite of the fault occurrence. In both cases, the conditions to assure the desired operation of the control loop are provided in terms of linear matrix inequalities. An illustrative example is used to show the main characteristics of the proposed approach.

Fault tolerant control of uncertain dynamical systems using interval virtual actuators / Rotondo, Damiano; Cristofaro, Andrea; Johansen Tor, Arne. - In: INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL. - ISSN 1049-8923. - 28:2(2018), pp. 611-624. [10.1002/rnc.3888]

Fault tolerant control of uncertain dynamical systems using interval virtual actuators

Cristofaro Andrea;
2018

Abstract

In this paper, a model reference fault tolerant control strategy based on a reconfiguration of the reference model, with the addition of a virtual actuator block, is presented for uncertain systems affected by disturbances and sensor noise. In particular, this paper (1) extends the reference model approach to the use of interval state observers, by considering an error feedback controller, which uses the estimated bounds for the error between the real state and the reference state, and (2) extends the virtual actuator approach to the use of interval observers, which means that the virtual actuator is added to the control loop to preserve the nonnegativity of the interval estimation errors and the boundedness of the involved signals, in spite of the fault occurrence. In both cases, the conditions to assure the desired operation of the control loop are provided in terms of linear matrix inequalities. An illustrative example is used to show the main characteristics of the proposed approach.
2018
fault tolerant control (FTC); interval observers; linear matrix inequalities (LMIs); model reference control; uncertain systems; virtual actuators
01 Pubblicazione su rivista::01a Articolo in rivista
Fault tolerant control of uncertain dynamical systems using interval virtual actuators / Rotondo, Damiano; Cristofaro, Andrea; Johansen Tor, Arne. - In: INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL. - ISSN 1049-8923. - 28:2(2018), pp. 611-624. [10.1002/rnc.3888]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1329711
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