Recent Advances on Optimization for Control, Observation, and Safety

Valencia‐Palomo, Guillermo; López‐Estrada, Francisco‐Ronay; Rotondo, Damiano

doi:10.3390/pr8020201

Cited by 1 publication

(3 citation statements)

References 27 publications

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“…Fault-hiding is achieved by inserting appropriate blocks in the loop, which are called virtual actuators (VA) in the case of actuator faults and virtual sensors (VS) in the case of sensor faults. The main advantage of this approach with respect to other existing alternatives is that fault tolerance can be added to an already existing control scheme following a plug-and-play philosophy [21]. This strategy has been applied successfully to several classes of systems, such as linear systems [22], piecewise affine [23], Hammerstein-Wiener [24], Takagi-Sugeno [25] and linear parameter varying [26], [27].…”

Section: B State-of-the-artmentioning

confidence: 99%

“…Let us analyze the closed-loop dynamics of the augmented system composed of the faulty system (1), the delayed virtual actuator and the virtual sensor given by Definitions 2 and 3 as well as the nominal observer-based delayed controller (21).…”

Section: Overall Analysis and Designmentioning

confidence: 99%

“…Theorem 5: Consider the faulty descriptor system (1), the nominal controller in (21), the delayed virtual actuator in (23) and the virtual sensor (27). Let us define a new vector of state variables…”

Section: Overall Analysis and Designmentioning

confidence: 99%

See 2 more Smart Citations

Fault-Tolerant Control Based on Virtual Actuator and Sensor for Discrete-Time Descriptor Systems

Wang

Rotondo

Puig

et al. 2020

IEEE Trans. Circuits Syst. I

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This article proposes a fault-tolerant control (FTC) strategy based on virtual actuator and sensor for discrete-time descriptor systems subject to actuator and sensor faults. The fault-tolerant closed-loop system, which includes the nominal controller and observer, as well as the virtual actuator and the virtual sensor, hides the effects of faults. When an observer-based state-feedback law is considered, the existence of algebraic loop may prevent the practical implementation due to the current algebraic states depending on the current control input, that affects also the implementation of the virtual actuator/sensor. To deal with this issue, an observer-based delayed feedback controller and a delayed virtual actuator are proposed for discrete-time descriptor systems. Furthermore, the satisfaction of the separation principle is shown, and an improved admissibility condition is developed for the design of the controller and virtual actuator/sensor. Finally, some simulation results including an electrical circuit are used to demonstrate the applicability of the proposed methods.

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