Publication
Passivation blocks for fault tolerant control of nonlinear systems
Journal Article (2021)
Journal
Automatica
Pages
109450
Volume
125
Doc link
https://doi.org/10.1016/j.automatica.2020.109450
File
Authors
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Bessa, Iury
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Puig Cayuela, Vicenç
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Martinez Palhares, Reinaldo
Abstract
This paper describes a novel passivity/dissipativity based approach for fault tolerant control (FTC) of nonlinear systems by means of fault hiding, i.e., by inserting reconfiguration blocks (RBs) between the plant and controller to mitigate the fault effects. The proposed approach is used to design a new kind of RB, called passivation block (PB), which is generically employed for sensor and actuator faults and achieves simultaneously series, feedback and feedfoward passivation of the controller during a fault occurrence. Based on the dissipativity theory, new conditions are obtained to design a dynamic PB (DPB) which requires minimum information on the system model. In particular, the proposed DPB can be systematically obtained by combining the LMI-based conditions based on the knowledge about the passivity indices. Numerical simulations are carried out and indicate that the PBs are able to stabilize an example of a faulty nonlinear system
Categories
control theory.
Scientific reference
I. Bessa, V. Puig and R. Martinez Palhares. Passivation blocks for fault tolerant control of nonlinear systems. Automatica, 125: 109450, 2021.
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