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

Download the digital copy of the doc pdf document

Authors

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.