Publication

Fault-tolerant control of discrete-time descriptor systems using virtual actuators

Conference Article

Conference

Conference on Control and Fault Tolerant Systems (SYSTOL)

Edition

4th

File

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Abstract

This paper proposes a fault-tolerant control (FTC) strategy based on virtual actuators for discrete-time descriptor systems subject to multiplicative and additive actuator faults. The goal of this FTC strategy is to reconfigure the closed-loop system by means of a virtual actuator that allows maintaining the use of the nominal controller without having to retune it. To achieve this goal, we define the structure of a dynamical virtual actuator for descriptor systems including multiplicative and additive actuator faults. In order to use a state-feedback controller for implementing the FTC strategy, a state observer for descriptor systems is also defined. Under the proposed FTC scheme, the separation principle of the virtual actuator, the nominal closed-loop system and the state observer is established. Therefore, all the gains can be designed separately. Finally, a numerical example is provided to show the effectiveness of the proposed FTC strategy.

Categories

control system analysis, control system synthesis, control theory.

Author keywords

Fault tolerant control, descriptor systems, virtual actuators, linear matrix inequalities

Scientific reference

Y. Wang, D. Rotondo, V. Puig, G. Cembrano and Y. Zhao. Fault-tolerant control of discrete-time descriptor systems using virtual actuators, 4th Conference on Control and Fault Tolerant Systems, 2019, Casablanca, Morocco, to appear.