Robust observer based Fault Tolerant Tracking Control for T-S uncertain systems subject to sensor and actuator faults
Autor: | Maha Bouattour, Salama Makni, Ahmed El Hajjaji, Mohamed Chaabane |
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Rok vydání: | 2018 |
Předmět: |
0209 industrial biotechnology
Computer science Applied Mathematics 020208 electrical & electronic engineering Fuzzy model Uncertain systems Fault tolerance 02 engineering and technology Computer Science Applications Tracking error 020901 industrial engineering & automation Control and Systems Engineering Control theory Robustness (computer science) Bounded function 0202 electrical engineering electronic engineering information engineering Electrical and Electronic Engineering Observer based Actuator Instrumentation |
Zdroj: | ISA transactions. 88 |
ISSN: | 1879-2022 |
Popis: | This paper investigates the sensor and actuator fault (SAF) estimations and the fault tolerant tracking control (FTTC) problem for uncertain systems represented by Takagi–Sugeno (T–S) fuzzy model affected by Unknown Bounded Disturbance (UBD). A robust descriptor adaptive observer based FTTC is firstly designed to simultaneously estimate the unmeasurable system states and SAF vectors and then to track reference trajectories. Sufficient design conditions are developed in terms of Linear Matrix Inequalities ( L M I s ) . The gains of both observer and fault tolerant controller are computed by solving a set of LMI constraints in single step. Robustness against external disturbances is analysed using the H ∞ performance index to attenuate its effect on the tracking error for bounded reference inputs. Finally, simulation results are illustrated by considering three types of actuator faults. Moreover, two comparisons are presented to show the mentioned process effectiveness. |
Databáze: | OpenAIRE |
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