Reconfiguração de Controle para Robustez a Erros de Detecção e Isolamento de Falhas em Sistemas LPV a Tempo Discreto
Authors
Mariella Maia Quadros
Área de Controle e Processos Industriais, Instituto Federal de Educação, Ciência e Tecnologia de Minas Gerais – IFMG Campus Sabará, MG
Valter J. S. Leite
Departamento de Engenharia Mecatrônica, CEFET-MG Campus Divinópolis, MG
Reinaldo Martínez Palhares
Departamento de Engenharia Eletrônica, Universidade Federal de Minas Gerais (UFMG)
This paper proposes a new approach for designing reconfiguration blocks for Fault Tolerant Control (FTC) for discrete-time Linear Parameter Varying (LPV) systems. The reconfiguration block comprises a virtual sensor and a virtual actuator that makes it possible to hide sensor and actuator faults from the nominal controller. It is designed for the system without faults, without the need for its redesign. The main contribution of the paper is the development of conditions based on Linear Matrix Inequalities (LMIs) for the synthesis of a reconfiguration block with guaranteed H∞ performance so that it is robust to possible errors caused by the Fault Detection and Isolation (FDI) module in providing information to the control system. Computational simulations are performed for a nonlinear coupled tank system to verify the efficiency of the proposed methodology.
