Banca de DEFESA: ISAAC DANTAS ISIDÓRIO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : ISAAC DANTAS ISIDÓRIO
DATA : 31/01/2018
HORA: 15:00
LOCAL: Laboratório de Automação, Controle e Instrumentação (LACI)
TÍTULO:

Variable Structure Adaptive Pole Placement Control for Supression of Chaos in the Lorenz System

PALAVRAS-CHAVES:

Adaptive Pole Placement Control, Variable Structure Systems, Lorenz System

PÁGINAS: 89
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Elétrica
SUBÁREA: Eletrônica Industrial, Sistemas e Controles Eletrônicos
ESPECIALIDADE: Controle de Processos Eletrônicos, Retroalimentação
RESUMO:

Two main methods highlight for the design of adaptive controllers: the model reference adaptive control (MRAC) and the adaptive pole placement control (APPC). In MRAC, a reference model is chosen to generate a trajectory, which must be followed by the output of the plant to be controlled. This type of project may involve cancellation of the plant zeros, not applicable to non-minimum phase plants. APPC, in turn, is considered the most general type of adaptive control, presenting a design methodology for the controller and adaptation law quite flexible, besides not involving  plant zero-pole cancellations. The combination of the conventional adaptive methods, that use integral adaptive laws, with variable structure systems (VSC) based in switching laws, allows to aggregate fast transient and robustness to disturbances and parametric uncertainties. In this context, based on a class of pole placement control schemes (PPC), the variable structure adaptive pole placement control (VS-APPC) arises. Here, such as in APPC, the control law is generated for the case with known parameters (transfer function coefficients), replacing them by their estimates. The estimation process identifies the adaptive method used, so that APPC uses integral laws while the VS-APPC makes use of switching laws. In this work is proposed, based on the variable structure adaptive pole placement control theory, a control system able to control the chaos phenomenon in Lorenz system, using only the measured plant's output and input variables. The parameters of system are considered unknown and is considered the disturbance presence in input system. It is shown that in closed-loop system, the output tracks the reference trajectory and the state vector converges to the equilibrium state, presenting good transient behavior and robustness to the parametrics uncertainties as also in presence of disturbance in input plant.

MEMBROS DA BANCA:
Presidente - 347565 - ALDAYR DANTAS DE ARAUJO
Externo ao Programa - 347564 - CAIO DORNELES CUNHA
Externo à Instituição - ODAILSON CAVALCANTE DE OLIVEIRA - IFRN