Banca de DEFESA: TANIEL SILVA FRANKLIN

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE : TANIEL SILVA FRANKLIN
DATA : 04/12/2020
HORA: 08:30
LOCAL: https://conferenciaweb.rnp.br/webconf/tito-luis-maia-santos
TÍTULO:

CONTRIBUTIONS FOR THE CONTROL OF SYSTEMS WITH TIME VARYING DEADTIME: FREQUENCY APPROACH BASED ON PREDICTORS

PALAVRAS-CHAVES:

Time-delay systems, time-varying delay, predictor, robustness

PÁGINAS: 145
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Elétrica
SUBÁREA: Eletrônica Industrial, Sistemas e Controles Eletrônicos
ESPECIALIDADE: Controle de Processos Eletrônicos, Retroalimentação
RESUMO:

Introduction: Time-delay systems are presents in several industrial sectors and they has also beeing affected by 4.0 connectivity trends whose changes impose relevant control challenges in order to achieve robust performance due time varying deadtime effect included in control loops. Objective: propose simple and robust stability criteria to systems affected by time varying delay and controlled by predictors using a frequency approach based on small gain theorem. Methods: based on small gain theorem some criteria are proposed using predictors in order to compensate a constant portion of time varying deadtime and the others criteria are obtained directly on second order systems described by receptances. Unstructured uncertainty descriptions are used as a way to simplify robust analysis and the results are illustrated through simulations and an experimental case. Results: the criteria obtained provide limited values to maximum deadtime based on model information and uncertainties bounds. The robust stability can be recovered through the robustness filter during operation by adjusting the filter tuning. The criteria are simple to apply and can be verified using computational mathematical tools. Besides that, there is no needs to assume any information about time delay change rate. Conclusion: simulation and experimental results illustrate the usefulness of this approach as an alternative to traditional methods, which usually disregard the use of predictors and their impact on robustness margins and time varying deadtime.

MEMBROS DA BANCA:
Presidente - 1889072 - TITO LUIS MAIA SANTOS
Interno - 1677082 - HUMBERTO XAVIER DE ARAUJO
Externo à Instituição - ANTONO DA SILVA SILVEIRA - UFPA
Externo à Instituição - BISMARK CLAURE TORRICO - UFC
Externo à Instituição - CARLOS EDUARDO TRABUCO DOREA - UFRN