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Gabriel F. Machado
Departamento de Engenharia Elétrica, Universidade Federal do Ceará, CE
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Juliana S. Barros
Departamento de Engenharia Elétrica, Universidade Federal do Ceará, CE
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Bismark C. Torrico
Departamento de Engenharia Elétrica, Universidade Federal do Ceará, CE
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Fabrício G. Nogueira
Departamento de Engenharia Elétrica, Universidade Federal do Ceará, CE
Keywords:
Time-delay systems, Extended state-observer, Predictor-based feedback, Disturbance attenuation, Discrete-time systems
Abstract
In this work, a control structure based on an observer-predictor for discrete time- delay systems is proposed. This strategy allows attenuating both polynomial and sinusoidal disturbances with known frequencies at steady-state from the process output. For this purpose, first, an extended observer-predictor based on the disturbance model is used to estimate the process states with zero error at the steady-state. Then, a predictor-based state-feedback gain is computed to obtain the desired setpoint response. Finally, to evaluate the performance of the proposed controller, it is compared through simulations with another recently published controller.
