title: Unified dead-time compensation structure for SISO processes with multiple dead times.
abstract: This paper proposes a dead-time compensation structure for processes with multiple dead times. The controller is based on the filtered Smith predictor (FSP) dead-time compensator structure and it is able to control stable, integrating, and unstable processes with multiple input/output dead times. An equivalent model of the process is first computed in order to define the predictor structure. Using this equivalent model, the primary controller and the predictor filter are tuned to obtain an internally stable closed-loop system which also attempts some closed-loop specifications in terms of set-point tracking, disturbance rejection, and robustness. Some simulation case studies are used to illustrate the good properties of the proposed approach.
authors.affiliation: Departamento de Automação e Sistemas, Universidade Federal de Santa Catarina, 88040-900 Florianópolis, SC, Brazil. Electronic address: julio.normey@ufsc.br.
authors.forename: Julio E
authors.initials: JE
authors.lastname: Normey-Rico
authors.affiliation: Departamento de Automação e Sistemas, Universidade Federal de Santa Catarina, 88040-900 Florianópolis, SC, Brazil. Electronic address: rodolfo.flesch@ufsc.br.
authors.forename: Rodolfo C C
authors.initials: RC
authors.lastname: Flesch
authors.affiliation: Departamento de Engenharia Elétrica, Universidade Federal da Bahia, 40210-630 Salvador, BA, Brazil. Electronic address: tlsantos@ufba.br.
authors.forename: Tito L M
authors.initials: TL
authors.lastname: Santos
keywords: Dead-time compensators; Multiple dead-time processes; Predictors; Robust stability