In this paper, a robust relay feedback structure is used to provide a stable oscillation under
large static disturbances or drift. This relay structure is composed of a block to remove static …

In this paper, an iterative method to identify first-order plus dead-time (FOPDT) models is
proposed. The proposed method uses two frequency points as equality constraints to …

In this paper, a relay feedback structure which is robust to disturbances is applied to
estimate multiple frequency points of processes with two-inputs two-outputs (TITO). The …

In this paper, the stability of a relay feedback structure that provides a stable and
symmetrical oscillation for process under disturbances is analysed. The relay feedback …

Neste trabalho, uma estrutura com realimentacao por rele robustaa perturbacoes e aplicada
em processos com duas entradas e duas saıdas (TITO). A estrutura do rele e composta por …