RT Journal Article
T1 An event-based adaptation of the relay feedback experiment for frequency response identification of stable processes
A1 La Torre, L. de
A1 Chacón Sombría, Jesús
A1 Sánchez Moreno, J.
A1 Dormido, S.
AB An event-based modification of the classical relay feedback experiment without the inclusion of additional elements (integrator, time delay, ...) for identification of the spectrum of stable processes between zero and the phase cross-over frequency is presented. By inserting an event-based sampler in the control loop, the natural behaviour of a classical relay is simulated and the system is forced to work in two modes. The event-based sampler activates the first mode by sending control actions to the process every time the error signal crosses zero; this mode is to discover the approximated value of the cross-over frequency & omega;180 degrees. During the second mode, the event-based sampler sends samples to the process simulating that the error signal crosses zero at & omega;180 degrees /N where N is the number of points to identify in the range 0 & LE; & omega; & LE; & omega;180 degrees. One advantage of this procedure is that the logic used in an already existing relay feedback experiment to fit a transfer function model or tune a controller could be maintained just replacing the relay block by the event-based sampler block presented in the paper. Simulations and experiments with different processes and in presence of noise demonstrate the effectivity of the procedure.
PB Elsevier
SN 0019-0578
YR 2023
FD 2023-08
LK https://hdl.handle.net/20.500.14352/102963
UL https://hdl.handle.net/20.500.14352/102963
LA eng
NO 2023 Acuerdos transformativos CRUE
NO Agencia Estatal de Investigación (España)
DS Docta Complutense
RD 5 abr 2025