An Estimation Approach for Process Control based on Asymmetric Oscillations
- José Sánchez Moreno
- María Guinaldo Losada
- Sebastián Dormido
- José Luis Fernández Marrón
- Antonio Visioli
- Hilario López García (coord.)
Publisher: Servicio de Publicaciones ; Universidad de Oviedo
ISBN: 978-84-16664-74-0
Year of publication: 2017
Pages: 181-188
Congress: Jornadas de Automática (38. 2017. Gijón)
Type: Conference paper
Abstract
An estimation procedure for process control has been developed based on the information obtained from the oscillations that a non-linear element as a simple relay introduces in the feedback loop. Features of the method are: (a) the procedure does not demand a priori process information, (b) non-iterative algorithms are needed to derive the process parameters, (c) only one test is needed, and (d) it allows identifying the process at a user-specified phase lag in the third quadrant. The method is presented for estimation of most common transfer functions found in chemical and process industry: integrators, first-, second- as well as processes with non-minimum-phase dynamics.