METHOD OF COLLECTING DATA FOR PROCESS IDENTIFICATION OF A MULTIVARIABLE PROCESS

A method of collecting data for process identification of a multivariable process is provided. The method includes, for each input variable of a set of input variables of the multivariable process, performing a bi-directional excitation experiment. The bi-directional excitation experiment includes setting the input variable at an initial input value. The bi-directional excitation experiment includes performing a first excitation of the input variable, comprising setting the input variable at a first excited input value at a first time, wherein the first excited input value differs from the initial input value by a first amount. The bi-directional excitation experiment includes measuring a plurality of output variables of the multivariable process in response to performing the first excitation, wherein a respective hysteresis level is associated to each of the measured output variables. The bi-directional excitation experiment includes identifying a hysteresis exceeding output variable among the measured plurality of output variables, wherein the hysteresis exceeding output variable is an output variable having a measured value that exceeds the hysteresis level associated with the output variable. The bi-directional excitation experiment includes performing a second excitation of the input variable in response to identifying the hysteresis exceeding output variable, wherein performing the second excitation comprises setting the input variable at a second excited input value at a second time, wherein the second excited input value differs from the initial input value by a second amount, wherein the first amount and the second amount have opposite signs. The bi-directional excitation experiment includes measuring at least the hysteresis exceeding output variable in response to performing the second excitation. The bi-directional excitation experiment includes setting the input variable at a final input value at a third time after the second time. Procédé de collecte de données pour identification de processus d'un processus multivariable. Le procédé comprend, pour chaque variable d'entrée d'un ensemble de variables d'entrée du processus multivariable, la réalisation d'une expérience d'excitation bidirectionnelle. L'expérience d'excitation bidirectionnelle comprend le réglage de la variable d'entrée à une valeur d'entrée initiale. L'expérience d'excitation bidirectionnelle comprend la réalisation d'une première excitation de la variable d'entrée, comprenant le