Diseño y simulación de controladores multivariables para el sistema de los cuatro tanques de Johansson y estudio del comportamiento del sistema en lazo cerrado a ataques Ciber-Físicos

Abstract

This work presents the design and simulation of three multivariable control strategies for the quadruple tank system, which was subjected subsequently, by means of simulation, to a set of cyber-physical attacks with the aim of learning the possible system’s behavior under these conditions. The problem is tackled based on the study of the multivariable system’s dynamic, which, given a physical configuration in the valves that integrate the structure, it can be found in minimum phase or non-minimum phase configuration. This analysis was useful as a tool to develop the multivariable controllers, where, one of the main objectives was to decrease the grade of cross interaction originated among the plant’s variables; the results of the governed system are presented. With the aim of simulating a cyber-physical system, a wireless network environment was proposed, in which the control and output signals a are transmitted under certain intrinsic characteristics of this type of communication; the produced effects in the system are shown. Finally, from the cyber-physical attacks models introduced in the literature, some results that arise in the multivariable system, when it is attacked by cyber-physical adversaries, are presented.