Síntese e validação de compensadores "antiwindup" para um sistema multivariável de mistura de líquidos

Abstract

The main contribution of this work is the application and analysis of linear controllers, along with antiwindup compensators, in a physical system. The considered system is a multivariate process aimed to control the level and temperature of a fluid in a mixing tank by varying the flows of cold and hot liquid. Since the system is nonlinear, two distinct approaches are used. First, a linear and time invariant model is used to generate a controller and an antiwindup compensator also time invariant. The second approach is to model the system as linear and dependent on time-varying parameters and to compute, as a consequence, a controller and a compensator antiwindup also variants in time. The results of theoretical simulations and practical tests allow to validate and verify the influence of antiwindup on the closed-loop control, proving to be effective.