Projeto e ajuste simultâneo de controladores em cascata e compensadores de realimentação pelo método das inequações

Abstract

In this work a new framework for design of single input–single output (SISO) control systems by the Method of Inequalities (MI) is presented, based on a more complete standard system configuration and with more flexibility for definition of the parameters to be set. The MI is a computer-aided design (CAD) procedure which, by means of iterative search algorithms, tries to find a values combination of the adjustable parameters of the system so as to satisfy all the design constraints and specifications, which are expressed by a set of inequalities. The MI is applied to the simultaneous design and tuning of cascade controllers and feedback compensators for single-input single-output linear time invariant control systems. The design strategy includes the option of system optimization trough minimization of the integral of absolute error multiplied by time (IAET). The computational implementation of the MI developed in this work includes a graphical user interface that eases data input and output visualization, thus making the design a lot faster. Its use and the MI effectiveness are illustrated by some examples of application.