Resumo:
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.
