Controle adaptativo em tempo real de uma unidade experimental

Abstract

The problem of finding the proper controller structure and the controller parameters for a given process has been subject of research over decades. Another difficulty has been the fact that the controller must be well tuned not just for one operation point but for the whole range of operational region. In addition, the parameters of the process may change in consequence of several reasons such as long time use, faults, nonlinearities, hysteresis, etc. Adaptive control techniques can be used to deal with these types of problem. This work presents a study of on-line estimation algorithms and it implements some of these algorithms experimentally in a level control plant. The experimental setup is a liquid level control system connected to a digital computer. It was employed a tank with variable transversal area and other with constant transversal area. This feature yields both a variant and invariant time systems. The experimental results are also compared to the simulation results.