Abstract
In many industrial systems, the multivariable system which has mutual interference has to be dealt with. Therefore, decoupling the multivariable system is an important issue to construct a control system. Although various decoupling methods are proposed from the former, the present condition is that industrial application is not carried out positively. In such a background, the decoupling method in which an inverted decoupler was used, attracts attention due to the handling being easy as compared to the conventional method in recent years. That design approach has a desirable design for the continuous-time system. However, from a practical viewpoint, the design approach in a discrete-time system is desirable. In this paper, an inverted decoupler in a discrete-time system is constructed, and the design method of the multi-loop PID controller to the decoupling system is considered. Specifically, self-tuning control is constructed, whose decoupler and controller are simultaneously adjusted in an on-line manner. The effectiveness of this proposed method is shown by a numerical simulation.
