Abstract
In the multivariable control systems, controlled variables and manipulated variables interact each other in general. Therefore, it is necessary to remove their interaction for improvement of control performance. In this case a non-interacting precompensator in frequency region is well known as an effective method to remove the interaction. However, the interaction can not be removed perfectly by the precompensator, so that we require much labor to design a control system considering the interaction between controlled variables and manipulated variables. This paper proposes a PID parameter adjusting law of the Multi-Inputs and Multi-Outputs control systems to reduce the trouble after diagonally dominant is achieved by the non-interacting precompensator.
