MIMO Controller Design Using SISO Controller Design Methods

Abstract A two step procedure for the design of multivariable controllers is presented. First SISO controllers are designed for every process transfer function matrix element separately. Then the MIMO controller is computed by inverting a matrix containing the reciprocals of the SISO controllers. It is shown that complete decoupling is achieved using the controller. A modified procedure for the design of MIMO PI controllers is also given. Three examples are included.