System identification and characteristics of multiple input and multiple output (MIMO) water mixing equipment

Abstract

Multiple input and multiple output (MIMO) water mixing equipment is a prototype used to study the process
control concepts. This equipment is used for manipulating multiple inputs and their effect on the outputs. The
input variables are hot water (HW) temperature, cold water (CW) temperature, and flow rate of HW and CW. The
output variables are the level of the water in the tank, the temperature of the water, and the flow of outlet water. The
changes in controlled variables with the effect of manipulated variables were investigated. The transfer function for
the given experimental setup was developed and the time constant for the given system was also developed. These
transfer function and analysis of MIMO can be useful for the analysis of various MIMO-based process equipments.