Temperature control of water-bath system in presence of constraints by using MPC

Abstract

Water-Bath temperature control is of vital importance in several beverages product industries and in medical field for treatment of different diseases using aqua therapy and most of the control processes operate at constraints. PID and other non-optimization based control techniques do not handle input and output constraints effectively. MPC is an optimization based control technique with effective constraints handling ability in comparison to other control techniques. This paper is an application of sophisticated MPC for temperature control of Water-Bath system and presents the simulations of temperature control of water-bath system for medical use in aqua therapy. The results have been analyzed in three modes temperature control without constraints, with input constraints and with output constraints. In all three modes MPC effectively regulates the temperature within predetermined constraints limits. Finally robustness of MPC for temperature control of Water-Bath system is tested by varying the inlet flow rate of water and MPC again performs better by achieving the desired temperature efficiently.