Decoupling based predictive control analysis of a continuous stirred tank reactor

Abstract

This paper presents a decoupling based model pre dictive control strategy for a process of continuous stirred tank reactor (CSTR). The MPC strategy when used along with de coupling compensation technique seem to suffer from increase in the computational complexity of the predictive control algorithm because of the additional dynamics of decoupling compensator. In this paper, we seek to reduce the computational burden on pre dictive control algorithm utilizing a simple decoupling technique for a process with loop interactions. A CSTR MIMO process is a benchmark problem for studying loop interactions. We compensate for loop interactions by directly modifying the plant model without changing its response characteristics provided plant and model mismatch is at minimum. The proposed strategy is compared for its simplicity with multi-variable decoupling control strategies with application to MPC in process industry. Simulations show that proposed technique efficiently reduces loop interactions in CSTR process.

Analytical Study of ‘De-coupler’ and ‘Diagonal PID Controller’ for the designing of a MIMO System

“…al. [7] published a research article where the process of dynamic de-coupling strategies had been focused for the CSTR (continuous Stirred Tank Reactor) system. A critical look into the modeling and identification towards the nonlinear model using predictive control was elaborated by Bequette,B [8].…”