Explicit distributed model predictive control design for chemical processes under constraints and uncertainty

Abstract

AbstractIn multivariable industrial processes, the common distributed model predictive control strategy is usually unable to deal with complex large‐scale systems efficiently, especially under system constraints and high control performance requirements. Based on this situation, we use the distributed idea to divide the large‐scale system into multiple subsystems and transform them into the state space form. Combined with the output tracking error term, we build an extended non‐minimal state space model that includes output error and measured output and input. When dealing with system constraints, the new constraint matrix is divided into range and kernel space by using the explicit model predictive control algorithm, which reduces the difficulty of solving constraints in the extended system and further improves the overall control performance of the system. Finally, taking the coke furnace pressure control system as an example, the proposed algorithm is compared with the conventional distributed model predictive control algorithm using non‐minimal state space, and the simulation results show the feasibility and superiority of this method.