Analysis and Design of Partially Decentralized Controllers

【摘要】：It is well-known that decentralized controllers may not achieve desired performance for a strongly-coupled multivariable process,and multivariable controllers are usually complex in structure and difficult to implement in practice,so partially decentralized controllers (PDC) may be used to improve the performance while retaining the simplicity of decentralized controllers.In this paper,a partially decentralized controller is designed for a distillation column.The PDC structure is analyzed via Gramian based interaction measure,and an expansion method is used to design the PDC.Robust stability of the closed-loop control system under the PDC is analyzed via the structure singular value method.Simulation results show that the PDC can achieve better performance and robustness than decentralized controllers.