Kozáková, A.; Čápková, R.; Kozák, Š. Decentralized QFT Controller Design Based on the Equivalent Subsystems Method. Electronics2023, 12, 3658.
Kozáková, A.; Čápková, R.; Kozák, Š. Decentralized QFT Controller Design Based on the Equivalent Subsystems Method. Electronics 2023, 12, 3658.
Kozáková, A.; Čápková, R.; Kozák, Š. Decentralized QFT Controller Design Based on the Equivalent Subsystems Method. Electronics2023, 12, 3658.
Kozáková, A.; Čápková, R.; Kozák, Š. Decentralized QFT Controller Design Based on the Equivalent Subsystems Method. Electronics 2023, 12, 3658.
Abstract
Since the come up in the 70´s, various decentralized control methodologies have been developed to deal with the challenge of controlling complex and/or spatially distributed systems with multiple inputs and multiple outputs (MIMO), e.g., chemical plants, power systems, water systems, etc. In general, the use of distributed information and control structures requires to synthesize control laws in a constrained (decentralized) information structure. The article presents another version of the unified frequency domain robust decentralized controller design method [1]. The proposed design procedure is appropriate for uncertain dynamic MIMO systems given as a set of transfer function matrices. Its main framework is provided by the Equivalent Subsystems Method [1, 24] guaranteeing fulfillment of the necessary and sufficient stability condition of the overall closed-loop system if individual closed-loop equivalent subsystems are stable. Generating sets of equivalent subsystems for all transfer function matrices describing the uncertain MIMO plant allows to use the QFT method [19] to independently design local robust SISO controllers that constitute the resulting decentralized controller implemented on true subsystems. The developed design procedure is verified and illustrated on a case study on robust decentralized level controller design for a quadruple tank process [2, 24].
Keywords
decentralized control; frequency domain; independent design; MIMO system, parametric uncertainty; robust performance; robust stability; Equivalent Subsystems Method (ESM); Quantitative Feedback Theory (QFT)
Subject
Engineering, Control and Systems Engineering
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
