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DOI: 10.23952/cot.2024.14
Received June 5, 2023; Accepted September 12, 2023; Published online January 10, 2024
Abstract. Systems have to be controlled to ensure the required properties both in steady state and during the transient response. Control systems are based on negative feedback. The output of the system is compared to the reference signal and the difference serves as the input of the controller unit. The output of the controller modifies the input of the process. The structure and the parameters of the controller have to be determined appropriately to ensure the requested control performance. The basic feedback structure ensures reference signal tracking and disturbance rejection as well. Several extensions of the usual control structure are given as using not only the output signal for feedback but also other available information (inner signals, measurable disturbance) the performance can be improved. Nowadays newer control paradigms have come into the front of interest both relating control structures enhancing the opportunities of negative feedback, and control algorithms which can handle better e.g., big dead time, uncertainties, nonlinearities in the system to be controlled. YOULA-parameterization provides simple design and effective control even for systems containing big dead time. The paper gives an overview, description, evaluation and comparison of the different control paradigms. It is shown that the best usable method is the YOULA-parameterization based regulator design and the so-called KB parameterization introduced by the authors. Several examples illustrate the performance of the control systems.
How to Cite this Article:
L. Keviczky, C. Bányász, R. Bars, Control structures and control algorithms: The advantages of YOULA parameterization, Commun. Optim. Theory 2024 (2024) 14.