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Volume 12 Issue 11
Nov.  2025

IEEE/CAA Journal of Automatica Sinica

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Article Navigation >  IEEE/CAA Journal of Automatica Sinica  > 2025  >  12(11): 2253-2263
C. Treesatayapun, “Pure-output feedback controller for a class of unknown nonaffine discrete-time systems with indeterminate order and non-strict dynamics,” IEEE/CAA J. Autom. Sinica, vol. 12, no. 11, pp. 2253–2263, Nov. 2025. doi: 10.1109/JAS.2025.125270
Citation: C. Treesatayapun, “Pure-output feedback controller for a class of unknown nonaffine discrete-time systems with indeterminate order and non-strict dynamics,” IEEE/CAA J. Autom. Sinica, vol. 12, no. 11, pp. 2253–2263, Nov. 2025. doi: 10.1109/JAS.2025.125270
shu

Pure-Output Feedback Controller for a Class of Unknown Nonaffine Discrete-Time Systems With Indeterminate Order and Non-Strict Dynamics

doi: 10.1109/JAS.2025.125270
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    Abstract
  • The paper presents an adaptive controller formulated for a class of nonaffine discrete-time systems with non-strict forms and unknown dynamics. The controller operates based solely on the measured output, thus obviating the need for knowledge of the physical order of the controlled plant. Utilizing an ideal solution and equivalent dynamics, the approach integrates an adaptive network with feedback and robust controllers to establish a closed-loop system. A learning law is derived under practical conditions of the designed parameters, ensuring effective closed-loop performance based on pure-output feedback. The controller’s effectiveness is validated through both numerical and experimental systems, with results meeting the conditions specified in the main theorem. Comparative analysis highlights the controller’s highly satisfactory performance and its advantages. This research offers a promising approach to adaptive control for discrete-time systems with non-strict dynamics, providing practical solutions for systems with unknown dynamics and indeterminate system order.

     

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