Regular Papers

International Journal of Control, Automation, and Systems 2025; 23(3): 683-691

https://doi.org/10.1007/s12555-023-0740-9

© The International Journal of Control, Automation, and Systems

Regulation of Feedforward Nonlinear Systems Under Unknown Time-varying Multiple Delays via Dynamic Gain Control

Sang-Young Oh and Ho-Lim Choi*

Dong-A University

Abstract

We consider a state feedback regulation problem for nonlinear systems with multiple unknown timevarying delays in the input. The considered perturbed nonlinearity has feedforward terms and unknown growth rate. To deal with unknown multiple delays, we propose a newly designed adaptive state feedback controller by utilizing the dynamic gain. We also describe how this system can be globally regulated using our control method and Lyapunov stability analysis. The effectiveness of our method is clearly illustrated via numerical and practical examples under known time-varying multiple delays.

Keywords Dynamic gain control, feedforward nonlinear systems, state feedback regulation, unknown time-varying multiple delays.

Article

Regular Papers

International Journal of Control, Automation, and Systems 2025; 23(3): 683-691

Published online March 1, 2025 https://doi.org/10.1007/s12555-023-0740-9

Copyright © The International Journal of Control, Automation, and Systems.

Regulation of Feedforward Nonlinear Systems Under Unknown Time-varying Multiple Delays via Dynamic Gain Control

Sang-Young Oh and Ho-Lim Choi*

Dong-A University

Abstract

We consider a state feedback regulation problem for nonlinear systems with multiple unknown timevarying delays in the input. The considered perturbed nonlinearity has feedforward terms and unknown growth rate. To deal with unknown multiple delays, we propose a newly designed adaptive state feedback controller by utilizing the dynamic gain. We also describe how this system can be globally regulated using our control method and Lyapunov stability analysis. The effectiveness of our method is clearly illustrated via numerical and practical examples under known time-varying multiple delays.

Keywords: Dynamic gain control, feedforward nonlinear systems, state feedback regulation, unknown time-varying multiple delays.

IJCAS
March 2025

Vol. 23, No. 3, pp. 683~972

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IJCAS

eISSN 2005-4092
pISSN 1598-6446