An Observer-Based Composite Nonlinear Feedback Controller for Robust Tracking of Uncertain Nonlinear Singular Systems With Input Saturation

Mobayen, Saleh; Dastjerdi, Mohammad Taghi; Ghaffari, Valiollah; Assawinchaichote, Wudhichai; Fekih, Afef

doi:10.1109/access.2022.3179464

Cited by 5 publications

(3 citation statements)

References 42 publications

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“…A disturbance rejection control is designed to permanent magnet synchronous motor (PMSM) utilizing a load observer (Lu et al, 2021). In singular systems, by a CNF control coupling with an observer, the output tracking is robustly carried out with a time-varying set-point (Jafari and Binazadeh, 2019; Rizi et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Observer-based integral controller using composite nonlinear feedback for saturated control systems

Ghaffari

Vazani

2023

Transactions of the Institute of Measurement and Control

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Usually, simultaneous improvement of the transient performance and static accuracy is a challenging issue in saturated control systems. Employing an observer and the concept of composite nonlinear feedback, an integral controller is developed for constrained continuous-time systems. To achieve the control goal in the regulation purpose, a linear model is first derived by linearization about the operating point. Some parameters of the integral control are adjusted via the feedback passivation idea. The integral control law would be presented when a passivity condition is satisfied. Adding suitable damping terms to the existing one, the final controller is modified to enhance the response quality of the closed-loop system. The obtained results are evaluated in some numerical real examples. Although such a control method uses linearization, the outcomes of simulations, as well as the calculated performance indexes, discover the efficiency of the designed control system over the comparable ones.

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Section: Introductionmentioning

confidence: 99%

Observer-based integral controller using composite nonlinear feedback for saturated control systems

Ghaffari

Vazani

2023

Transactions of the Institute of Measurement and Control

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“…Chaos synchronization is one of the widely studied phenomena of nonlinear science that has greatly expanded people's perception from all across the world. Because of the widespread presence of chaos in many systems, researchers have been seriously interested in studying chaotic systems for over three decades [1][2][3]. Chaos causes unpredictable and inappropriate system behavior and leads to irreparable losses.…”

Section: Introductionmentioning

confidence: 99%

Internal Synchronization Using Adaptive Control

Shahzad¹,

Raziuddin²,

Naheed³

2022

Computational and Mathematical Methods

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This paper mainly deals on the issue of a chaotic synchronization of a master and slave systems. It is generally the requirement of the synchronization that someone needs at least one to one master and slave systems. In the current study, the authors introduce the concept of a synchronization in which there is no need of slave/response system externally. Furthermore, the synchronization has been demonstrated here within a system among the subsystems of different orders. In addition, adaptive control is chosen for the synchronization among various combinations in multiswitching manner. For demonstration purpose, Lorenz Six Dimensional Hyper Chaotic System (L6DHCS) is chosen. There are three different kinds of possible switches presented by the authors formed within the considered system. The numerical simulations are carried out to validate the effectiveness of the analytical technique using Mathematica.

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“…The linear part is planned where the closed-loop system operates in the non-saturated region. So it provides a fast response with a small damping-ratio (Rizi et al, 2022a). The nonlinear term incorporates to increase the damping-ratio near the set-point.…”

Section: Introductionmentioning

confidence: 99%

Robust composite nonlinear feedback control based on integral sliding-mode control of uncertain time-delay systems under input saturation

Hu¹,

Ghaffari

Mobayen

et al. 2022

Journal of Vibration and Control

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In this research, based on the integral sliding-mode scheme, a robust composite nonlinear feedback (CNF) control is addressed for time-delayed uncertain systems. Such an uncertain system may contain some complexities like time-varying delays, actuators saturation, and exterior disturbances. Hence, the tracking problem would be solved under the mentioned constraints. Thus, for achieving these goals, the tracking problem is firstly formulated by considering system’s limitations. The controller parameters may be determined via a solution for linear matrix inequality. As a result, the CNF tracker law is numerically simulated in some control cases. The simulation outcomes are compared with a similar technique in terms of the transient response, boundedness of the error, and the disturbance rejections. Thus, the findings illustrate the efficiency of the advised CNF control method comparing to the recent technique.

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An Observer-Based Composite Nonlinear Feedback Controller for Robust Tracking of Uncertain Nonlinear Singular Systems With Input Saturation

Abstract: Date of publication xxxx 00, 0000, date of current version xxxx 00, 0000.

Cited by 5 publications

References 42 publications

Observer-based integral controller using composite nonlinear feedback for saturated control systems

Observer-based integral controller using composite nonlinear feedback for saturated control systems

Internal Synchronization Using Adaptive Control

Robust composite nonlinear feedback control based on integral sliding-mode control of uncertain time-delay systems under input saturation

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