Non-fragile observer-based robust control for uncertain systems via aperiodically intermittent control

Yang, Ying; He, Yong

doi:10.1016/j.ins.2021.05.046

Cited by 26 publications

(14 citation statements)

References 44 publications

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“…Therefore, the research on the robust control of uncertain systems is not only of theoretical significance but also of important application value [6][7][8]. At present, the theoretical research on uncertain systems is very active, and the research contents are especially extensive [9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Robust stability analysis for uncertain neutral type descriptor systems with mixed delays

Chen,

Wang,

Gao

et al. 2023

IET Control Theory & Appl

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The issue of robust stability here is carefully thought about for uncertain neutral type descriptor systems (NTDSs) with mixed delays. An augmented Lyapunov–Krasovskii functional considering the cross information of the singular matrix and state delay derivative is constructed. With the help of the zero‐value equation technique and an improved matrix inequality, a novel delay‐dependent admissible criterion is developed to make sure of the regularity, non‐impulsiveness, and stability of the NTDSs. On this basis, the robust stability of the uncertain NTDSs is further explored, and a novel robust stability criterion is developed. These criteria have less conservatism. Through three number‐based examples, some comparisons are provided to show the superiority and effectiveness of our method.

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Section: Introductionmentioning

confidence: 99%

Robust stability analysis for uncertain neutral type descriptor systems with mixed delays

Chen,

Wang,

Gao

et al. 2023

IET Control Theory & Appl

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“…Kumar et al [11] designed a robust controller based on stability boundary locus and the Kharitonov theorem. All the aforementioned robust control approaches (i) focused on mitigating disturbances (line and load) and neglected both plant and controller parameter uncertainties [4][5][6][7][8][9]. A laboratory real-time interface such as dSPACE and Labview was used to verify the control approach.…”

Section: Introductionmentioning

confidence: 99%

“…4. The proposed controller is implemented with a lowcost microcontroller, unlike laboratory real-time interfaces such as dSPACE and LabVIEW-based data acquisition [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…Yang et al [6] proposed a disturbance observer that can estimate the disturbance due to the circuit component's uncertainty and eliminate it effectively using state feedback. Similarly, many researchers used LMI‐based state feedback control with H ∞ /H 2 norm‐bound constrain on disturbance attenuation to deal with uncertainties [7, 8].…”

Section: Introductionmentioning

confidence: 99%

“…The robustness‐fragility analysis of the controller is presented using Alfaro's delta epsilon fragility index. This index is used to quantify the robustness or fragility of a controller in the presence of parameter variations or uncertainties. The proposed controller is implemented with a low‐cost microcontroller, unlike laboratory real‐time interfaces such as dSPACE and LabVIEW‐based data acquisition [5–9]. …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental study on robust non‐fragile control of DC‐DC buck converter

Kumar,

Sarkar

2023

Asian Journal of Control

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The presence of uncertainty in the converter model and controller parameters affects the system's stability and dynamic performance. This paper presents a comparative analysis of robust non‐fragile control based on (i) the Kharitonov method and (ii) the linear matrix inequality (LMI) technique so that the controller can cope with the effect of both uncertainties. The first approach based on Kharitonov theorem determines the robust performance region with guaranteed gain margin and phase margin under parametric uncertainty. The second approach (LMI technique) is based on devising a control law that can quadratically stabilize the closed‐loop system subject to uncertainties and satisfy the H∞ norm bound constraint on disturbance attenuation. Based on these two approaches, a robust non‐fragile PI controller is designed for voltage mode control of dc‐dc buck converter. The effectiveness of the control approaches is evaluated based on (i) robustness against large plant parameter perturbations and load disturbance and (ii) fragility against controller parameter perturbations. The performance of the designed controllers (using the Kharitonov method and the LMI technique) has been thoroughly evaluated and validated through simulation and experimental results.

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Design and practical implementation of non‐fragile controller for non‐isolated on‐board battery charger for electric vehicle

Kumar,

Sarkar,

Kumar

2024

Circuit Theory & Apps

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SummaryThis paper proposes a non‐fragile control approach for a non‐isolated two‐switch buck‐boost converter used as an on‐board charger for electric vehicles. The control scheme is based on a cascaded two‐loop configuration with non‐fragile Proportional Integral controllers in the inner current and the outer voltage loop. The control approach is based on designing a control law that can stabilize the closed‐loop system subject to uncertainties in the controller parameters while satisfying the H∞ norm bound constraint on disturbance attenuation. The proposed control technique helps to deal with inevitable uncertainties during the implementation of any control scheme. The proposed control technique is compared with the conventional approach and validated through experimental results. The experimental results are obtained from a 1‐kW laboratory prototype of a TSBB converter with an output voltage range of 150–400 V. The results demonstrate that the proposed approach effectively achieves good robustness against controller parameter variations and disturbances under various operating conditions.

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Non-fragile observer-based robust control for uncertain systems via aperiodically intermittent control

Cited by 26 publications

References 44 publications

Robust stability analysis for uncertain neutral type descriptor systems with mixed delays

Robust stability analysis for uncertain neutral type descriptor systems with mixed delays

Experimental study on robust non‐fragile control of DC‐DC buck converter

Design and practical implementation of non‐fragile controller for non‐isolated on‐board battery charger for electric vehicle

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