Sliding Mode Control Based on Linear Extended State Observer for DC-to-DC Buck–Boost Power Converter System With Mismatched Disturbances

Linares-Flores, J.; Juárez-Abad, José Antonio; Hernández‐Méndez, Arturo; Castro-Heredia, Omar; Guerrero-Castellanos, J.F.; Heredia-Barba, Ruben Rubens; Curiel-Olivares, G.

doi:10.1109/tia.2021.3130017

Cited by 34 publications

(16 citation statements)

References 29 publications

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“…The equations ( 6)- (10) give the dynamic equation of the buck system with multi-disturbances. Combined with the analysis of practical application scenarios, the parameter disturbances of the system itself are considered as follows: the main parameters of the buck converter system are mainly disturbed by the external environment, such as DC voltage source E and reference voltage V ref .…”

Section: A Simulations Results and Analysismentioning

confidence: 99%

“…It should be noted that multiple disturbances of the buck converter system are considered in (5) with their own boundary limitations. Therefore, the 7)-( 9), and |D 4 (t)| ≤ ψ D4 can also be derived from (10), where ψ D1 , ψ D2 , ψ D3 and ψ D4 are boundary constants.…”

Section: A Modeling the Buck Converter Under Disturbancementioning

confidence: 99%

“…from the internal parameter variations of the system, sudden changes of the load or input power supply, interferences of the measurement device or external environment, and so on [5]- [7]. In order to obtain more satisfactory performances of buck converters, many researchers focus on the design of diverse kinds of auxiliary observers based on system descriptions and different types of controllers of buck converters [8]- [10].…”

Section: Introductionmentioning

confidence: 99%

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Adaptive Continuous Sliding Mode Control of Buck Converters With Multidisturbances Based on Zero-Crossing Detection

2022

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In this paper, a novel adaptive continuous sliding mode (SM) control approach is proposed based on the robust stability analysis of buck converters with multi-disturbances. Instead of the traditional first-order SM methods, the twisting algorithm is adopted to realize the control continuity and further weaken their inherent chattering problem. By introducing the zero-crossing detection innovatively, the influence of the traditional twisting algorithm with fixed control gain led to the low precision is effectively eliminated, and the small region can be controlled due to the implementation of the adaptive time-varying control gain. In addition, the magnitude of the controller can be reduced to a minimal admissible level determined by the system stable conditions and the selection of optimization parameters. Furthermore, multiple model uncertainties and external disturbances are considered into the modeling of the buck converters and the proposed adaptive SM controllers to ensure the strong robustness of the whole system while suffering possible disturbances. Finally, comparative simulations and experiments are given to validate the effectiveness of the proposed adaptive control strategy.INDEX TERMS Adaptive continuous sliding mode control, buck converters, zero-crossing detection, multidisturbances, twisting sliding mode control.

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Section: A Simulations Results and Analysismentioning

confidence: 99%

Section: A Modeling the Buck Converter Under Disturbancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Adaptive Continuous Sliding Mode Control of Buck Converters With Multidisturbances Based on Zero-Crossing Detection

2022

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“…By using a disturbance observer, chattering can be weakened. The switching function gain k can be reduced to the upper bound of the observation error, which can realize the suppression of chattering [44,51].…”

Section: Stability Analysismentioning

confidence: 99%

“…The robustness and stability analysis of the closed-loop system was clearly proved. In [44], based on feedback linearization, an SMC combined with a linear extended-state observer, which can ensure the stability of the closed-loop system with mismatched disturbance, was designed for DC/DC buck-boost converter systems. However, the above controllers can only guarantee the exponential convergence of the system.…”

Section: Introductionmentioning

confidence: 99%

Finite-Time Parameter Observer-Based Sliding Mode Control for a DC/DC Boost Converter with Constant Power Loads

Shang

2022

Electronics

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Constant power loads have negative impedance characteristics, which reduce the damping of DC/DC converter systems and have negative effects on the stability of the DC microgrid. In this paper, a finite-time parameter observer-based sliding mode controller is proposed for a boost converter with constant power loads. Firstly, a non-singular terminal sliding-mode controller is designed based on the flatness of the differential and sliding mode control theory. Secondly, a finite-time observer is designed to estimate the input voltage and tunes the parameter of the controller in time. Thirdly, the finite-time stability of the closed-loop system is proved through the proposed controller. Finally, the effectiveness and robustness of the proposed controller with unknown input voltage are verified by simulation. The proposed controller can guarantee finite-time convergence without input voltage sensors, which can reduce system cost and improve system reliability.

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Finite‐Time Disturbance Observer‐Based Adaptive Continuous Robust Control for Buck Converter

Aghdam,

Mazare,

Torkaman

2024

Circuit Theory & Apps

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This paper proposes a novel finite‐time adaptive continuous robust control method for buck converters, combining dynamic sliding mode theory with a mismatched disturbance observer. While traditional sliding mode control can effectively manage matched disturbances, it often falls short when faced with mismatched disturbances, potentially compromising system performance. Our developed control strategy introduces a nonlinear sliding mode‐based disturbance observer and an adaptive continuous robust sliding mode control to guide state variables towards desired values. To mitigate the chattering phenomenon, the proposed controller incorporates a super‐twisting algorithm, ensuring continuous control command behavior. We conducted a rigorous finite‐time stability analysis of the control procedure using Lyapunov theory. Furthermore, comprehensive experimental results demonstrate that our proposed control method significantly reduces disturbance effects and enhances the buck converter's performance in terms of robustness and accuracy.

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Sliding Mode Control Based on Linear Extended State Observer for DC-to-DC Buck–Boost Power Converter System With Mismatched Disturbances

Cited by 34 publications

References 29 publications

Adaptive Continuous Sliding Mode Control of Buck Converters With Multidisturbances Based on Zero-Crossing Detection

Adaptive Continuous Sliding Mode Control of Buck Converters With Multidisturbances Based on Zero-Crossing Detection

Finite-Time Parameter Observer-Based Sliding Mode Control for a DC/DC Boost Converter with Constant Power Loads

Finite‐Time Disturbance Observer‐Based Adaptive Continuous Robust Control for Buck Converter

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