Improved linear sliding mode controller of buck converters through adding terminal sliding mode

Wang, Yanmin; Peng, Haoping; Ji, Shanlin; Dai, Mingcong

doi:10.1109/ascc.2017.8287252

Cited by 5 publications

(7 citation statements)

References 17 publications

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“…The controller design usually consists of a sliding surface and a continuous or discontinuous control law design. Therefore, for the buck converter system in ( 6), a linear sliding surface and the commonly used discontinuous control law can be designed as follows [28]…”

Section: B Description Of the Sm Controllermentioning

confidence: 99%

“…In much literature, SMC has been fully proved for its merits as strong robustness, easy implementation and good performance with the switching property, which can be well applied in controlling DC-DC converters [25]- [27]. For example, the linear sliding mode (LSM), terminal sliding mode control (TSMC), and non-singular terminal sliding mode control (NTSMC) methods for buck converters are proposed in [28], [29] and [30], respectively. In order to further enhance the ability of SMC to overcome model uncertainties and external disturbances, the control strategy combining SM controller and disturbance observers is proposed.…”

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: B Description Of the Sm Controllermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

2022

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“…A review of recent SM applications in power converters can be referred to [18]. For example, in [19], a linear sliding mode (LSM) controller was proposed to guarantee the asymptotic convergence of the output voltage; in [20], a terminal sliding mode (TSM) control approach was proposed to improve steady accuracy and response speed by introducing finite-time convergence; in [21], a non-singular terminal sliding mode (NTSMC) control approach was proposed to realize wide-range voltage regulation of the buck converters, due to its global finite-time convergence. Although the above SM approaches are the three commonly used types in practice, they belong to the traditional first-order SM (1-SM) [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, if u = 1, the power switch S w is ON; while if u = 0, the power switch S w is OFF. Since it is easy and simple to implement, many types of 1-SM controllers have been adopted, including the commonly used LSM [19], TSM [20] and NTSM [21].…”

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Adaptive Second-Order Sliding Mode Control of Buck Converters with Multi-Disturbances

et al. 2022

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In this paper, a novel adaptive second-order sliding mode (2-SM) control approach, based on online zero-crossing detection, was proposed to solve the problems of the chattering and fixed control gain for buck converters with multi-disturbances. In modeling, the possible parameter perturbations and external disturbances of the converter system were contained. Instead of the traditional first-order sliding mode (1-SM), the twisting algorithm with 2-SM was adopted for the controller design, which could overcome the chattering problem and realize control continuity. Meanwhile, a novel adaptive mechanism was introduced to replace the conventional fixed control gain by time-varying control gain, the idea of which is to calculate the number of the zero-crossing points of the sliding surface online. As a result, the control magnitude of the improved controller could be reduced to a minimal admissible level, and the steady error of the output voltage could converge to the expected value. Furthermore, the robust stability of the converter system with multi-disturbances wads investigated. Comparative simulations and experiments validated the advantages of this paper as offering better robustness and control performance.

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Analysis of Multiple Droop Control Strategies in DC Microgrid

Kong

Jiao

2020

2020 12th IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)

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Improved linear sliding mode controller of buck converters through adding terminal sliding mode

Cited by 5 publications

References 17 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

Adaptive Second-Order Sliding Mode Control of Buck Converters with Multi-Disturbances

Analysis of Multiple Droop Control Strategies in DC Microgrid

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