Robust Control for PWM-Based DC–DC Buck Power Converters With Uncertainty Via Sampled-Data Output Feedback

Zhang, Chuanlin; Wang, Junxiao; Li, Shihua; Wu, Bin; Qian, Chunjiang

doi:10.1109/tpel.2014.2299759

Cited by 190 publications

(95 citation statements)

References 39 publications

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“…In the SMC, the discrete control input u can be theoretically replaced by a smooth function known as the equivalent control signal u eq . This equivalent control signal can be obtained by force time differentiation of Equation (7) equals zero, as shown in Equation (14).…”

Section: Equivalent Control Of Smcmentioning

confidence: 99%

“…Meanwhile, in the present paper, the second-order sliding surface and the additional integral are analyzed and designed, respectively. In [14] a sampled-data reduced-order observer is adopted to deal with the unknown parameters, and a robust sampled-data output feedback control law developed to achieve global tracking control performance in high precision for buck converter.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

PWM-Based Sliding Mode Controller for Three-Level Full-Bridge DC-DC Converter that Eliminates Static Output Voltage Error

Liu¹,

Xiao²,

Ma³

et al. 2015

Journal of Power Electronics

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This paper proposes a pulse width modulation (PWM)-based sliding mode controller (SMC) for a full-bridge DC-DC converter that can eliminate static output voltage error. Hysteretic SMC in DC-DC converter does not have a fixed switching frequency, and applying hysteretic SMC to full-bridge converters is difficult. Fixed-frequency SMC, which is also called PWM-based SMC, based on equivalent control overcomes these shortcomings. However, the controller order reduction in equivalent control in PWM-based SMC causes static output voltage error. To resolve this issue, an integral item is added to the PWM-based SMC. Sliding mode coefficients are designed by applying a standard second-order system to the sliding mode surface. The effect of adding an integral item on the controller is analyzed, and an integral coefficient design method is proposed. Experiment results on a three-level full-bridge DC-DC converter verify the control scheme and design method proposed in this paper.

show abstract

Section: Equivalent Control Of Smcmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

PWM-Based Sliding Mode Controller for Three-Level Full-Bridge DC-DC Converter that Eliminates Static Output Voltage Error

Liu¹,

Xiao²,

Ma³

et al. 2015

Journal of Power Electronics

View full text Add to dashboard Cite

show abstract

“…Advances in computational power availability of new generation of hardware devices enable practical implementation of modern advanced control approaches, i.e. sliding-mode control [5], [7], [9], [10], [14], geometric approach [8], robust control [4], [16], adaptive control [6], disturbance rejection control [15], [17], and receding optimization control [3], [18]- [20], to enhance the control performance of DC-DC buck converters. Among them, receding optimization control (ROC) has attracted considerable attention in the field of power converter control, attributed to the many advantages of its control algorithmic capacity guaranteeing optimized fast dynamic tracking responses to reference mutation, uncertain nonlinearities and undesirable disturbances [19].…”

Section: Introductionmentioning

confidence: 99%

Optimized Active Disturbance Rejection Control for DC-DC Buck Converters With Uncertainties Using a Reduced-Order GPI Observer

Yang

Cui

et al. 2018

IEEE Trans. Circuits Syst. I

Self Cite

161

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Abstract-The output voltage regulation problem of a PWMbased DC-DC buck converter under various sources of uncertainties and disturbances is investigated in this paper via an optimized active disturbance rejection control (ADRC) approach. Aiming to practical implementation, a new reduced-order generalized proportional integral (GPI) observer is first designed to estimate the lumped (possibly time-varying) disturbances within the DC-DC circuit. By integrating the disturbance estimation information raised by the reduced-order GPI observer (GPIO) into the output prediction, an optimized ADRC method is developed to achieve optimized tracking performance even in the presence of disturbances and uncertainties. It is shown that the proposed controller will guarantee the rigorous stability of closed-loop system, for any bounded uncertainties of the circuit, by appropriately choosing the observer gains and the bandwidth factor. Experimental results illustrate that the proposed control solution is characterised by improved robustness performance against various disturbances and uncertainties compared to traditional ADRC and integral MPC approaches.

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“…f (x(t), v(t), t) is an uncertain function representing the lumped disturbance in a general way which possibly includes external disturbances, unmodeled dynamics, parameter variations, and complex nonlinear dynamics. [1][2][3][4][5][6][7][8] In modern control practices, it is a trend that sampled-data controllers with a zero-order holder (ZOH) are being digitally implemented into real-life plants with the rapid development of computational hardware technology. It is common that conventional control law design is always devoted to continuous-time design for mathematically modeled continuous-time systems due to the convenience of direct stability analysis, typically based on the continuously differentiable Lyapunov function analysis.…”

Section: Introductionmentioning

confidence: 99%

Sampled-data active disturbance rejection output feedback control for systems with mismatched uncertainties

You

Sun

et al. 2017

Advances in Mechanical Engineering

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This article investigates the sampled-data disturbance rejection control problem for a class of non-integral-chain systems with mismatched uncertainties. Aiming to reject the adverse effects caused by general mismatched uncertainties via digital control strategy, a new generalized discrete-time extended state observer is first proposed to estimate the lumped disturbances in the sampling point. A disturbance rejection control law is then constructed in a sampled-data form, which will lead to easier implementation in practices. By carefully selecting the control gains and a sampling period sufficiently small to restrain the state growth under a zero-order-holder input, the bounded-input bounded-output stability of the hybrid closed-loop system and the disturbance rejection ability are delicately proved even the controller is dormant within two neighbor sampling points. Numerical simulation results demonstrate the feasibility and efficacy of the proposed method.

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Robust Control for PWM-Based DC–DC Buck Power Converters With Uncertainty Via Sampled-Data Output Feedback

Cited by 190 publications

References 39 publications

PWM-Based Sliding Mode Controller for Three-Level Full-Bridge DC-DC Converter that Eliminates Static Output Voltage Error

PWM-Based Sliding Mode Controller for Three-Level Full-Bridge DC-DC Converter that Eliminates Static Output Voltage Error

Optimized Active Disturbance Rejection Control for DC-DC Buck Converters With Uncertainties Using a Reduced-Order GPI Observer

Sampled-data active disturbance rejection output feedback control for systems with mismatched uncertainties

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