A unified observer for robust sensorless control of DC–DC converters

Cimini, Gionata; Ippoliti, Gianluca; Orlando, Giuseppe; Longhi, Sauro; Miceli, R.

doi:10.1016/j.conengprac.2017.01.012

Cited by 33 publications

(26 citation statements)

References 29 publications

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“…In [1], a general linear observer (Kalman filter) was employed. In this work, a recently proposed robust and efficient nonlinear current observer [25] was selected with very good results due to its specialized nonlinear structure as well as the high sampling frequency used. A brief description of this structure is given below; for more details, please refer to [25].…”

Section: Nonlinear Current Observermentioning

confidence: 99%

“…With reference to the bilinear formulation of the converter dynamics as in (7), the observer formula proposed in [25] for the estimated state vectorx = [x 1x2 ] T ∈ R 2×1 based on the output estimation error x 2 =x 2 − x 2 (recall that x 2 = V 0 is the output voltage directly measured) is given by the following continuous-time equations:…”

Section: Nonlinear Current Observermentioning

confidence: 99%

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An MPC Reference Governor Approach for Enhancing the Performance of Precompensated Boost DC–DC Converters

Yfoulis

2019

Energies

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This article addresses the problem of enhancing the performance of boost DC–DC converters that are already compensated either in voltage-mode by a common proportional–integral–derivative (PID, Type III) primary controller or in current-mode with a two-loop PI control law. Improved performance may be obtained with the addition of a secondary controller/prefilter in the form of a reference governor. This complementary scheme adjusts the imposed voltage reference input signal dynamically and can be designed in an optimal fashion via the model predictive control (MPC) methodology. Our evaluation with numerical simulation in MATLAB suggests that this two-level controller can effectively enhance the performance of a DC–DC boost converter in a wide operating range without imposing extra requirements or limitations. A simple linear MPC design in explicit form is employed in this approach, which is computationally tractable for digital microprocessor implementation. This work paves the way for future research involving reference governor ideas in the area of bilinear power electronic converters.

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Section: Nonlinear Current Observermentioning

confidence: 99%

Section: Nonlinear Current Observermentioning

confidence: 99%

An MPC Reference Governor Approach for Enhancing the Performance of Precompensated Boost DC–DC Converters

Yfoulis

2019

Energies

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“…In the very last years, the continuously increasing tightening of efficiency and performance requirements (ENERGY STAR ® ) enhanced several research branches in the control of power supplies [1][2][3][4]. Among them, model predictive control (MPC) saw a wide interest from both academy and industry [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Model predictive control for pre‐compensated voltage mode controlled DC–DC converters

Cavanini

Cimini

Ippoliti

et al. 2017

IET Control Theory & Applications

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This study introduces the use of model predictive control (MPC) to improve the performance of pre-compensated power supplies, and in particular of DC-DC converters, by dynamically modifying their output voltage reference. The importance of developing controllers for pre-compensated converters is twofold. First, the hierarchical structure is particularly useful when the primal controller is already coded, or hardware based, and cannot be changed. Second, the double-loop and, possible, multi-rate structure represents a computationally cheaper alternative to a direct MPC that would replace the primal controller and would require a much higher sampling frequency. In this study a MPC controller has been applied for the regulation of a pre-compensated synchronous DC-DC buck converter. The aim is to improve the performance of standard voltage mode control (VMC), without replacing the linear controller and without drastically affecting the computational burden. The algorithm has been tested both in simulation and experimentally, on commercially available hardware. The results show the performance improvement with respect to the standard VMC, as well as the feasibility of the proposed approach in an embedded platform. Tests with different primal controller tunings, and unknown varying loads, confirm the advantages of the method.

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“…T denote an observer gain matrix chosen through analysing the stability of the proposed closed-loop system [38,39].…”

Section: Observer Designmentioning

confidence: 99%

Practical Implementation of the Backstepping Sliding Mode Controller MPPT for a PV-Storage Application

et al. 2019

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This study presents a design and an implementation of a robust Maximum Power Point Tracking (MPPT) for a stand-alone photovoltaic (PV) system with battery storage. A new control scheme is applied for the boost converter based on the combination of the adaptive perturb and observe fuzzy logic controller (P&O-FLC) MPPT technique and the backstepping sliding mode control (BS-SMC) approach. The MPPT controller design was used to accurately track the PV operating point to its maximum power point (MPP) under changing climatic conditions. The presented MPPT based on the P&O-FLC technique generates the reference PV voltage and then a cascade control loop type, based on the BS-SMC approach is used. The aims of this approach are applied to regulate the inductor current and then the PV voltage to its reference values. In order to reduce system costs and complexity, a high gain observer (HGO) was designed, based on the model of the PV system, to estimate online the real value of the boost converter’s inductor current. The performance and the robustness of the BS-SMC approach are evaluated using a comparative simulation with a conventional proportional integral (PI) controller implemented in the MATLAB/Simulink environment. The obtained results demonstrate that the proposed approach not only provides a near-perfect tracking performance (dynamic response, overshoot, steady-state error), but also offers greater robustness and stability than the conventional PI controller. Experimental results fitted with dSPACE software reveal that the PV module could reach the MPP and achieve the performance and robustness of the designed BS-SMC MPPT controller.

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A unified observer for robust sensorless control of DC–DC converters

Cited by 33 publications

References 29 publications

An MPC Reference Governor Approach for Enhancing the Performance of Precompensated Boost DC–DC Converters

An MPC Reference Governor Approach for Enhancing the Performance of Precompensated Boost DC–DC Converters

Model predictive control for pre‐compensated voltage mode controlled DC–DC converters

Practical Implementation of the Backstepping Sliding Mode Controller MPPT for a PV-Storage Application

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