An immersion and invariance based input voltage and resistive load observer for DC–DC boost converter

Malekzadeh, Milad; Khosravi, Alireza; Tavan, Mehdi

doi:10.1007/s42452-019-1880-7

Cited by 9 publications

(5 citation statements)

References 31 publications

(48 reference statements)

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“…This section describes the two estimators included in the proposed control design via IOC theory with integral gain. The main idea is to implement a DC load current estimator based on the I&I method [48] as well as to estimate the input voltage value using the DO approach [41].…”

Section: Sensorless Designmentioning

confidence: 99%

A Sensorless Inverse Optimal Control Plus Integral Action to Regulate the Output Voltage in a Boost Converter Supplying an Unknown DC Load

et al. 2023

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This study utilizes inverse optimal control (IOC) theory to address the issue of output voltage regulation in a boost converter feeding an unknown direct current (DC) load. The proposed approach involves developing a general feedback control law through IOC to ensure asymptotic stability in closed-loop operation, with the added advantage of incorporating an integral gain without compromising stability. Two estimators are introduced to minimize the number of sensors required for implementing the IOC controller with integral action. The first estimator, based on the immersion and invariance (I&I) method, determines the current demand of the DC load by measuring the boost converter's output voltage. While the second estimator, using the disturbance observer (DO) method, estimates the voltage input value by measuring the inductor's current flow. Both methods guarantee exponential convergence to the precise value of the estimated variable, irrespective of the initial estimation points. Experimental validation using varying DC loads and estimation techniques confirms the proposed IOC approach's effectiveness and robustness in regulating voltage for DC loads connected to a boost converter. Furthermore, the proposed controller is compared to the sliding mode control and presents a better performance with a more straightforward design, and the stability in closed-loop ensured.INDEX TERMS Inverse optimal control, sensorless control design, output voltage regulation, unknown DC load, disturbance observer estimator. NOMENCLATURE zVector that contains all the state variables. f (z) Vector of the soft nonlinear functions of the states.The associate editor coordinating the review of this manuscript and approving it for publication was Yinliang Xu .

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Section: Sensorless Designmentioning

confidence: 99%

A Sensorless Inverse Optimal Control Plus Integral Action to Regulate the Output Voltage in a Boost Converter Supplying an Unknown DC Load

et al. 2023

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“…Finally, according to Proposition 1, the restriction (30) is always fulfilled as long as the previously defined uncertainty u s ∈ (0, 1). Conversely, if the latter does not hold, evidently, there does not exists a controller u sw that, in closed-loop with the system in (24), ensures that the voltage position error e v converges to zero.…”

Section: A the σ-∆ Modulatormentioning

confidence: 99%

“…In [23], the maximum power from a photovoltaic array is obtained, taking into account input constraints of a boost DC-DC converter. In [24] and [25], observers for a saturated control law were analyzed in order to regulate the output voltage of a boost power converter.…”

Section: Introductionmentioning

confidence: 99%

PI-Type Controllers and Σ–Δ Modulation for Saturated DC-DC Buck Power Converters

et al. 2021

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Departing from analyzing a general input-saturated second-order system, a Lyapunov-based constructive procedure for the output-feedback stabilization of the constantly perturbed DC-DC buck power converter is presented. The proposed scheme also incorporates a Σ-∆ modulator. The obtained control scheme is developed in two parts: a proportional-integral-type family of algorithms devoted to regulating the uncertain system by using measurements of the output voltage and a Σ-∆ modulator dedicated to transforming the control action into a {0, 1} discrete-valued signal. This modulator is a kind of a sliding controller, which can be seen as a subsystem with an on-off output. This combination, the PI-type family of controllers and the Σ-∆ modulator, assures the global stability of the closed-loop system, even if parametric uncertainties are presented. The convergence analysis was carried out using Lyapunov's method. The theoretical results are confirmed using real-time experimental tests, which demonstrate the anti-windup scheme and the Σ-∆ modulator efficiency. The experiments consider the saturation of the control input and disturbances, having obtained convincing results. INDEX TERMS DC-DC buck converter; Lyapunov's method; saturation control; Σ-∆ modulator; experimental results Recently, efficient control strategies have been designed for several types of power converters. A discontinuous con

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“…Therefore, the capacitor voltage is convergent to the desired voltage Vd. Some nonlinear control approaches of the boost and buck converter were described in [21]- [27]. [23] presented a statefeedback linearization control for output voltage regulation of a DC-DC boost converter with a constant power load.…”

Section: Introductionmentioning

confidence: 99%

A Passivity-based Control Combined with Sliding Mode Control for a DC-DC Boost Power Converter

Huynh,

Duong,

Nguyen

2023

Journal of Robotics and Control

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In this paper, a passivity-based control combined with sliding mode control for a DC-DC boost power converter is proposed. Moreover, a passivity-based control for a DC-DC boost power converter is also proposed. Using a co-ordinate transformation of state variables and control input, a DC-DC boost power converter is passive. A new plant is zero-state observable and the equilibrium point at origin of this plant is asymptotically stable. Then, a passivity-based control is applied to this plant such that the capacitor voltage is equal to the desired voltage. Additionally, the sliding mode control law is chosen such that the derivative of Lyapunov function is negative semidefinite. Finally, a passivity-based control combined with sliding mode control law is applied to this plant such that the capacitor voltage is equal to the desired voltage. The simulation results of the passivity-based control, the sliding mode control and the passivity-based control combined with sliding mode control demonstrate the effectiveness and show that the capacitor voltage is kept at the desired voltage when the desired voltage, the input voltage E and the load resistor R are changed. The results show that compared with the passivity-based control, the passivity-based control combined with sliding mode control has better performance such as shorter settling time, 8.5 ms when R changes and it has smaller steady-state error, which is indicated by the value of integral absolute error (IAE), 0.0679 when the desired voltage changes. The paper has limitations such as the assumed circuit parameters.

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An immersion and invariance based input voltage and resistive load observer for DC–DC boost converter

Cited by 9 publications

References 31 publications

A Sensorless Inverse Optimal Control Plus Integral Action to Regulate the Output Voltage in a Boost Converter Supplying an Unknown DC Load

A Sensorless Inverse Optimal Control Plus Integral Action to Regulate the Output Voltage in a Boost Converter Supplying an Unknown DC Load

PI-Type Controllers and Σ–Δ Modulation for Saturated DC-DC Buck Power Converters

A Passivity-based Control Combined with Sliding Mode Control for a DC-DC Boost Power Converter

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