Articoli di riviste: "DC robustness"

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Elvin Yusubov, Elvin Yusubov. "ROBUSTNESS AND CONTROL ISSUES OF DC MICROGRIDS". PAHTEI-Procedings of Azerbaijan High Technical Educational Institutions 47, n. 12 (20 dicembre 2024): 29–39. https://doi.org/10.36962/pahtei47122024-03.

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DC microgrids have a number of advantages compared to traditional AC systems, including enhanced stability, better integration of renewable energy sources, and improved reliability. However, there are many challenges in DC microgrids that must be solved before the wide adoption of their use. This article focuses on the key problems associated with DC microgrids, including voltage stability, fault management, and power quality. Besides, a number of control strategies and technologies are developed to enhance the performance of DC microgrids. Keywords: Information measurement system, DC-DC converters, DC microgrid, measurements in microgrids.

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Leung, F. H. F., H. K. Lam, T. H. Lee e P. K. S. Tam. "Fuzzy control of DC-DC switching converters: stability and robustness analysis". Australian Journal of Electrical and Electronics Engineering 4, n. 1 (gennaio 2008): 91–100. http://dx.doi.org/10.1080/1448837x.2008.11464176.

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Jiao, Junsheng, e Xueying Cui. "Robustness Analysis of Sliding Mode on DC/DC for Fuel Cell Vehicle". Journal of Engineering Science and Technology Review 6, n. 5 (dicembre 2013): 1–6. http://dx.doi.org/10.25103/jestr.065.01.

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Ba, Qin, e Ketan Savla. "Robustness of DC Networks With Controllable Link Weights". IEEE Transactions on Control of Network Systems 5, n. 3 (settembre 2018): 1479–91. http://dx.doi.org/10.1109/tcns.2017.2724842.

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Mosskull, Henrik. "Performance and robustness evaluation of dc-link stabilization". Control Engineering Practice 44 (novembre 2015): 104–16. http://dx.doi.org/10.1016/j.conengprac.2015.06.011.

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Bensaada, M., S. Della Krachai e F. Metehri. "Proposed Fuzzy Logic Controller for Buck DC-DC Converter". International Journal of Fuzzy Systems and Advanced Applications 7 (5 febbraio 2021): 24–28. http://dx.doi.org/10.46300/91017.2020.7.5.

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This paper provides the design for buck DC-DC converter system using fuzzy logic as well as sliding mode method. Design of fuzzy logic controller will be based on improvement of imperfection of the sliding mode controller, in particular the robustness and response time of the system. The simulation results of both systems using fuzzy logic and sliding mode are shown as well as compared to signify better of the two.

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Korompili, Asimenia, e Antonello Monti. "Review of Modern Control Technologies for Voltage Regulation in DC/DC Converters of DC Microgrids". Energies 16, n. 12 (7 giugno 2023): 4563. http://dx.doi.org/10.3390/en16124563.

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This paper provides an overview of modern feedback control methods for the voltage regulation in DC/DC converters of DC microgrids. Control objectives and practical restrictions are defined and used as indicators for the analysis and performance assessment of the control methods. After presenting the concept of each control method, the advantages and limitations in the converter applications are discussed. The main conclusions of this overview can be used as recommendations for the selection of the suitable control method according to the control requirements in the DC microgrid. The low robustness against disturbances is a major issue in all control methods. For the enhancement of the robustness of the feedback control methods, three approaches are reviewed. Applications of these approaches in DC/DC converters are compared with regard to the achieved disturbance rejection and the related cost of nominal performance degradation. The disturbance/uncertainty estimation and attenuation (DUEA) framework appears to be the most promising approach to compromising these opposing control objectives. This overview is presented for a general DC/DC converter, without any additional control design requirement imposed by a specific converter plant. This allows the generalisation of the conclusions of the performance assessment, which can facilitate the application of the control methods in similar systems, such as in AC/DC converters or motor drives.

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Wu, Yu, Du e Shi. "Feedforward-Double Feedback Control System of Dual-Switch Boost DC/DC Converters for Fuel Cell Vehicles". Energies 12, n. 15 (26 luglio 2019): 2886. http://dx.doi.org/10.3390/en12152886.

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DC/DC converters for fuel cell electric vehicles need not only high boost ratio and high efficiency, but also strong anti-jamming capability. Therefore, it is especially important to devise a control method with strong robustness under the premise of an appropriate topology. In this paper, a simple dual-switch boost converter topology is adopted. We use the state space averaging method to build a small signal model, and based on this model, we propose a feedforward-double feedback control system for continuous conduction mode (CCM) mode. Simulation and experimental results show that the proposed feedforward-double feedback control system improves the robustness of the system while ensuring a high boost ratio and efficiency, and solves the problem of weak output characteristics of fuel cells. The control effect is similar to the sliding mode control, which is known for its robustness, while the rise time of step response is only 1/10 of that of the voltage feedback control system. When the output voltage of the DC/DC converter is 55 V, the DC/DC converter using feedforward-double feedback control system is more robust than the voltage feedback control system under sudden change of load.

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Alarcón-Carbajal, Martin A., José E. Carvajal-Rubio, Juan D. Sánchez-Torres, David E. Castro-Palazuelos e Guillermo J. Rubio-Astorga. "An Output Feedback Discrete-Time Controller for the DC-DC Buck Converter". Energies 15, n. 14 (21 luglio 2022): 5288. http://dx.doi.org/10.3390/en15145288.

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This paper presents a discrete-time output feedback controller to regulate the output voltage of a DC-DC buck converter. The proposal’s main feature is the application of a discrete-time equivalent of the robust exact filtering differentiator. First, the document exposes a theoretical analysis of the closed-loop system, where it is considered the problem of implementing a real-time differentiator with a good relationship between exactness and noise filtration performance. Hence, secondly, the controller in a laboratory setup is presented. The first experimental results suggest that the proposed controller exhibits good robustness against noise and maintains the asymptotic accuracy, even with saturated control inputs, as in the case of the DC-DC buck converter. Consequently, aiming to verify the features of the proposed method, the controller is validated through multiple experiments, showing satisfactory voltage tracking accuracy, good suppression of instantaneous load and supply voltage disturbances, and robustness against bounded measurement noise.

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Oucheriah, Said, e Abul Azad. "Current-sensorless robust sliding mode control for the DC-DC boost converter". AIMS Electronics and Electrical Engineering 9, n. 1 (2025): 46–59. https://doi.org/10.3934/electreng.2025003.

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<p>A current-sensorless PWM-based robust sliding mode controller is proposed for the DC-DC Boost Converter, a nonminimum phase system that presents major challenges in the design of stabilizing controllers. The development of the controller requires the measurement of the output voltage and the estimation of its derivative. An extended state observer is developed to estimate a lumped uncertainty that comprises the uncertain load and input voltage, the converter parasitics, and the component uncertainties, and also to estimate the derivative of the output voltage. A linear sliding surface is used to derive the controller that is simple in its design and yet exhibits excellent features in terms of robustness to external disturbances, parameter uncertainties, and parasitics, despite the absence of the inductor current feedback. Also, a simple procedure to select the controller gains is outlined. The robustness of the controller is validated by computer simulations.</p>

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Mitic, Darko, Dragan Antic, Marko Milojkovic, Sasa Nikolic e Stanisa Peric. "Input-output based quasi-sliding mode control of DC-DC converter". Facta universitatis - series: Electronics and Energetics 25, n. 1 (2012): 69–80. http://dx.doi.org/10.2298/fuee1201069m.

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The paper presents the design of discrete-time quasi-sliding mode voltage controller for DC-DC buck converter. The control algorithm is realized by measuring only sensed output voltage. No current measurements and time derivatives of output voltage are necessary. The proposed quasi-sliding mode controller provides stable output voltage, exhibiting robustness to parameter and load variations.

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Olivares, Daniel, Gerardo Romero, Jose A. Guerrero e Rogelio Lozano. "Robustness Analysis for Multi-Agent Consensus Systems with Application to DC Motor Synchronization". Applied Sciences 10, n. 18 (18 settembre 2020): 6521. http://dx.doi.org/10.3390/app10186521.

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DC motor speed synchronization is a critical problem in industrial and robotic applications. To tackle this problem, we propose to use a multi-agent consensus-based control scheme that guarantees the convergence of the DC motor speeds to either fixed or time-varying reference. A detailed robustness analysis considering parametric uncertainty and time delay in the multi-agent system is performed to guarantee the consensus on the speed of DC motors in actual practice. The results obtained concerning the robustness analysis allowed us to implement experimental tests on a three-motor system using a wireless communication system to achieve satisfactory performance.

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M., Manogna, Amarendra Reddy B. e Padma Kottala. "Impact of Weight Functions on Performance of Three-Input Integrated Dc-Dc Converter in H ∞ Control". WSEAS TRANSACTIONS ON SYSTEMS AND CONTROL 19 (11 aprile 2024): 62–72. http://dx.doi.org/10.37394/23203.2024.19.7.

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Many power electronic systems applications namely locomotives, hybrid electric vehicles, and all renewable energy sourced systems are shifting towards Multi-Input Multi-Output (MIMO) integrated DC-DC converters due to their reliability and flexible nature. Designing controllers for MIMO integrated DC-DC converter is complicated due to its integrated structure, presence of common elements, and interactions between the input and output variables of the converter. In this work, a Three-Input Integrated DC-DC (TIID) converter is modeled using state-space analysis, and a Transfer Function Matrix (TFM) is acquired from the small signal continuous time model. A robust controller based on the loop shaping method is designed for the TIID converter. In this loop-shaping method, the desired robustness and the performance of the controller are represented with weight functions i.e., loop-shaping filters. These weight functions are designed using TFM and are frequency-dependent. The robustness of the controller depends on the weight function parameters. The effect of varying the parameters of the weight functions on system dynamics, robustness, and performance are studied and plotted. TIID converter of 288 W, 24V-30V-36V to 48 V is considered and the impact of weight function on closed-loop system dynamics and sensitivity characteristics under varying parameter conditions are analyzed in MATLAB Environment.

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Cherdintsev, A. A., A. V. Shagin e S. A. Lupin. "Modified Predictive Control System of the DC-DC Boost Converter". Proceedings of Universities. Electronics 26, n. 6 (dicembre 2021): 533–46. http://dx.doi.org/10.24151/1561-5405-2021-26-6-533-546.

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Nowadays, predictive control systems are becoming more and more popular, which significantly reduce the cost of setting up converters. However, DC-DC converter control problem persists. In this work, a modified model of the predictive control system (MPCS) for step-up DC-DC converters is presented. For its implementation, a nonlinear model of a converter with discrete time switching was derived, which describe a continuous conduction mode of operation. The synthesis of the controller was achieved by formulating the objective function that should be minimized considering the dynamic model of the converter. The proposed predictive control strategy, used as a voltage control system, allows keeping the output voltage at the reference level. The modified system for calculating the objective function makes it possible to significantly reduce the required computing power and expand the prediction horizon. The results of modeling have been presented that demonstrate the advantages of the proposed control method: a fast transient response and a high degree of robustness.

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Duranay, Z. B., H. Guldemir e S. Tuncer. "Fuzzy Sliding Mode Control of DC-DC Boost Converter". Engineering, Technology & Applied Science Research 8, n. 3 (19 giugno 2018): 3054–59. http://dx.doi.org/10.48084/etasr.2116.

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A sliding mode fuzzy control method which combines sliding mode and fuzzy logic control for DC-DC boost converter is designed to achieve robustness and better performance. A fuzzy sliding mode controller in which sliding surface whose reference is obtained from the output of the outer voltage loop is used to control the inductor current. A linear PI controller is used for the outer voltage loop. The control system is simulated using Matlab/Simulink. The simulation results are presented for input voltage and load variations. Simulated results are given to show the effectiveness of the control system.

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Cham, Julius Derghe, Francis Lénine Djanna Koffi, Alexandre Teplaira Boum e Ambe Harrison. "Robust adaptive sliding mode control of a bidirectional DC-DC converter feeding a resistive and CPL based on PSO". International Journal of Power Electronics and Drive Systems (IJPEDS) 15, n. 4 (1 dicembre 2024): 2397. http://dx.doi.org/10.11591/ijpeds.v15.i4.pp2397-2408.

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A DC-DC converter functioning in bidirectional (two-way) mode is a crucial component of direct current (DC) microgrids since it allows electricity to flow in both directions. However, because of load changes and other factors, the DC-bus voltage might become unstable. This research proposes a robust adaptive controller for a half-bridge two-way DC-DC converter founded on particle swarm optimization (PSO). Using a DC-DC half-bridge bidirectional converter, the effectiveness of various conventional and proposed control techniques is investigated. In comparison to a conventional sliding mode controller (CSMC), it is found that a PSO-based sliding mode control with an adaptive law is the optimal control approach for a bidirectional half-bridge DC-DC converter. This is because minimal steady-state error and the shortest rising and settling times are guaranteed. The benefits of robustness, chattering reduction, and simple design are combined in the suggested controller, which is especially beneficial when dealing with load and input voltage changes. The controller ensures robustness and stability in the face of parameter changes. Numerical simulations conducted in a MATLAB-Simulink environment on a DC-DC half-bridge converter operating in bidirectional mode show the controller's improved performance over its existing counterpart.

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Hernández-Márquez, Eduardo, José Rafael García-Sánchez, Ramón Silva-Ortigoza, Mayra Antonio-Cruz, Victor Manuel Hernández-Guzmán, Hind Taud e Mariana Marcelino-Aranda. "Bidirectional Tracking Robust Controls for a DC/DC Buck Converter-DC Motor System". Complexity 2018 (23 agosto 2018): 1–10. http://dx.doi.org/10.1155/2018/1260743.

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Two differential flatness-based bidirectional tracking robust controls for a DC/DC Buck converter-DC motor system are designed. To achieve such a bidirectional tracking, an inverter is used in the system. First control considers the complete dynamics of the system, that is, it considers the DC/DC Buck converter-inverter-DC motor connection as a whole. Whereas the second separates the dynamics of the Buck converter from the one of the inverter-DC motor, so that a hierarchical controller is generated. The experimental implementation of both controls is performed via MATLAB-Simulink and a DS1104 board in a built prototype of the DC/DC Buck converter-inverter-DC motor connection. Controls show a good performance even when system parameters are subjected to abrupt uncertainties. Thus, robustness of such controls is verified.

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Ma, Rui, Liangcai Xu, Renyou Xie, Dongdong Zhao, Yigeng Huangfu e Fei Gao. "Advanced Robustness Control of DC–DC Converter for Proton Exchange Membrane Fuel Cell Applications". IEEE Transactions on Industry Applications 55, n. 6 (novembre 2019): 6389–400. http://dx.doi.org/10.1109/tia.2019.2935981.

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Linares-Flores, Jesús, Fernando Navarro Martínez, Arturo Hernández Méndez, José Antonio Juárez-Abad e Juan Javier Montesinos-García. "Decentralized passivity-based control for cooperative power modules in the DC Microgrid System". Memorias del Congreso Nacional de Control Automático 7, n. 1 (27 dicembre 2024): 191–95. https://doi.org/10.58571/cnca.amca.2024.033.

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This article deals with the decentralized passivity-based controller (PBC) design for the power modules DC/DC and AC/DC connected to a DC microgrid. The DC power modules use buck and boost topologies, while the AC/DC rectifier employs the boost topology. Linear extended state observers are used to estimate the load current demand by the DC microgrid. Thus, the power modules get equitable contribution and synchronization. The PSIM simulation results show the effectiveness and robustness of the decentralized passivity-based controllers of the power modules for the DC microgrid system.

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Park, Jong Hyeon, e You Moo Kim. "Time-Delay Sliding Mode Control for a Servo". Journal of Dynamic Systems, Measurement, and Control 121, n. 1 (1 marzo 1999): 143–48. http://dx.doi.org/10.1115/1.2802434.

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In this paper, a new control algorithm called the time-delay sliding mode control (TDSMC), based on the time delay control (TDC) and the integral sliding mode control (SMC), is proposed and applied for controlling DC servos with a seal installed on their rotating axes. This algorithm adopts the robustness of sliding model control and improves the robustness of the TDC. The results of a series of experiments on a DC servo motor system with stick-slip friction show TDSMC is compatable with the TDC in the nominal performance, but is superior to the TDC and the PID control in the performance robustness. Settling time is used as a measure of the performance.

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Balsamo, Flavio, Davide Lauria e Fabio Mottola. "Design and Control of Coupled Inductor DC–DC Converters for MVDC Ship Power Systems". Energies 12, n. 4 (24 febbraio 2019): 751. http://dx.doi.org/10.3390/en12040751.

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This paper deals with the design and control aspects of modern ship power systems within the paradigm of an all-electric ship. The widespread use of power electronic converters is central in this context due to the technological advances in automation systems and the integration of the electrical propulsion systems and other components, such as electrical energy storage systems and renewable energy sources. The issue to address in this scenario is related to the request of increased performances in dynamic operation while pursuing advantages in terms of energy savings and overall system security. In addition, the presence of large load changes requires providing robustness of the control in terms of system stability. This paper is focused on medium voltage direct current (MVDC) ship power systems and the design and control of coupled inductor DC–DC converters. The load is handled in terms of a constant power model, which generally is considered the most critical case for testing the stability of the system. The robustness of the design procedure, which is verified numerically against large and rapid load variations, allowed us to confirm the feasibility and the attractiveness of the design and the control proposal.

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Padilla-Medina, Alfredo, Francisco Perez-Pinal, Alonso Jimenez-Garibay, Antonio Vazquez-Lopez e Juan Martinez-Nolasco. "Design and Implementation of an Energy-Management System for a Grid-Connected Residential DC Microgrid". Energies 13, n. 16 (6 agosto 2020): 4074. http://dx.doi.org/10.3390/en13164074.

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The design and implementation of an energy-management system (EMS) applied to a residential direct current microgrid (DC-µG) is presented in this work. The proposed residential DC-µG is designed to provide a maximum power of one kilowatt by using two photovoltaic arrays (PAs) of 500 W, a battery bank (BB) of 120 V–115 Ah, a supercapacitor module of 0.230 F and a bidirectional DC–AC converter linked to the AC main grid (MG). The EMS works as a centralized manager and it defines the working operation mode for each section of the DC-µG. The operation modes are based on: (1) the DC-link bus voltage, (2) the generated or demanded power to each section of the DC-µG and (3) the BB’s state of charge. The proposed EMS—during the several working operation modes and at the same time—can obtain the maximum energy from the PAs, reduce the energy consumption from the main grid and keep the DC-link bus voltage inside a range of 190 V ± 5%. The EMS and local controllers are implemented by using LabVIEW and NI myRIO-1900 platforms. Moreover, experimental results during connection and disconnection of each DC-µG sections and different on-the-fly transitions are reported, these results focus on the behavior of the DC bus, which shows the DC bus robustness and stability. The robustness of the DC-µG is demonstrated by maintaining a balance of energy between the sources and loads connected to the DC bus under different scenarios.

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Amieur, T., D. Taibi, S. Kahla, M. Bechouat e M. Sedraoui. "Tilt-fractional order proportional integral derivative control for DC motor using particle swarm optimization". Electrical Engineering & Electromechanics, n. 2 (5 marzo 2023): 14–19. http://dx.doi.org/10.20998/2074-272x.2023.2.03.

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Introduction. Recently, the most desired goal in DC motor control is to achieve a good robustness and tracking dynamic of the set-point reference speed of the feedback control system. Problem. The used model should be as general as possible and consistently represent systems heterogeneous (which may contain electrical, mechanical, thermal, magnetic and so on). Goal. In this paper, the robust tilt-fractional order proportional integral derivative control is proposed. The objective is to optimize the controller parameters from solving the criterion integral time absolute error by particle swarm optimization. The control strategy is applied on DC motor to validate the efficiency of the proposed idea. Methods. The proposed control technique is applied on DC motor where its dynamic behavior is modeled by external disturbances and measurement noises. Novelty. The proposed control strategy, the synthesized robust tilt-fractional order proportional integral derivative speed controller is applied on the DC motor. Their performance and robustness are compared to those provided by a proportional integral derivative and fractional order proportional integral derivative controllers. Results. This comparison reveals superiority of the proposed robust tilt-fractional order proportional integral derivative speed controller over the remaining controllers in terms of robustness and tracking dynamic of the set-point reference speed with reduced control energy.

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Nady, Soukaina, Hassan El Fadil, Abdellah Lassioui, Yassine El Asri e Anwar Hasni. "High-Gain Observer in Fuel Cell and Cascaded DC-DC Boost Converter System". E3S Web of Conferences 601 (2025): 00062. https://doi.org/10.1051/e3sconf/202560100062.

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In this study, we propose using a high-gain observer (HGO) in fuel cell systems and the FC-cascade boost converter to achieve precise state estimation and improve control accuracy. The HGO offers significant advantages, including robustness to disturbances, simplicity of design, and reduced dependency on costly sensors, thereby enhancing system performance and reducing operational costs. Our results demonstrate the superior accuracy and reliability of this approach, confirming its potential as a promising solution for fuel cell applications.

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Mansouri, Amirhosein, Roghayeh Gavagsaz-Ghoachani, Matheepot Phattanasak e Serge Pierfederici. "Nonlinear Cascaded Control for a DC-DC Boost Converter". Journal of Robotics and Control (JRC) 4, n. 4 (7 agosto 2023): 521–36. http://dx.doi.org/10.18196/jrc.v4i4.18932.

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The Boost Converter is a type of DC-DC converter that operates using switching techniques and is designed to elevate the voltage level. This paper presents a cascaded control for a boost converter to ensure that the inductor current and output capacitor voltage remain in a safe operating zone. Ensuring safe operating conditions and stable closed-loop poles is crucial because it guarantees that both current and voltage remain within the designated operating range. This preventive measure prevents any damage to components like capacitors (C), inductors (L), and switches. Unstable operation, on the other hand, could lead to oscillations and an undesirable increase in the amplitude of current and voltage, posing a risk to all components involved. The research contribution involves an investigation of cascaded control, utilizing power and energy concepts due to their advantageous effects on system performance and design. By implementing nonlinear controllers based on a large-signal averaged model, the closed-loop poles remain independent of operating points, eliminating the need for small-signal linearization. Small-signal linearization makes the controlled system dependent on the operating point. Two controllers are introduced based on power and energy concept, which is easy to understand. The potential practical application of the proposed cascaded control approach is in high-power applications. Tracking the energy stored in the output capacitor is first investigated to validate the proposed control scheme by varying the output voltage reference from 32 V to 50 V. Then, the regulation of the energy voltage is explored by varying the load resistance for the output voltage at 50 V. Both are done using a switched model using MATLAB/Simulink software. Simulation results are given to demonstrate the effectiveness of the proposed method. The key metrics used to assess the effectiveness of the proposed control scheme are the undershoot voltage and robustness. The results show that the studied system's tracking, regulating operations and robustness properties are as expected. The proposed method faces a challenge with the number of sensors required. To address this, observers can be utilized to reduce sensor usage while maintaining measurement accuracy. The proposed method can be applied to other power electronic systems.

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Le, Hoai Minh, Hoai An Le Thi, Tao Pham Dinh e Van Ngai Huynh. "Block Clustering Based on Difference of Convex Functions (DC) Programming and DC Algorithms". Neural Computation 25, n. 10 (ottobre 2013): 2776–807. http://dx.doi.org/10.1162/neco_a_00490.

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We investigate difference of convex functions (DC) programming and the DC algorithm (DCA) to solve the block clustering problem in the continuous framework, which traditionally requires solving a hard combinatorial optimization problem. DC reformulation techniques and exact penalty in DC programming are developed to build an appropriate equivalent DC program of the block clustering problem. They lead to an elegant and explicit DCA scheme for the resulting DC program. Computational experiments show the robustness and efficiency of the proposed algorithm and its superiority over standard algorithms such as two-mode K-means, two-mode fuzzy clustering, and block classification EM.

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IDA, Shinya, e Satoru SAKAI. "C306 Casimir based Impedance control for DC motors : Robustness Analysis". Proceedings of the Symposium on the Motion and Vibration Control 2011.12 (2011): 586–89. http://dx.doi.org/10.1299/jsmemovic.2011.12.586.

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Massaoudi, Yosra. "A new Backstepping Sliding Mode Controller applied to a DC-DC Boost Converter". International Journal of Power Electronics and Drive Systems (IJPEDS) 7, n. 3 (1 settembre 2016): 759. http://dx.doi.org/10.11591/ijpeds.v7.i3.pp759-768.

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<pre>In order to deal with the boost converter non minimum phase property and to solve the Sliding Mode Control (SMC) major problem (the chattering phenomenon), a new backstepping Sliding Mode Controller is developed. In this paper, a comparative study between the proposed controller and the (2-SMC)super twisting and the classical SMC is provided in order to evaluate each controller. Simulations and experimental results show the effectiveness and the robustness of the proposed controller with respect to load variation. </pre>

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Jia, Yifan, Dazhi Wang, Guofeng Sun, Yongliang Ni, Keling Song e Yanming Li. "High-Order Sliding-Mode Control Strategy for Improving Robustness of Three-Phase Interleaved Bidirectional Converter". Sustainability 15, n. 12 (18 giugno 2023): 9720. http://dx.doi.org/10.3390/su15129720.

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In response to the era background of “comprehensive electrification” and “dual carbon plan” of electric vehicles, DC/DC converters have a good performance in terms of weight, volume, and efficiency and are widely used in fields such as solar power generation, UPS, communication, computers, and electric vehicles. At present, the DC bus voltage is an important indicator for measuring the safe and stable operation of high-voltage DC power systems in electric vehicles. Therefore, regulating the stability of bus voltage through converters has good economic benefits for the sustainable development of electric vehicles in terms of maintenance costs and effective energy management. In order to solve the problem of bus voltage resonance instability caused by negative impedance characteristics of constant power load in an electric vehicle DC power system, a sliding-mode control design strategy of three-phase interleaved bidirectional converter under constant power load was proposed. Firstly, a GPI observer was designed to estimate the state and concentrated disturbances of the system. Then, the estimated value was introduced into the controller for feedforward compensation, thereby achieving fast-tracking of the output voltage to the reference voltage. Finally, the simulation results show that the controller can effectively maintain the influence of disturbances and better improve tracking characteristics and robustness to disturbances and uncertainties.

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Ablay, Günyaz, e Yakup Eroğlu. "Integral Sliding Mode Control of DC Servo-Driven Conveyor System". Applied Mechanics and Materials 799-800 (ottobre 2015): 1177–82. http://dx.doi.org/10.4028/www.scientific.net/amm.799-800.1177.

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DC servo systems which are utilized in many industries require efficient and robust control strategies for achieving specific duties accurately. An integral sliding mode control (ISMC) is designed for position control of DC servo-driven conveyor system in this work. The ISMC which maintains the robustness, linearization and systematic design procedure of the conventional sliding modes is aimed to solve robust position control problem under load uncertainties. Performance and robustness of the ISMC are compared with the PID controller. Numerical and experimental results are presented to demonstrate the validity, feasibility and effectiveness of the designed control technique.

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Mobayen, Saleh, Farhad Bayat, Chun-Chi Lai, Asghar Taheri e Afef Fekih. "Adaptive Global Sliding Mode Controller Design for Perturbed DC-DC Buck Converters". Energies 14, n. 5 (25 febbraio 2021): 1249. http://dx.doi.org/10.3390/en14051249.

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Abstract (sommario):

This paper proposes a novel adaptive intelligent global sliding mode control for the tracking control of a DC-DC buck converter with time-varying uncertainties/disturbances. The proposed control law is formulated using a switching surface that eliminates the reaching phase and ensures the existence of the sliding action from the start. The control law is derived based on the Lyapunov stability theory. The effectiveness of the proposed approach is illustrated via high-fidelity simulations by means of Simscape simulation environment in MATLAB. Satisfactory tracking accuracy, efficient suppression of the chattering phenomenon in the control input, and high robustness against uncertainties/disturbances are among the attributes of the proposed control approach.

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32

Almawlawe, Muhanad, e Darko Mitic. "AN APPROACH TO DESIGN OF DC-DC BOOST CONVERTER WITH DIGITAL CONTROL". Facta Universitatis, Series: Automatic Control and Robotics 16, n. 3 (24 gennaio 2018): 197. http://dx.doi.org/10.22190/fuacr1703197a.

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Abstract (sommario):

This paper deals with the design of digital controller for DC-DC boost converter. This controller is a combination of a generalized minimum variance control and one-step-delayed disturbance estimator. The generalized minimum variance control algorithm design is based on the input/output converter model. It should provide the output voltage stability, whereas the disturbance estimator increases the robustness and the steady-state accuracy of converter in the presence of input voltage and load resistance variations. With these control techniques, the converter can achieve better power efficiency. Finally, the effectiveness of the proposed design procedure is verified by a digital simulation, showing satisfactory DC-DC boost converter performances.

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33

Behih, K., K. Benmahammed, Z. Bouchama e M. N. Harmas. "Real-Time Investigation of an Adaptive Fuzzy Synergetic Controller for a DC-DC Buck Converter". Engineering, Technology & Applied Science Research 9, n. 6 (1 dicembre 2019): 4984–89. http://dx.doi.org/10.48084/etasr.3172.

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Abstract (sommario):

In this paper, an adaptive fuzzy synergetic controller (AFSC) for a DC-DC converter is introduced. Two robust control techniques, synergetic control combined with fuzzy logic control, are utilized to produce a reliable DC-DC power supply. This is-realized by an indirect adaptive control of a DC-DC buck converter. To further enhance robustness, a nonlinear constraint, the equivalent of the sliding surface, is used to guarantee performance and stability for any operating condition. To ensure overall strength, closed-loop signals are bounded and the stability is guaranteed using the Lyapunov theory. Control parameters are optimized using a PSO algorithm to further enhance performances. The proposed controller (AFSC) is designed through a dSpace based experimental setup to provide robust DC-DC buck converter voltage control.

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34

Yan, Wen, Li Wei, Difu Zhan, Dan Su e Mingrui Zhang. "Robustness Analysis and Controller Design Based on a Generalized Model of Nonisolated Multiphase DC–DC Converter". IEEE Access 10 (2022): 14846–56. http://dx.doi.org/10.1109/access.2022.3147382.

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35

Babes, Badreddine, Noureddine Hamouda, Fahad Albalawi, Oualid Aissa, Sherif S. M. Ghoneim e Saad A. Mohamed Abdelwahab. "Experimental Investigation of an Adaptive Fuzzy-Neural Fast Terminal Synergetic Controller for Buck DC/DC Converters". Sustainability 14, n. 13 (29 giugno 2022): 7967. http://dx.doi.org/10.3390/su14137967.

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Abstract (sommario):

This study proposes a way of designing a reliable voltage controller for buck DC/DC converter in which the terminal attractor approach is combined with an enhanced reaching law-based Fast Terminal Synergetic Controller (FTSC). The proposed scheme will overcome the chattering phenomena constraint of existing Sliding Mode Controllers (SMCs) and the issue related to the indefinite time convergence of traditional Synergetic Controllers (SCs). In this approach, the FTSC algorithm will ensure the proper tracking of the voltage while the enhanced reaching law will guarantee finite-time convergence. A Fuzzy Neural Network (FNN) structure is exploited here to approximate the unknown converter nonlinear dynamics due to changes in the input voltage and loads. The Fuzzy Neural Network (FNN) weights are adjusted according to the adaptive law in real-time to respond to changes in system uncertainties, enhancing the increasing the system’s robustness. The applicability of the proposed controller, i.e., the Adaptive Fuzzy-Neural Fast Terminal Synergetic Controller (AFN-FTSC), is evaluated through comprehensive analyses in real-time platforms, along with rigorous comparative studies with an existing FTSC. A dSPACE ds1103 platform is used for the implementation of the proposed scheme. All results confirm fast reference tracking capability with low overshoots and robustness against disturbances while comparing with the FTSC.

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36

Silva-Ortigoza, R., C. Márquez-Sánchez, F. Carrizosa-Corral, M. Antonio-Cruz, J. M. Alba-Martínez e G. Saldaña-González. "Hierarchical Velocity Control Based on Differential Flatness for a DC/DC Buck Converter-DC Motor System". Mathematical Problems in Engineering 2014 (2014): 1–12. http://dx.doi.org/10.1155/2014/912815.

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Abstract (sommario):

This paper presents a hierarchical controller that carries out the angular velocity trajectory tracking task for a DC motor driven by a DC/DC Buck converter. The high level control is related to the DC motor and the low level control is dedicated to the DC/DC Buck converter; both controls are designed via differential flatness. The high level control provides a desired voltage profile for the DC motor to achieve the tracking of a desired angular velocity trajectory. Then, a low level control is designed to ensure that the output voltage of the DC/DC Buck converter tracks the voltage profile imposed by the high level control. In order to experimentally verify the hierarchical controller performance, a DS1104 electronic board from dSPACE and Matlab-Simulink are used. The switched implementation of the hierarchical average controller is accomplished by means of pulse width modulation. Experimental results of the hierarchical controller for the velocity trajectory tracking task show good performance and robustness against the uncertainties associated with different system parameters.

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37

Erenturk, Koksal, Azeddine Draou e Abdulrahman AlKassem. "Design and Comparison of Different Types of Synergetic Controllers for Islanded DC Microgrids". Sustainability 14, n. 14 (18 luglio 2022): 8792. http://dx.doi.org/10.3390/su14148792.

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Abstract (sommario):

In this paper, different types of synergetic controllers (SCs), such as simple SC, piecewise linear function form of SC, linear synergetic controller, improved synergetic controller with terminal SC, and fast terminal SC have been designed and applied to an islanded DC microgrid. To be able to make the design of the controllers independent from system component values, a generalized mathematical method has been derived for all power electronics-based subsystems of the microgrid system. A small-scale DC microgrid has been designed and implemented to verify experimentally the robustness of the control law from the different synergetic controllers. Moreover, a generalized synergetic controller design approach has been derived in this paper for the islanded DC microgrids. The obtained results from both simulation and experiment tests have been compared and included in this paper. It is concluded that definition of macro variables is affecting robustness and tracking performance of the designed controllers.

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38

Boi, Mauro, Rosa Anna Mastromauro, Andrea Floris e Alfonso Damiano. "Integration of Sodium Metal Halide Energy Storage Systems in Telecommunication Microgrids: Performance Analysis of DC-DC Converter Topologies". Energies 16, n. 5 (23 febbraio 2023): 2169. http://dx.doi.org/10.3390/en16052169.

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Abstract (sommario):

The present paper proposes an integrated method for modelling and designing Energy Storage Systems (ESSs) based on Sodium Metal Halide Batteries (SMHBs). The implementation of the proposed methodology for designing an SMHB-ESS used for supporting telecommunication DC microgrids is presented. The motivation concerning this specific case study is the role assumed by battery technology in improving the reliability and robustness of telecommunication DC microgrids. In this context, the SMHBs, due to their operative temperature, dynamic power response and robustness against cell breakdown, represent one of the most suitable technologies, mainly when challenging environmental conditions occur. The motivation for implementing an integrated design approach is the non-linear behaviour of SMHBs, which requires a high accuracy in battery modelling and in managing DC-DC interfacing for full SMHB capacity exploitation. To highlight the advantages of this novel approach, a comparison between the SMHB- ESS designs considering, as the DC-DC converter, a buck–boost topology actually implemented in the commercial systems and a Dual-Active-Bridge (DAB) converter, specifically developed for this kind of battery, was investigated. Considering different operating conditions in a specific DC telecommunication microgrid, the designed configurations of SMHB ESSs were simulated. Finally, a comparison of simulation results is presented and discussed, highlighting that DABs, despite their greater complexity compared to buck–boost converters, present advantages in terms of flexibility, dynamic performances and efficiency, increasing the available SMHB capacity by 10%.

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39

Mary, Ali Hussien, Abbas Hussien Miry e Mohammed Hussein Miry. "System uncertainties estimation based adaptive robust backstepping control for DC DC buck converter". International Journal of Electrical and Computer Engineering (IJECE) 11, n. 1 (1 febbraio 2021): 347. http://dx.doi.org/10.11591/ijece.v11i1.pp347-355.

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Abstract (sommario):

This paper proposed a novel adaptive robust backstepping control scheme for DC-DC buck converter subjected to external disturbance and system uncertainty. Uncertainty in the load resistance and the input voltage represent the big challenge in buck converter control. In this work, an adaptive estimator for matched and mismatched uncertainties based backstepping control is applied for DC-DC buck converter. The updating laws are determined based on the lyapunov theorem. Thus, the difference between the estimated parameters and actual parameters converges to zero. The proposed control method is compared with the conventional sliding mode control and integral sliding mode control. Simulation results demonstrate the effectiveness and robustness of the proposed controller.

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40

Zhou, Xi Xiang, Jia Sheng Li e Dan Guo. "Study on Genetic Neural Network Control Strategy for DC/DC Converter". Advanced Materials Research 268-270 (luglio 2011): 1921–27. http://dx.doi.org/10.4028/www.scientific.net/amr.268-270.1921.

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Abstract (sommario):

A control method based on genetic neural network is presented to deal with the nonlinear object of the high-power PS-FB-ZVS PWM DC/DC converter. The control system optimizes the initial weight of the BP neural network and PID parameters tuning on line utilizing the genetic algorithm, which directly controls the object in closed-loop and has solved the problem that the controller network initial weight coefficient influences the control effect, thus, the optimal dynamic and steady state performance of the system is ensured. In the MATLAB environment, the control systems consisting of different controllers are simulated, and the output voltage and output current waveforms are obtained when the system is loaded by experiment. The results show that the controller has strong robustness, fast response speed, and small output voltage fluctuations with load changes.

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41

Liu, Guo Liang, e Jian Feng Li. "Robustness Analysis & Design for the Driver of the DC Motor". Advanced Materials Research 538-541 (giugno 2012): 3051–54. http://dx.doi.org/10.4028/www.scientific.net/amr.538-541.3051.

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Abstract (sommario):

Abstract.For the control unit in a control system, under a certain type of perturbations, including the disturbance of its own model, the property that system maintains certain performance parameter to designed index is defined as robustness. A designed system is robust when its response does not dissatisfy design requirements under model parameter variations.In practical application, it is not unusual that some parameters of system model are not precisely known. Such parameter is defined as uncertain parameter, because its value varies within a given range, even though its nominal value and variation range are known.In this article, in order to design a robust control system, MATLAB is utilized to perform robustness analysis by establishing an uncertainty model of DC motor.

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42

Xie, Yuan. "DC Servo Motor Control Research Based on BP Neural Network PID". Advanced Materials Research 926-930 (maggio 2014): 1230–34. http://dx.doi.org/10.4028/www.scientific.net/amr.926-930.1230.

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Abstract (sommario):

This paper introduced the structure and principle of DC servo motor, , derived its transfer function; combined BP neural network with PID control to achieve a composite control arithmetic, that fully embodies advantages of strong self-adaptive, robustness of neural network and high steady-state accuracy of PID controller, which improved the performance of DC motor servo system.

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43

Huang, Juan, Jin Fang e Meng Fu. "Robust switching control of DC-DC converter under dynamic periodic event-triggered mechanism". Journal of Physics: Conference Series 2849, n. 1 (1 settembre 2024): 012028. http://dx.doi.org/10.1088/1742-6596/2849/1/012028.

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Abstract (sommario):

Abstract The stabilization of a DC-DC converter system with a switching control approach based on a dynamic periodic event-triggered mechanism is addressed in this study. The event-triggered mechanism saves communication resources and improves the control performance. Meanwhile, by considering dynamic variables, the event-triggered condition can be changed depending on the actual situation of the system, which improves the stability and robustness of the system. The comparison and analysis of various triggering strategies show that the switching control method of dynamic periodic event-triggered mechanism can ensure system performance well and effectively reduce the communication burden. Finally, an example of a boost converter is presented, which proves the feasibility of the proposed controller.

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44

Ibrahim, Oladimeji, Nor Zaihar B. Yahaya e Nordin Saad. "PID Controller Response to Set-Point Change in DC-DC Converter Control". International Journal of Power Electronics and Drive Systems (IJPEDS) 7, n. 2 (1 giugno 2016): 294. http://dx.doi.org/10.11591/ijpeds.v7.i2.pp294-302.

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Abstract (sommario):

Power converter operations and efficiency is affected by variation in supply voltage, loads current, circuit elements, ageing and temperature. To meet the objective of tight voltage regulation, power converters circuit module and the control unit must be robust to reject disturbances arising from supply, load variation and changes in circuit elements. PID controller has been the most widely used in power converter control. This paper presents studies of robustness of PID controller tuning methods to step changes in the set point and disturbance rejection in power converter control. A DC-DC boost converter was modelled using averaged state-space mothod and PID controllers were designed with five different tuning methods. The study reveals the transient response and disturbance rejection capability of each tuning methods for their suitability in power supply design applications.

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45

Changizi, Nemat, Mahbubeh Moghadas, Mohamad Reza Dastranj e Mohsen Farshad. "Design a Fuzzy Logic Based Speed Controller for DC Motor with Genetic Algorithm Optimization". Applied Mechanics and Materials 110-116 (ottobre 2011): 2324–30. http://dx.doi.org/10.4028/www.scientific.net/amm.110-116.2324.

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Abstract (sommario):

In this paper, an intelligent speed controller for DC motor is designed by combination of the fuzzy logic and genetic algorithms. First, the speed controller is designed according to fuzzy rules such that the DC drive is fundamentally robust. Then, to improve the DC drive performance, parameters of the fuzzy speed controller are optimized by using the genetic algorithm. Simulation works in MATLAB environment demonstrate that the genetic optimized fuzzy speed controller became very strong, gives very good results and possesses good robustness.

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46

Silva-Ortigoza, Ramón, Alfredo Roldán-Caballero, Eduardo Hernández-Márquez, José Rafael García-Sánchez, Magdalena Marciano-Melchor, Victor Manuel Hernández-Guzmán e Gilberto Silva-Ortigoza. "Robust Flatness Tracking Control for the “DC/DC Buck Converter-DC Motor” System: Renewable Energy-Based Power Supply". Complexity 2021 (14 ottobre 2021): 1–18. http://dx.doi.org/10.1155/2021/2158782.

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Abstract (sommario):

The design of a robust flatness-based tracking control for the DC/DC Buck converter-DC motor system is developed in this paper. The design of the control considers the dynamics of a renewable energy power source that plays the role of the primary power supply associated with the system. The performance and robustness of the control is verified through simulations via MATLAB-Simulink when abrupt changes in some parameters of the system are taken into account. Also, experiments are performed by using a built prototype of the DC/DC Buck converter-DC motor system, a TDK-Lambda G100-17 programmable DC power supply, MATLAB-Simulink, and the DS1104 board from dSPACE. In this regard, the TDK-Lambda G100-17 is implemented with the aim of emulating photovoltaic panels through the solar array mode for generating the power supply of the system. Thus, both simulations and experiments show the effectiveness of the proposed control scheme.

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47

Hinov, Nikolay, Bogdan Gilev e Tsveti Hranov. "Model-Based Optimization of an LLC-Resonant DC-DC Converter". Electronics 8, n. 7 (17 luglio 2019): 799. http://dx.doi.org/10.3390/electronics8070799.

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Abstract (sommario):

The study presented in the paper is to guarantee the performance of the LLC DC-DC converter using model-based optimization. The primary scope of the study is to maintain the output parameters regardless of the variation of the values of the circuit elements. In engineering practice, it is known that any schematic element cannot be reproduced with an absolute accuracy of features. In addition, its main parameters change during operation due to changes in operating temperature, aging, operating modes and so on. Optimization procedures are a tool for finding the most appropriate values for circuit elements, with selected constraints, target functions and operating modes. In electronic converters, these are most often: minimal loss, maximum efficiency, the critical-aperiodic transition process, realization of certain dynamics, appropriate modes of operation and so on. The results obtained show that using the proposed approach produces more robustness to disturbances and tolerances, with improved dynamics and faster transient processes. On the other hand, the value of the circuit elements is smaller, and reliable operation of the protection and automatic regulation systems is achieved.

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48

Kong, Jian Quan, e De Quan Zhou. "Digital Image Watermarking Based on Second Generation Wavelet Transform". Applied Mechanics and Materials 241-244 (dicembre 2012): 3026–29. http://dx.doi.org/10.4028/www.scientific.net/amm.241-244.3026.

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Abstract (sommario):

Most of the watermarking techniques based on DWT technique embed watermarks into the detail (or middle frequency) coefficients of the host image for a good-trade-off between robustness and fidelity. But, in order to obtain the most robustness, the DC area (LL sub-band) may be a most suitable region for watermark embedding, as the signal energy of DC components is much bigger than that of high frequency sub-bands. A blind novel watermarking algorithm based on fast lifting wavelet transform, a kind of second generation wavelet transform, is proposed. Firstly, a multi-level discrete lifting wavelet transform is employed, and then the watermark is embedded into DC area of last level lifting wavelet transform according to amplitude modulation method with a secret key, lastly a watermarked image is obtained after lifting wavelet reconstruction to be applied. The results of experiments show that this algorithm is still effective after applying high compression ratio JPEG.

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49

Liu, Siyuan, Xiaona Liu, Shaojie Jiang, Zengnan Zhao, Ning Wang, Xiaoyu Liang, Minghui Zhang e Lihua Wang. "Application of an Improved STSMC Method to the Bidirectional DC–DC Converter in Photovoltaic DC Microgrid". Energies 15, n. 5 (22 febbraio 2022): 1636. http://dx.doi.org/10.3390/en15051636.

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Abstract (sommario):

In a photovoltaic DC microgrid, the intermittent power supply of the distributed generation and the fluctuation of the load power will cause the instability of the bus voltage. An improved super-twisting sliding mode control method based on the super-twisting algorithm is proposed to solve this problem. In this paper, a bidirectional half-bridge buck–boost converter was selected as the research topic. The proposed control method replaces the sign function with the saturation function to further mitigate the chattering effect. The stability of the proposed control method was proven to be finite-time convergent using the Lyapunov theory control. Compared with PI control, linear sliding mode control, and terminal sliding mode control, the proposed control method reduces the system overshoot by up to 33% and greatly improves the response speed; compared with the traditional super-twisting sliding mode control method, the system overshoot is reduced by 6.8%, and the response speed is increased by 38%. The experimental results show that the proposed control method can reduce the fluctuation range of the bus voltage, shorten the time of bus voltage stability, effectively stabilize the bus voltage of the photovoltaic DC microgrid, and maintain strong robustness.

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50

Liu, Zhengxin, Jiuyu Du e Boyang Yu. "Design Method of Double-Boost DC/DC Converter with High Voltage Gain for Electric Vehicles". World Electric Vehicle Journal 11, n. 4 (7 ottobre 2020): 64. http://dx.doi.org/10.3390/wevj11040064.

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Abstract (sommario):

Direct current to direct current (DC/DC) converters are required to have higher voltage gains in some applications for electric vehicles, high-voltage level charging systems and fuel cell electric vehicles. Therefore, it is greatly important to carry out research on high voltage gain DC/DC converters. To improve the efficiency of high voltage gain DC/DC converters and solve the problems of output voltage ripple and robustness, this paper proposes a double-boost DC/DC converter. Based on the small-signal model of the proposed converter, a double closed-loop controller with voltage–current feedback and input voltage feedforward is designed. The experimental results show that the maximum efficiency of the proposed converter exceeds 95%, and the output voltage ripple factor is 0.01. Compared with the traditional boost converter and multi-phase interleaved DC/DC converter, the proposed topology has certain advantages in terms of voltage gain, device stress, number of devices, and application of control algorithms.

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