Search Results - "Hoyos, Fredy E."

A Simplified Algorithm for Setting the Observer Parameters for Second-Order Systems with Persistent Disturbances Using a Robust Observer by Rincón, Alejandro, Hoyos, Fredy E., Candelo-Becerra, John E.

“…The properties of the convergence region of the estimation error of a robust observer for second-order systems are determined, and a new algorithm is proposed…”
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Second-Order Sliding-Mode Control Applied to Microgrids: DC AC Buck Converters Powering Constant Power Loads by Monsalve-Rueda, Miguel, Candelo-Becerra, John E, Hoyos, Fredy E

“…Microgrids are designed to connect different types of AC and DC loads, which require robust power controllers to achieve an efficient power transfer. However,…”
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Global stability of a continuous bioreactor model under persistent variation of the dilution rate by Rincón, Alejandro, Hoyos, Fredy E, Restrepo, Gloria

“…In this work, the global stability of a continuous bioreactor model is studied, with the concentrations of biomass and substrate as state variables, a general…”
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Comparison, validation and improvement of empirical soil moisture models for conditions in Colombia by Rincón, Alejandro, Hoyos, Fredy E., Candelo-Becerra, John E.

“…Modeling soil moisture as a function of meteorological data is necessary for agricultural applications, including irrigation scheduling. In this study,…”
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Zero Average Dynamic Controller for Speed Control of DC Motor by Hoyos, Fredy E., Candelo-Becerra, John E., Rincón, Alejandro

“…This paper presents the use of the buck converter with Zero Average Dynamics to control the speed of a permanent magnet direct current motor. For this…”
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Numerical Validation of a Boost Converter Controlled by a Quasi-Sliding Mode Control Technique with Bifurcation Diagrams by Trujillo, Simeón Casanova, Candelo-Becerra, John E., Hoyos, Fredy E.

“…A boost converter is an electronic circuit that generates a higher voltage in the output than in the input. The most common method to regulate the DC/DC…”
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Dynamic Analysis of a Permanent Magnet DC Motor Using a Buck Converter Controlled by ZAD-FPIC by Hoyos Velasco, Fredy, Candelo-Becerra, John, Rincón Santamaría, Alejandro

“…This paper presents the dynamic analysis of a permanent magnet DC motor using a buck converter controlled by zero average dynamics (ZADs) and fixed-point…”
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Analysis of a generalized Fujikawa's growth model by Rincón, Alejandro, Angulo, Fabiola, Hoyos, Fredy E

“…We analyze a generalized form of the Fujikawas growth model which involves an adaptation function that enhances the representation of the lag phase. This model…”
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Conditioned Adaptive Control for an Uncertain Bioreactor with Input Saturation and Steep Settling Desired Output by Rincón, Alejandro, Hoyos, Fredy E., Candelo-Becerra, John E.

“…In this work, a controller is developed for a continuous bioreactor with an unknown reaction rate term, subject to input saturation. The substrate…”
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Design and Evaluation of a Robust Observer Using Dead-Zone Lyapunov Functions—Application to Reaction Rate Estimation in Bioprocesses by Rincón, Alejandro, Hoyos, Fredy E., Restrepo, Gloria M.

“…This paper addresses the design and evaluation of a robust observer for second order bioprocesses considering unknown bounded disturbance terms and uncertainty…”
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Quality and Defect Inspection of Green Coffee Beans Using a Computer Vision System by García, Mauricio, Candelo-Becerra, John E., Hoyos, Fredy

“…There is an increased industry demand for efficient and safe methods to select the best-quality coffee beans for a demanding market. Color, morphology, shape…”
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Adaptive Control for a Biological Process under Input Saturation and Unknown Control Gain via Dead Zone Lyapunov Functions by Rincón, Alejandro, Hoyos, Fredy E., Candelo-Becerra, John E.

“…In this work, substrate control of a biological process with unknown varying control gain, input saturation, and uncertain reaction rate is addressed. A novel…”
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Application of Zero Average Dynamics and Fixed Point Induction Control Techniques to Control the Speed of a DC Motor with a Buck Converter by Hoyos, Fredy E., Candelo-Becerra, John E., Hoyos Velasco, Carlos I.

“…Several technological applications require well-designed control systems to induce a desired speed in direct current (DC) motors. Some controllers present…”
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Speed Regulation of a Permanent Magnet DC Motor with Sliding Mode Control Based on Washout Filter by Velasco-Muñoz, Hugo, Candelo-Becerra, John E., Hoyos, Fredy E., Rincón, Alejandro

“…The accuracy of control systems applied to motors is influenced by uncertainties and abrupt variations of the load and system parameters. Some robust control…”
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A Robust Observer—Based Adaptive Control of Second—Order Systems with Input Saturation via Dead-Zone Lyapunov Functions by Rincón, Alejandro, Restrepo, Gloria M., Hoyos, Fredy E.

“…In this study, a novel robust observer-based adaptive controller was formulated for systems represented by second-order input–output dynamics with unknown…”
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An Output Feedback Controller for a Second-Order System Subject to Asymmetric Output Constraint Based on Lyapunov Function with Unlimited Domain by Rincón, Alejandro, Hoyos, Fredy E., Candelo-Becerra, John E.

“…In this work, a new robust controller is designed for a second-order plant model, considering asymmetric output constraints. The tracking error convergence and…”
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Discrete and Continuous Model of Three-Phase Linear Induction Motors “LIMs” Considering Attraction Force by Toro-García, Nicolás, Garcés-Gómez, Yeison A, Hoyos, Fredy E

“…A fifth-order dynamic continuous model of a linear induction motor (LIM), without considering “end effects” and considering attraction force, was developed…”
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Global Stability Analysis of the Model of Series/Parallel Connected CSTRs with Flow Exchange Subject to Persistent Perturbation on the Input Concentration by Rincón, Alejandro, Hoyos, Fredy E., Candelo-Becerra, John E.

“…In this paper, we study the convergence properties of a network model comprising three continuously stirred tank reactors (CSTRs) with the following features:…”
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Derivative for Functions f:G→H, Where G Is a Metric Divisible Group by Granada Díaz, Héctor Andrés, Trujillo, Simeón Casanova, Hoyos, Fredy E.

“…In this paper, a derivative for functions f:G→H, where G is any metric divisible group and H is a metric Abelian group with a group metric, is defined. Basic…”
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Dynamic Behavior of a Sliding-Mode Control Based on a Washout Filter with Constant Impedance and Nonlinear Constant Power Loads by Monsalve-Rueda, Miguel, Candelo-Becerra, John E., Hoyos, Fredy E.

“…Power converters (PCs) with their control techniques help regulate voltages of nodes in microgrids with different types of loads such as resistive, inductive,…”
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