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Sallen-Key Dual Channel Low-Pass Filter with Tunable Cutoff Frequency

Sallen-Key Dual Channel Low-Pass Filter with Tunable Cutoff ...

IEEE Region 8 International Conference on Computational Technologies in Electrical and Electronics engineering, SIBIRCON

作者： Darya Yu. Denisenko Nikolay N. Prokopenko Nikolay V. Butyrlagin Dept. of Information Systems and Radio Engineering DTSU Dept. of Automatic Control Systems SFU Rostov-on-Don Russia Dept. of Information Systems and Radio Engineering DTSU Institute for Design Problems in Microelectronics of RAS Rostov-on-Don Zelenograd Russia Dept. of Information Systems and Radio Engineering DTSU Rostov-on-Don Russia

ISBN: (纸本)9781665464819

A two-channel Sallen-Key low-pass filter on three non-inverting amplifiers is studied, which has the property of unrelated digital set of the upper cut-off frequency at constant index of the transmission coefficient in the bandwidth range. The restructuring of the upper cutoff frequency and the attenuation of the pole is carried out by modify the resistors’ resistance of one in the upper channel of the low-pass filter. It is shown that a non-inverting amplifier in the lower channel of the low-pass filter can have a small value of the systematic zero bias voltage component, what is important for the operation of the low-pass filter at the input of analog-to-digital converters. It has been established that due to the construction of a low-pass filter according to a two-channel architecture, the requirement for the magnitude of the output static voltage of the upper channel is removed. The base equations of the new low-pass filter scheme are given and the summary modeling in the Micro-Cap was pictured.

关键词： Resistance Operational amplifiers Time-frequency analysis systematics Cutoff frequency Capacitors Low-pass filters

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High-Performance Nonlinear control for Three-Phase Two-Level Boost PFC Rectifier

High-Performance Nonlinear Control for Three-Phase Two-Level...

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2024 International Conference on Materials and Energy: Energy in Electrical engineering, ICOME-EE 2024

作者： Sriprang, Songklod Nahid-Mobarakeh, Babak Takorabet, Noureddine Pierfederici, Serge Siangsanoh, Apinya Yodmanee, Kanapot Mungporn, Pongsiri Thounthong, Phatiphat Poonnoy, Nitchamon Bizon, Nicu Suyata, Thong-In Noosawang, Sakrit Université de Lorraine GREEN-ENSEM Laboratory 54505 France Rajamangala University of Technology Rattanakosin Wang Klai Kangwon Campus Petchkasem RD Prachuap Khiri Khan77110 Thailand Université de Lorraine LEMTA Laboratory 54505 France Thailand Thai-French Innovation Institute King Mongkut's University of Technology North Bangkok Bangkok10800 Thailand Faculty of Technical Education Dept. Teacher Training in Electrical Engineering Thailand University of Pitesti Faculty of Electronics Communication and Computers Pitesti110040 Romania University of Technology Faculty of Rajamangala Department of Electrical Engineering Thanyaburi 39 Moo 1 Rangsit-Nakhonnayok Road Pathum Thani 12110 Thailand King Mongkut's University of Technology Thonburi Faculty of Engineering Dept. of Control System and Instrumentation Engineering Bangkok10140 Thailand

ISBN: (纸本)9798331531577

This paper presents a high-performance nonlinear control strategy for a three-phase, two-level boost Power Factor Correction (PFC) rectifier. The proposed control method aims to achieve superior performance in terms of power factor correction, output voltage regulation, and dynamic response under various operating conditions. Utilizing advanced nonlinear control techniques, the system ensures optimal tracking of the reference signals, minimizing total harmonic distortion (THD) and improving overall efficiency. The effectiveness of the control strategy is validated through extensive simulations and experimental results, demonstrating significant improvements in the transient and steady-state performance of the rectifier. This approach provides a robust and efficient solution for PFC applications in modern power electronics systems. © 2024 IEEE.

关键词： Nonlinear control systems

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Research of Electromagnetic and Electromechanical Processes in High-Voltage Soft Start Devices with Gate Turn-Off Thyristors

Research of Electromagnetic and Electromechanical Processes ...

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International Conference on Modern Electrical and Energy systems (MEES)

作者： Victor Busher Oleksii Chornyi Valerii Tytiuk Oksana Glazeva Anatoliy Shestaka Lubov Melnikova Dept. of Electrical Engineering and Electronics National University “Odessa Maritime Academy” Odessa Ukraine Institute of Electromechanics Energy Saving and Automatic Control Systems Kremenchuk Mykhailo Ostrohradskyi National University Kremenchuk Ukraine Kryvyi Rih National University Kryvyi Rih Ukraine Dept. Electromechanical Engineering Odessa State Polytechnic University Odessa Ukraine

The purpose of the work is to investigate the possibilities of soft-start devices with gate turn-off thyristors in electric drives of bow thrusters with adjustable propeller pitch to increase reliability, reduce mechanical shocks and currents, and improve electromagnetic compatibility with the ship’s electrical power plant. The characteristic features of these drives are operation on fan load and the need for a smooth start in a sufficiently short time to reduce impact torque in the mechanism. As a result of the analysis, a solution with a shunt capacitor is proposed, which provides high accuracy of regulation of the 1st harmonic of the voltage on the motor according to the given law. The minimum value of the capacitor capacity was found, which for the ABB/AMD710L8T motor with a capacity of 2.7 MW is 150-250 μF at switching frequencies from 500 to 1000 Hz. For the first time, the dependences of the GTO switching frequency on the capacitor capacity and the coefficient of harmonic distortion of the current in the stator phase of the selected motor were found. Frequencies are obtained that correspond to the actual physical characteristics of the GTO (500–1000 Hz). At such switching frequencies, the characteristics of the soft start device practically do not differ from the ideal regulator of the phase voltage of an asynchronous motor. This makes it possible to synthesize closed systems with stabilization of the main coordinates of soft starter electric drive, two-circuit systems with the formation of a given tachogram with torque limitation. All this makes it feasible to implement soft start devices based on gate turn-off thyristors.

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IEEE VTS Motor Vehicles Challenge 2023: A Multi-physical Benchmark Problem for Next Generation Energy Management Algorithms

IEEE VTS Motor Vehicles Challenge 2023: A Multi-physical Ben...

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IEEE Conference on Vehicle Power and Propulsion (VPPC)

作者： Jonathan Brembeck Ricardo De Castro Jakub Tobolář Iman Ebrahimi German Aerospace Center (DLR) Institute of System Dynamics and Control (SR) Oberpfaffenhofen Germany Dept. of Mechanical Engineering University of California Merced

ISBN: (纸本)9781665475884

This article presents a benchmark problem that researchers can use to evaluate the performance of energy management algorithms for multi-energy source and multimotor electric vehicles. The model makes use of Modelica, an open source, a-causal, object-oriented language for modeling cyber-physical systems in multi-domains (e.g. electrical, mechanical, thermal) of the vehicle components. The model also includes the aspect of three-dimensional mechanics, which enables completely new degrees of freedom in the controller design in comparison to one-dimensional approaches. To support interoperability among multiple design tools, the Modelica vehicle model is provided as a Functional Mockup Unit, an industry standard for exchange of simulation models. A set of standardized input-output interfaces and key performance metrics is also provided in the benchmarking problem, enabling the systematic ranking of multiple energy management strategies.

关键词： Solid modeling systematics Object oriented modeling Heuristic algorithms Benchmark testing Propulsion Energy management

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An Adaptive CUSUM Approach for Automating Sleep Apnoea Analysis Based on Pulse and Oximetry Data

An Adaptive CUSUM Approach for Automating Sleep Apnoea Analy...

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IEEE International Conference on Mechatronics and Automation

作者： Dongjin Yang Eishaan Bhargava Heather Elphick Lyudmila S. Mihaylova Dept. of Automatic Control and Systems Engineering University of Sheffield UK Department of Paediatric Otolaryngology Sheffield Children’s Hospital Sheffield UK Department of Paediatric Respiratory and Sleep Medicine Sheffield Children’s Hospital Sheffield UK

Sleep apnoea is a common sleep disorder during human sleep. It is usually diagnosed by a doctor after recording one nights’ sleep signals. Patients have to go to the hospital to record sleep signals, which is time-consuming and resource-intensive. The study focused on two signals, pulse data and oximetry data, with the aim of detecting apnoea using a single signal. This paper introduced an anomaly detection approach using the adaptive cumulative sum (ACUSUM) change point detection algorithm to monitor outliers in the signal. In addition, the test results of ACUSUM will be compared with the test results of classical CUSUM. Besides, the threshold selection has been changed from an unchanging constant to a value related to the standard deviation of the selected signal based on a rational subgroup process. The results of the comparison confirm that ACUSUM is better than classical CUSUM in the accuracy of automatic detection.

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Complex-Variable Sliding-Mode control of Instantaneous Complex Energy and Power for Grid-Tied Inverter*

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IFAC-PapersOnLine 2023年第2期56卷 451-457页

作者： Gerardo Tapia-Otaegui Sebastián Gómez Jorge Jorge A. Solsona Ana Susperregui M. Itsaso Martínez Claudio A. Busada University of the Basque Country UPV/EHU Dept. of Automatic Control and Systems Engineering Faculty of Engineering-Gipuzkoa 20018 Donostia Spain Instituto de Investigaciones en Ingeniería Eléctrica (CONICET-UNS) and Dpto. de Ingeniería Eléctrica y de Computadoras-Universidad Nacional del Sur 8000 Bahía Blanca Argentina

A complex-variable sliding-mode control (SMC) algorithm is proposed to govern inverters interfacing renewable energy sources (RESs) with the electrical grid. It is conceived to control the instantaneous energy stored in the passive components of the system and its rate of change, as well as the instantaneous reactive energy and power exchanged with the grid. The stability of the resulting closed-loop system is analyzed, and tuning of the designed SMC algorithm is also tackled. In addition, the design and tuning of a nonlinear observer estimating the renewable power supplied to the DC link are addressed. The overall control scheme obtained by combining the proposed complex-variable SMC algorithm with such observer is assessed in simulation, demonstrating its outstanding tracking performance and high robustness in presence of large parameter variations.

关键词： Complex variables energy control inverters observers power control renewable energy systems robustness stability analysis sliding-mode control

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Complex-Valued Sliding-Mode control for DFIG Synchronization to Non-Ideal Grids*

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IFAC-PapersOnLine 2023年第2期56卷 2746-2752页

作者： Ana Susperregui M. Itsaso Martínez Gerardo Tapia-Otaegui Jorge A. Solsona Sebastián Gómez Jorge Claudio A. Busada University of the Basque Country UPV/EHU Dept. of Automatic Control and Systems Engineering Faculty of Engineering-Gipuzkoa 20018 Donostia Spain Instituto de Investigaciones en Ingeniería Eléctrica (CONICET-UNS) and Dpto. de Ingeniería Eléctrica y de Computadoras-Universidad Nacional del Sur 8000 Bahía Blanca Argentina

Even if the electrical grid is subject to constrained disturbances, doubly-fed induction generator (DFIG)-based wind turbines should be able to synchronize their stator voltage with that of the grid to ensure a smooth connection to the electric power system. In order to face the synchronization task under simultaneously unbalanced and harmonically distorted grid voltages, a complex-valued sliding-mode control (SMC) algorithm, naturally chatter-free and phase-locked loop (PLL)-independent, is proposed. By accomplishing a stationary reference frame-based design, decomposition into positive- and negative-sequences and harmonic components is not required. The finite-time convergence of such algorithm is analytically demonstrated when subject to both parametric and unmodeled uncertainties, as well as disturbances. Simulation over a 2-MW DFIG model has been carried out in order to validate the performance and robustness of the suggested control structure under unbalanced and harmonically distorted grid voltage, variable speed wind profile, substantial parameter deviations and grid frequency variation.

关键词： Complex variables harmonics induction generators renewable energy systems robustness sliding-mode control synchronization voltage imbalances wind

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I Can Read Your Mind: control Mechanism Secrecy of Networked Dynamical systems under Inference Attacks

arXiv

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arXiv 2022年

作者： He, Jianping Li, Yushan Cai, Lin Guan, Xinping The Dept. of Automation Shanghai Jiao Tong University Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai Engineering Research Center of Intelligent Control and Management Shanghai China The Dept. of Electrical and Computer Engineering University of Victoria BC Canada

Recent years have witnessed the fast advance of security research for networked dynamical system (NDS). Considering the latest inference attacks that enable stealthy and precise attacks into NDSs with observation-based learning, this article focuses on a new security aspect, i.e., how to protect control mechanism secrets from inference attacks, including state information, interaction structure and control laws. We call this security property as control mechanism secrecy, which provides protection of the vulnerabilities in the control process and fills the defense gap that traditional cyber security cannot handle. Since the knowledge of control mechanism defines the capabilities to implement attacks, ensuring control mechanism secrecy needs to go beyond the conventional data privacy to cover both transmissible data and intrinsic models in NDSs. The prime goal of this article is to summarize recent results of both inference attacks on control mechanism secrets and countermeasures. We first introduce the basic inference attack methods on the state and structure of NDSs, respectively, along with their inference performance bounds. Then, the corresponding countermeasures and performance metrics are given to illustrate how to preserve the control mechanism secrecy. Necessary conditions are derived to guide the secrecy design. Finally, thorough discussions on the control laws and open issues are presented, beckoning future investigation on reliable countermeasure design and tradeoffs between the secrecy and control performance. Copyright © 2022, The Authors. All rights reserved.

关键词： Cybersecurity

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Mapping back and forth between model predictive control and neural networks

arXiv

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arXiv 2024年

作者： Drummond, Ross Baldivieso-Monasterios, Pablo R. Valmorbida, Giorgio Dept. of Automatic Control and Systems Engineering University of Sheffield SheffieldS1 3JD United Kingdom L2S CentraleSupélec CNRS Université Paris-Saclay Inria-Saclay Projet DISCO Gif–sur–Yvette91192 France

Model predictive control (MPC) for linear systems with quadratic costs and linear constraints is shown to admit an exact representation as an implicit neural network. A method to "unravel" the implicit neural network of MPC into an explicit one is also introduced. As well as building links between model-based and data-driven control, these results emphasize the capability of implicit neural networks for representing solutions of optimisation problems, as such problems are themselves implicitly defined functions. © 2024, CC BY.

关键词： Model predictive control

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Method of Space Vector Pulse Width Modulation in High Voltage Cascaded Frequency Converter with Damaged H-cells 20

Method of Space Vector Pulse Width Modulation in High Voltag...

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20th IEEE International Conference on Modern Electrical and Energy systems, MEES 2021

作者： Busher, Victor Shestaka, Anatoliy Chornyi, Oleksii Glazeva, Oksana Melnikova, Lubov Tytiuk, Valerii National University 'Odessa Maritime Academy' Dept. of Electrical Engineering and Electronics Odessa Ukraine Energy Saving and Automatic Control Systems Kremenchuk Mykhailo Ostrohradskyi National University Institute of Electromechanics Kremenchuk Ukraine Odessa State Polytechnic University Dept. Electromechanical Engineering Odessa Ukraine Kryvyi Rih National University Kryvyi Rih Ukraine

ISBN: (纸本)9781665423663

The paper proposes a control method for a high-voltage cascade frequency converter with H-bridges, based on Space Vector Pulse Width Modulation, regardless of the number of normal and damaged H-cells in phases. Analytical dependencies are given that explain the principle of balancing asymmetric base vectors, and tabular data are provided for the implementation of this method in most possible emergency modes in 4-6-level frequency converters. It was found that the formation of control laws for power switches only taking into account the change in length and phase shifts between the base vectors in emergency modes is not enough to exclude shock electromagnetic and electromechanical processes in an induction motor. Such shocks occur due to the appearance of an additional shift of the phase-to-phase voltages due to the asymmetry of the phase voltages on the half-period of the generated signal. Based on the expansion in a Fourier series, the necessary correcting phase shifts are calculated for all considered emergency modes. Modelling of electromagnetic and electromechanical processes in an electric drive 3.3 MW, 6.6 kV with a 6-level frequency converter has shown the effectiveness of the developed method - during transitions from a normal to an emergency mode, electromagnetic processes caused by phase shifts are excluded. At the same time, SVPWM in all modes increases the energy efficiency of power supplies by 15.6%, which makes it possible to increase the phase-to-phase voltage by 10... 26% in emergency modes in comparison with sinusoidal PWM. The proposed analytical dependencies and tabular data can be used in the synthesis of control systems with both scalar and vector control. © 2021 IEEE.

关键词： Frequency converters

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