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20th IEEE International Conference on Mechatronics and Automation, ICMA 2023

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

ISBN: (纸本)9798350320831

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. © 2023 IEEE.

关键词： Anomaly detection

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A latent representation of brain networks based on EEG ⁎

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IFAC-PapersOnLine 2024年第15期58卷 414-419页

作者： Lucia Falconi Giulia Cisotto Mattia Zorzi Automatic Control Laboratory ETH Zurich Physikstrasse 3 8092 Zurich Switzerland Dept. of Informatics Systems and Communication University of Milano-Bicocca Milan Italy Dept. of Information Engineering University of Padova Italy Dept. of Information Engineering University of Padova Italy

Electroencephalography (EEG) is one of the most popular techniques to investigate normal as well as pathological cerebral mechanisms, as it allows to measure, non-invasively and in real-time, the brain activity. However, modeling EEG is still extremely challenging, because of its high-dimensionality, low signal-to-noise ratio, and high individual variability. This paper proposes a novel latent representation to study brain networks using EEG by means of a robust dynamic factor analysis (RDFA) approach. We investigate the ability of this latent representation to discriminate between two groups of subjects, i.e. alcoholic and healthy. By RDFA, we can extract a limited number of highly explanatory factors, as low as 8, significantly discriminating between the two groups. Also, we show that different brain patterns can be identified across different stimulation scenarios and EEG locations. Although preliminary, this work could give support to domain experts while providing some clinically-meaningful insights to identify common patterns as well as individual characteristics in different groups of healthy and pathological subjects.

关键词： EEG system identification dynamic factor analysis

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Contagion Propagation with Rule-Based Reasoning and Decentralized control in an Agent-Based Susceptible-Infected-Recovered-Susceptible Infodemic Model 8

Contagion Propagation with Rule-Based Reasoning and Decentra...

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8th International Conference on Big Data, Knowledge and control systems engineering, BdKCSE 2023

作者： Berceanu, Cristian Arshad, Nadia Patrascu, Monica University Politehnica of Bucharest Complex Systems Laboratory Dept. of Automatic Control and Systems Engineering Bucharest Romania University of Bergen Section for Epidemiology and Medical Statistics Dept. of Global Public Health and Primary Care Bergen Norway University Politehnica of Bucharest Complex Systems Laboratory Romania University of Bergen Centre for Elderly and Nursing Home Medicine Dept. of Global Public Health and Primary Care Bergen Norway

ISBN: (纸本)9798350313246

In recent years, and especially during the on-going pandemic, the interest in investigating the dynamics of infodemics has increased to unprecedented levels. In this study we propose an agent-based model for the spread of misinformation, disinformation, and other similar information. The model is based on the susceptible-infected-recovered-susceptible epidemic interpretation. We introduce a rule-based reasoning module to model individual bias in the perception of information based on the psychology concept of illusion of knowledge. We integrate this module into a deliberative-reactive agent controller structure and a decentralized control scheme for the multi-agent system. Results show significant differences between the outputs of the proposed model and the classical version, impressing on the effects of considering local agent individuality when modeling human psycho-social interactions. © 2023 IEEE.

关键词： Multi agent systems

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Research of Electromagnetic and Electromechanical Processes in High-Voltage Soft Start Devices with Gate Turn-Off Thyristors 5

Research of Electromagnetic and Electromechanical Processes ...

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5th IEEE International Conference on Modern Electrical and Energy System, MEES 2023

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

ISBN: (纸本)9798350359787

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. © 2023 IEEE.

关键词： Electric drives

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System Identification-informed Transparent and Explainable Machine Learning with Application to Power Consumption Forecasting

System Identification-informed Transparent and Explainable M...

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Electrical, Computer, Communications and Mechatronics engineering (ICECCME), International Conference on

作者： Hua-Liang Wei Dept. Automatic Control and Systems Engineering Energy Institute Centre of Machine Intelligence Centre for Signal Processing and Cpmplex Systems The University of Sheffield Sheffield UK

System identification (SysID) is the art and science of dealing with dynamic data modelling problems from systems science perspectives. It has been an active field and is still very active today, due to its wide range of applications, especially its basic principles of finding transparent, interpretable and parsimonious models for different purposes. The past decades have witnessed the explosive growth in machine learning (ML) and its applications in all areas of science and engineering. Meanwhile, there has been an increasing demand for the development of transparent, explainable and/or interpretable ML models. This paper proposes a new framework for developing System Identification-informed Transparent and Explainable MAchine Learning (SITEMAL) models. A case study, involving a real power consumption dataset, is presented to demonstrate the application of the proposed modelling framework and its performance for power consumption forecasting.

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Circuit Design Method of Rate Increase in Operational Amplifiers Based on the MH2XA031 Array Chip and CBJT Technological Routes

Circuit Design Method of Rate Increase in Operational Amplif...

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IEEE NW Russia Young Researchers in Electrical and Electronic engineering Conference (EIConRusNW)

作者： Alexey E. Titov Dmitriy V. Kleimenkin Nikolay N. Prokopenko dept. of Automatic Control Systems Southern Federal University Rostov-on-Don Russia dept. of Scientific Research dept. of Information Systems and Radio Engineering Don State Technical University Rostov-on-Don Russia

It has been revealed that in the conditions of small-scale production of discrete-analog filters on switched capacitors and ADC-drivers, it is most advisable to design high-speed operational amplifiers (OAs) based on the CBJT technological route and the MH2XA031 array chip, which allows operation in conditions of low temperatures and exposure to radiation. It has been established that most commercially produced $O A s$ provide an average value of the slew rate (SR, up to $200 \div 300 \mathrm{~V} / \mu \mathrm{s}$). This is largely due to the limitations of the technologies used, and most importantly, to the irrational design of circuits. We study the maximum performance parameters of a CBJT OA with one integrating capacitor, which ensures the stability of the $O A$, and a differentiating transient correction circuit, which is implemented by connecting additional small capacitors to the original circuit. In this case, the $S R$ of the $O A$ increases by more than 500 times (up to $4000 \mathrm{~V} / \mu \mathrm{s}$).

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Tube-based coalitional MPC with plug-and-play features

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IFAC-PapersOnLine 2023年第2期56卷 7704-7709页

作者： E. Masero P.R. Baldivieso-Monasterios J.M. Maestre P.A. Trodden E.F. Camacho Dept. of Ingeniería de Sistemas y Automática Universidad de Sevilla Spain Dept. of Automatic Control and Systems Engineering University of Sheffield UK Dept. of Systems Science Graduate School of Informatics Kyoto University Japan

This paper presents a distributed setting of model predictive control (MPC) to manage linear multi-agent systems consisting of coupled subsystems. Specifically, local controllers can work in coalitions to improve performance and handle plug-and-play events. This study provides insight into a coalitional MPC strategy based on optimized tubes that handles plug-in and plug-out subsystems. Moreover, we explore an inherent robustness gap to absorb disturbances not covered by the tubes without having to group local controllers. A comparison of our approach with centralized and decentralized MPC is reported using an illustrative example.

关键词： Model predictive control distributed control multi-agent systems time-varying systems robust control plug-and-play events

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High-Speed CBJT Operational Amplifier with Dual-Input-Stage Subclass Input Stage

High-Speed CBJT Operational Amplifier with Dual-Input-Stage ...

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Informatics, Electronics, and Radio engineering (PIERE), International Conference Problems of

作者： Dmitry V. Kuznetsov Alexey E. Titov Marsel A. Sergeenko Nikolay N. Prokopenko Dept. of Scientific Research dept. of Information Systems and Radio Engineering Don State Technical University Rostov-on-Don Russia Dept. of Automatic Control Systems Southern Federal University Rostov-on-Don Russia Dept. of Information Systems and Radio Engineering Don State Technical University Rostov-on-Don Russia

ISBN: (数字)9798331516321

ISBN: (纸本)9798331516338

A significant disadvantage of classical operational amplifiers with two complementary differential stages in parallel (on the inputs) is that here the slew rate has small values (50–80 V/μs). This is due to the non-linear mode of operation of the input differential stage. In this paper, a new circuit technique for slew rate enhancement in CBJT operational amplifiers of this subclass is discussed. Due to the use of special circuitry of the input differential stage, the process of recharging of the integrating correction capacitance in non-inverting and inverting operational amplifier inclusions is forced. This ultimately improves the performance of the operational amplifier in the large-signal mode. The purpose and originality of this paper is to investigate a new circuit solution of operational amplifier, in which by introducing differentiating transient correction circuits, slew rate is improved by two orders of magnitude. This does not require nanometer-scale technological processes, and the operational amplifier transistors can operate with emitter currents on the order of 100 μA. It is possible to build micro-power operational amplifier on the basis of the proposed circuit design technique, including CBJT and CCMOS transistors. Computer simulations show that for micron CBJT silicon technological processes, the SR of the proposed operational amplifier in non-inverting inclusion (at 100% feedback) increases from 80 to 10000 V/μs, i.e., more than two orders of magnitude.

关键词： Operational amplifiers Micrometers Patents Voltage Silicon Circuit synthesis Transistors Transient analysis Informatics Parasitic capacitance

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Method for Improving the Performance of Operational Amplifier with HA2700 Microchip Architecture

Method for Improving the Performance of Operational Amplifie...

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IEEE International Conference on Electrical engineering and Photonics (EExPolytech)

作者： Dmitry V. Kuznetsov Alexey E. Titov Marsel A. Sergeenko Nikolay N. Prokopenko Dept. of Scientific Research Dept. of Information Systems and Radio Engineering Don State Technical University Rostov-on-Don Russia Dept. of Automatic Control Systems Southern Federal University Rostov-on-Don Russia Dept. of Information Systems and Radio Engineering Don State Technical University Rostov-on-Don Russia

ISBN: (数字)9798350388879

ISBN: (纸本)9798350388886

A circuit technique for increasing the maximum output voltage slew rate (SR) of an integrated operational amplifier (OpAmp) with the HA2700 microchip architecture based on the modernization of the input differential stage (DS) is considered. An OpAmp architecture is proposed in which the influence of parasitic capacitances of DS reference current sources and capacitances on the transistor substrate on the SR is minimized. This allows the use of micron technological processes in the fabrication of CBJT OpAmps, which are widely used to improve the radiation resistance of microchips. Computer simulation of the proposed OpAmp is performed, which shows that the SR of the new circuit differs from the SR of the well-known serial OpAmp by more than 40 times and reaches values of about 800 V/µs at the emitter current of the input transistors of the DC in the range of up to 80-100 μA. The developed OpAmp is recommended for practical use in discrete-to-analog filters on switched capacitors.

关键词： Operational amplifiers Integrated circuits Micrometers Filters Capacitors Computer architecture Voltage Capacitance Transistors Switching circuits

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Mobile Application for Visualizing the Measurements 5

Mobile Application for Visualizing the Measurements

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5th IEEE International Conference on Modern Electrical and Energy System, MEES 2023

作者： Kiresova, Simona Guzan, Milan Sobota, Branislav Melnykov, Viacheslav Yatsiuk, Rostyslav Peryvertailo, Bohdan Technical University of Košice Dept. of Theoretical and Industrial Electrical Engineering Košice Slovakia Technical University of Košice Dept. of Computers and Informatics Košice Slovakia Kremenchuk Mykhailo Ostrohradskyi National University Dept. of Systems of Automatic Control and Electric Drive Kremenchuk Ukraine National University Dept. of Computer Engineering and Electronics Kremenchuk Mykhailo Ostrohradskyi Kremenchuk Ukraine

ISBN: (纸本)9798350359787

This paper deals with the design of an Android mobile application and visualization of the measured values of particulate matter and meteorological factors from the measurement stations. The application can in principle be effectively used in any field of data visualization. The architecture of the mobile application, the security, the use of AWS services to access the data in the InfluxDB databases, as well as the user interface and graphical visualizations of the measured data are described and illustrated. The application is user tested and the paper documents their first experiences using the mobile application. © 2023 IEEE.

关键词： Visualization

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