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5th IEEE International Conference on Communications, Information, Electronic and Energy systems, CIEES 2024

作者： Mihalev, Georgi Yordanov, Stanimir Ormandzhiev, Krasimir Stoycheva, Hristina Todorov, Todor Technical University of Gabrovo Dept. of Automation Information and Control Systems Gabrovo Bulgaria Technical University of Gabrovo Dept. of Power Engineering Gabrovo Bulgaria Technical University of Gabrovo Dept. of Comunication Technique and Technologies Gabrovo Bulgaria

ISBN: (纸本)9798350352863

The paper presents the implementation of a Continuous-Time Model Predictive control (CMPC) regulator for controlling an electrohydraulic servo system. The control object is a test bench consisting of three modules and a PC-based data acquisition and control system. The system is modeled in state-space form, accounting for parametric uncertainties. The synthesis of the model predictive controller is performed by approximating the control signal using Laguerre orthonormal functions. The article includes mathematical formulas and relationships that illustrate the modeling approach. Simulations and robust analysis of the closed-loop system are conducted. Through a real-time control system, experimental data and graphs are obtained, demonstrating the performance and optimality of the synthesized control strategy. © 2024 IEEE.

关键词： Model predictive control

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Monitoring and Forecasting Quality Indicators of Predough Production in the Bakery Industry 5

Monitoring and Forecasting Quality Indicators of Predough Pr...

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5th IEEE KhPI Week on Advanced Technology, KhPIWeek 2024

作者： Lutska, Nataliia Zaiets, Nataliia Vlasenko, Lidiia Zhyltsov, Andrii Dept. of Automation and Computer Technologies of Control Systems National University of Food Technologies Kyiv Ukraine dept. of Automation and Robotic Systems National University of Life and Environmental Sciences of Ukraine Kyiv Ukraine Dept. of Software Engineering and Cyber Security State University of Trade and Economics Kyiv Ukraine Dept. of Electromagnetic Systems The Institute of Electrodynamics The National Academy of Sciences of Ukraine Kyiv Ukraine

ISBN: (纸本)9798350384499

The work demonstrates the process of developing a machine learning model for a system for monitoring and controlling the quality of predough at a bakery. This system will provide continuous analysis of the predough parameters, such as temperature, humidity, lifting force and titranic acidity, which will ensure timely detection of deviations in the quality of the predough and avoid production problems. In addition, it will help automate the quality control process and ensure the stability of production processes. Analysis and forecasting of dough parameters will improve the quality of produced bread or other bakery products. Management based also on the predicted values of technological indicators of the predough will allow the enterprise to avoid unnecessary costs of materials and energy and increase economic efficiency. As part of the study, seven machine learning models were created and reviewed, including three linear and four varieties of binary decision trees. An analysis of the best model - a regression decision tree - was carried out, confirming its effectiveness and the validity of the resulting hierarchical structure, in particular, the prediction of important indicators of predough with a high degree of reliability, which indicates its importance in practical applications in production. The created model can be used to monitor and control product quality in real time, allowing operators to quickly identify and correct any deviations in process performance. Also, by analyzing changes in the variables of the predough production process, it is possible to identify precursors of possible production accidents or deviations in product quality, which will allow timely measures to be taken to avoid them. ©2024 IEEE.

关键词： Bakeries

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Calculation of Magnetoelectric Brushless DC Electric Motor in Polar Coordinates

Calculation of Magnetoelectric Brushless DC Electric Motor i...

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2024 International Conference on Industrial engineering, Applications and Manufacturing, ICIEAM 2024

作者： Afanasyev, Alexsandr A. Genin, Valery S. Vasileva, Lidia N. Ivanova, Nadezhda N. Ulianov Chuvash State University Dept. Of Automation And Control In Technical Systems Cheboksary Russia Ulianov Chuvash State University Dept. Of Mathematical And Hardware Support Of Information Systems Cheboksary Russia

ISBN: (纸本)9798350395013

The electromagnetic calculation of magnetoelectric switched-type motors with high-energy permanent magnets by the method of separating Fourier variables in polar coordinates is considered. A two-dimensional analytical model is used taking into account the real geometry of permanent magnets, stator slots with a fixed finite magnetic permeability of the teeth and the yoke of the stator and rotor cores. To do this, the single magnetic field of the machine is divided into a set of cylindrical strips, analyzed independently of each other. At the boundaries of the strips, the conditions for conjugating magnetic fields are met: scalar magnetic potentials and normal components of magnetic induction do not undergo jumps. Magnetic potentials are determined from the solution of the Dirichlet boundary value problem, and induction, which is usually determined from the solution of the Neumann boundary value problem, is here determined by differentiating the expression for the magnetic potentials.. The latter eliminates the need to solve additionally the Neumann boundary value problem. In this case, an original technology for finding Fourier constants is used, based on the equality of magnetic potentials and magnetic inductions at the boundaries of the strips. Graphs of magnetic induction in the air gap at the pole division are presented, obtained taking into account the stator gearing, winding harmonics of the magnetomotive force and the geometric structure of the arrangement of permanent magnets. It has been shown that bevel of the stator slots by a tooth pitch makes it possible to eliminate the reactive torque of the motor. © 2024 IEEE.

关键词： Permanent magnets

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Magnetomotive Force and Winding Coefficients of Alternating Current Windings

Magnetomotive Force and Winding Coefficients of Alternating ...

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2024 International Ural Conference on Electrical Power engineering, UralCon 2024

作者： Afanasyev, Alexsandr A. Ivanova, Nadezhda N. Vasileva, Lidia N. Ulianov Chuvash State University Dept. of Automation and Control in Technical Systems Cheboksary Russia Ulianov Chuvash State University Dept. of Mathematical and Hardware Support of Information Systems Cheboksary Russia

ISBN: (纸本)9798350386028

The physical nature of the magnetomotive force (MMF) of an alternating current winding, discretely located in slots and being a source of a magnetic field that has both potential and vortex components, the latter being limited in the space of the slot, is considered. It is shown that in this capacity the role of the MDS is played by a set of magnetic sheets of slot currents, which, in terms of location and duration of sections with linear and nonlinear changes, can differ significantly from the generally accepted (classical) MDS winding. An analytical description of the stepped classical MMF curve of a winding with an integer and a fraction is proposed in the form of a set of expansions into a trigonometric series of MMF curves of coils, presented in the form of two-pole rectangles, having different heights and bases with a shortened winding pitch. It is shown that the frequency response of a fractional winding can be used to find the spectrum of its distribution coefficients for a known arrangement of coils in the slots. It was found using the example of a fairly simple fractional winding with a fractional denominator equal to 2 that, firstly, determining the spectrum of distribution coefficients using a well-known formula for windings with an integer by replacing this number with some equivalent one can lead to significant errors;secondly, variation in the winding pitch significantly changes the amplitudes of the higher harmonics of the MMF, including the appearance of harmonics with an order that is a multiple of three. © 2024 IEEE.

关键词： Speed regulators

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AN INTEGRATED BREAST CANCER MICROARRAY ANALYSIS APPROACH

UPB Scientific Bulletin, Series C: Electrical Engineering an...

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UPB Scientific Bulletin, Series C: Electrical engineering and Computer Science 2022年第2期84卷 79-90页

作者： Lixandru-Petre, Irina-Oana Buiu, Catalin Dept. of Automatic Control and Systems Engineering University POLITEHNICA of Bucharest Romania

As knowledge of the biological and biophysical basis of cellular function has increased, opportunities to understand the cellular and molecular functioning of organic matter have expanded, and gene expression microarrays have become a widely used technique to study the dynamics of biological processes. In this paper, we present a gene expression analysis approach using R programming, starting from mRNA oligonucleotide matrices ending with interrelated genes, analyzed within a chosen biological process. © 2022, Politechnica University of Bucharest. All rights reserved.

关键词： Microarrays

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Detection of Consumer Electrical Load Profile Anomalies 20

Detection of Consumer Electrical Load Profile Anomalies

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20th International Conference on Smart Technologies, EUROCON 2023

作者： Farrugia, Michael Scerri, Kenneth Sammut, Andrew University of Malta Dept. of Systems and Control Engineering Msida Malta University of Malta Dept. of Electronic Systems Engineering Msida Malta

ISBN: (纸本)9781665463973

Faulty meters, billing inaccuracies and fraudulent activity all contribute to the non-technical losses experienced by power utilities. Apart from the intended advantage of billing efficiency, the advent of smart meters for consumption and load profile logging, has made possible the analysis of subscriber data for load balancing and consumer classification, amongst other uses. This study analyses data from smart meters in Malta and develops a method for anomaly detection aiming to identify costumers contributing to non-technical losses. Consumers are grouped into clusters with similar weekly consumption patterns using hierarchical clustering. For each consumer, two novel coefficients are then computed: the Anomaly Coefficient, which measures the divergence in consumption patterns for a consumer from all other member of the same cluster, and the Cluster Change Coefficient, which quantifies the likelihood of a customer to exhibit patterns associated with other clusters. Together these two measures are joined in a single Anomaly Score, thus identifying consumers with highly irregular consumption patterns. © 2023 IEEE.

关键词： Smart meters

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The Influence of Shielding Enclosure on the Characteristics of Protection Devices Operating in Differential and Common Modes

The Influence of Shielding Enclosure on the Characteristics ...

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2025 International Russian Smart Industry Conference, SmartIndustryCon 2025

作者： Kosteletskii, Valerii P. Lakoza, Alexandr M. Chernikova, Evgeniya B. Tomsk State University of Control Systems and Radioelectronics Dept. of Microwave and Quantum Radio Engineering Tomsk Russia

ISBN: (纸本)9798331511241

In this work, we used quasi-static simulation to evaluate the influence of shielding enclosure on the attenuation coefficient and per-unit-length delays of devices protecting against ultra-wideband pulses. The protection devices were 6-and 8-conductor structures, each consisting of two transmission lines with inhomogeneous dielectric filling, combined into one structure. The simulation showed that increasing the distance between the shield walls and the 6-conductor structure resulted in the same attenuation coefficients as without the shield. Therefore, the shield should be kept as far away as possible to preserve the characteristics. In the 8-conductor structure, increasing the distance to the shield walls had a non-significant influence on the attenuation coefficient in the common and differential modes. This probably happened because the active conductors were placed in the central part (inside) of the structure cross-section. The per-unit-length mode delays in both structures were not influenced by changing distances to the walls. © 2025 IEEE.

关键词： Electric shielding

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Measuring Electrical Characteristics of Communication Satellite Transponders Using Digital Signals 25

Measuring Electrical Characteristics of Communication Satell...

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25th IEEE International Conference of Young Professionals in Electron Devices and Materials, EDM 2024

作者： Tislenko, Vladimir I. Roshchin, Konstantin N. Andronov, Eugene V. Savin, Aleksandr A. Zhuravlev, Sergey S. Geltser, Andrey A. Dept. of Radioelectronics and Communication Systems Tomsk State University of Control Systems and Radioelectronics LLC NPK TESART Tomsk Russia Dept. of Advanced Engineering School Tomsk State University of Control Systems and Radioelectronics LLC NPK TESART Tomsk Russia Dept. of Telecommunications and Basic Radio Engineering Tomsk State University of Control Systems and Radioelectronics LLC NPK TESART Tomsk Russia

ISBN: (纸本)9798350389234

This paper discusses methods for estimating the electrical parameters of payloads (transponders) of communications spacecraft using digital modulation signals. To estimate the parameters, the processing of the quadrature signal at the output of the transponder, obtained during the signal constellation measurements, as well as the determination of the amplitude of the error vector in the testing process, is used. Application of these methods allows to significantly reduce the test duration and improve the test procedure based on the identified factors affecting the amplitude of the error vector. The study of electrical parameters of payload of communication spacecraft is an important aspect of their operation. Repeaters that provide ground-to-spacecraft communications must operate reliable and efficiently. The evaluation of these parameters allows optimizing the testing process and providing more accurate results. Digital modulation signals are widely used in modern communication systems. They allow you to transmit data at high speed and minimize signal distortion. However, for the correct operation of repeaters, it is necessary to accurately estimate their electrical parameters. The application of these methods reduces the duration of tests, which is especially important in the development and testing of a spacecraft. This also reduces the cost of testing and ensures the accuracy of the results. Digital modulation signals are also more reliable than analog modulation signals, making them an ideal choice for space-based communication systems. © 2024 IEEE.

关键词： Transponders

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Optimal Fault Detection for Closed-Loop Linear Uncertain systems 63

Optimal Fault Detection for Closed-Loop Linear Uncertain Sys...

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63rd IEEE Conference on Decision and control, CDC 2024

作者： Classens, Koen Ickenroth, Tjeerd Van De Wijdeven, Jeroen Heemels, W.P.M.H. Maurice Oomen, Tom Asml Netherlands Eindhoven University of Technology Control Systems Technology Section Dept. Mechanical Engineering Netherlands Delft University of Technology Delft Center for Systems and Control Dept. 3mE Netherlands

ISBN: (纸本)9798350316339

Robust fault detection is crucial for ensuring the reliability and safety of complex engineering systems. However, distinguishing faults from disturbances and model uncertainty which are inherently present in any practical system remains remains a challenging task. This paper addresses the robust fault detection filter design problem for continuous-time linear time-invariant uncertain systems operating in open or closed-loop configurations. The proposed framework offers a unified approach to handle both parametric and dynamic uncertainties by solving a single Riccati equation, based on a worst-case disturbance and uncertainty scenario. The efficacy of the proposed approach is demonstrated on a numerical multivariable double mass-spring-damper system. The results illustrate that an optimal compromise is achieved between fault sensitivity and rejection of modelling uncertainties and disturbances. This capability enables the clear differentiation between faults and undesired effects in the residuals, thereby enhancing fault detection reliability, ultimately contributing to improved safety and performance. © 2024 IEEE.

关键词： Riccati equations

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BIOPHYSICAL SIGNAL PROCESSING FOR AUTOMATIC ANXIETY CLASSIFICATION IN A VIRTUAL REALITY EXPOSURE THERAPY SYSTEM

UPB Scientific Bulletin, Series C: Electrical Engineering an...

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UPB Scientific Bulletin, Series C: Electrical engineering and Computer Science 2024年第2期86卷 73-84页

作者： Jinga, Nicolae Petrescu, Cătălin-Dumitru Mitruț, Oana Moldoveanu, Alin Moldoveanu, Florica Petrescu, Livia Dept. of Computer Science National University of Science and Technology POLITEHNICA Bucharest Romania Dept. of Automatic Control and Systems Engineering National University of Science and Technology POLITEHNICA Bucharest Romania Faculty of Biology University of Bucharest Romania

This paper presents a signal processing framework for automatic anxiety level classification in a virtual reality exposure therapy system. Two types of biophysical data (heart rate and electrodermal activity) were recorded, pre-processed and passed through a feature extraction procedure that provided input for the real-time anxiety level classification algorithm. We showcase the mathematical and engineering techniques behind the procedures and conclude with the challenges encountered in our research and future development ideas. The proposed method provides a good estimate of the level of anxiety while having at the same time a reduced level of complexity, allowing implementation on equipment with limited computing resources. © 2024, Politechnica University of Bucharest. All rights reserved.

关键词： Classification (of information)

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