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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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Augmented Reality Used in Technical Diagnostics and Maintenance 15

Augmented Reality Used in Technical Diagnostics and Maintena...

引用

15th International Conference Elektro, ELEKTRO 2024

作者： Janota, Ales Holecko, Peter Faculty of Electrical Engineering and IT UNIZA Dept. of Control and Information Systems Žilina Slovakia

ISBN: (纸本)9798350372359

Integrating digital data and human sensory input in real-world settings offers new possibilities in device diagnostics and maintenance. In this study, we utilized the EcoStruxure Augmented Operator Advisor to develop an augmented reality application for a family house heating system. Our application was designed without access to the real heating system;instead, we simulated its operation with a programmable logic controller. Our final application includes three primary scenes: the heat pump, its indoor unit, and the engine room. Drawing on our practical experience, we discuss the benefits of our approach and the software tools used and summarize our subjective opinions. © 2024 IEEE.

关键词： Maintenance

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Distance Based Single-Channel Target Speech Extraction

Distance Based Single-Channel Target Speech Extraction

引用

2025 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2025

作者： Shi, Runwu Yen, Benjamin Nakadai, Kazuhiro Dept. of Systems & Control Engineering Tokyo Institute of Technology Tokyo Japan

ISBN: (纸本)9798350368741

This paper aims to achieve single-channel target speech extraction (TSE) in enclosures by solely utilizing distance information. This is the first work that utilizes only distance cues without using speaker physiological information for single-channel TSE. Inspired by recent single-channel Distance-based separation and extraction methods, we introduce a novel model that efficiently fuses distance information with time-frequency (TF) bins for TSE. Experimental results in both single-room and multi-room scenarios demonstrate the feasibility and effectiveness of our approach. This method can also be employed to estimate the distances of different speakers in mixed speech. Online demos are available at https://***/distance-demo-page/. © 2025 IEEE.

关键词： distance based sound separation single-channel Target speech extraction

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Detection of Consumer Electrical Load Profile Anomalies 20

Detection of Consumer Electrical Load Profile Anomalies

引用

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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DETReg Incorporating Semi-Supervised Learning for Object Detection in the advanced Driver-Assistance systems 1

DETReg Incorporating Semi-Supervised Learning for Object Det...

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1st International Conference on Robotics, engineering, Science, and Technology, RESTCON 2024

作者： Nakano, Keita Matsushima, Kousuke National Institute of Technology Kurume College Advanced Engineering School Fukuoka Japan National Institute of Technology Kurume College Dept. of Control and Information Systems Engineering Fukuoka Japan

ISBN: (纸本)9798350348842

In advanced Driver-Assistance systems (ADAS) and automatic driving, it is important to accurately recognize objects around the vehicle. DETReg is one of the unsupervised pre-Training methods using Transformer, which is self-supervised by combining localization and categorization. DETReg performs self-supervised learning on unlabeled images. Then, it extracted a wide range of features from rich aspects of the data and gained the flexibility to adapt to many variations. Fine tuning then used the labeled dataset of the target task to fine tune the model to fit the specific dataset. This allowed DETReg to achieve higher accuracy in the object detection task. However, it is difficult to learn DETReg efficiently because of its slow learning time. In this paper, we propose a new pre-Training method for object detection, called Semi-DETReg, that utilizes a few supervised labels during self-supervised learning. We incorporate semi-supervised learning into DETReg by using a portion of the supervised training data in the pre-Training to improve efficiency. We demonstrate the effectiveness of our method by conducting experiments and comparing our method to a similarly trained DETReg. © 2024 IEEE.

关键词： Object detection

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Leveraging Simulation-Based Statistical Analysis for Optimal Polynomial and Inflection Point Selection in Local Frequency-Based Center of Inertia Frequency Estimation 3

Leveraging Simulation-Based Statistical Analysis for Optimal...

引用

3rd International Conference on Power systems and Electrical Technology, PSET 2024

作者： Wang, Yukai Baba, Jumpei The University of Tokyo Dept. of Electrical Engineering and Information Systems Tokyo Japan The University of Tokyo Dept. of Advanced Energy Tokyo Japan

ISBN: (纸本)9798350353204

This study presents an analysis to optimizing the polynomial order and the number of inflection points for estimating the Center of Inertia (CoI) frequency and its Rate of Change (RoCoF) in power systems. Leveraging simulation-based statistical analysis, the research identifies the most effective polynomial order and inflection point count, enhancing the precision of CoI frequency estimation during transient events. The methodology promises significant improvements in frequency stability assessment, crucial for integrating renewable energy sources and maintaining system robustness. The findings offer valuable insights for power system operators and researchers in advancing frequency control strategies. © 2024 IEEE.

关键词： Frequency estimation

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A Flatness-Based Trajectory Tracking control for Chemical Reactor 21

A Flatness-Based Trajectory Tracking Control for Chemical Re...

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21st International Multi-Conference on systems, Signals and Devices, SSD 2024

作者： Hamad, Qasim Mahdi Raafat, Safanah M. Uinversity of Babylon Dept. Electrical Engineering Babylon Iraq University of Technology Dept. Control and Systems Eng. Baghdad Iraq

ISBN: (纸本)9798350374131

This article utilizes the flatness property of the nonlinear model of the continuous stirred tank reactor (CSTR) to design a Flatness-Based Trajectory-Tracking control (FBTTC). Focusing on the Single input single output (SISO) case, first principles of mass and temperature balance of the reactor are used in the modeling and control design. The flatness-spaces modeling task is carried out assuming two cases of selected flat outputs along with a finite number of their time derivative. The reactor temperature and the concentration are selected as flat output in each case separately. For trajectory tracking control problem, both differential flatness-based control and Feedback Linearization-Based control (FBLBC) are derived and simulated, enabling a comparison between the two methods. The chosen approach emphasizes the simplicity and high accuracy of control design using flatness property for the examined nonlinear system. © 2024 IEEE.

关键词： Feedback linearization

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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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Closed-Loop System Identification of an Unstable Nonlinear System Using Koopman Operator 4

Closed-Loop System Identification of an Unstable Nonlinear S...

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4th International Symposium on Instrumentation, control, Artificial Intelligence, and Robotics, ICA-SYMP 2025

作者： Maneeloke, Benjaset Boonto, Sudchai Sanposh, Peerayot Tipsuwan, Yodyium Chinthaned, Natthawut Tanaprasitpattana, Warit Kasetsart University Dept. of Electrical Engineering Bangkok Thailand King Mongkut's University of Technology Thonburi Dept. of Control Systems and Instrumentation Engineering Bangkok Thailand Kasetsart University Dept. of Computer Engineering Bangkok Thailand

ISBN: (纸本)9798331505400

This paper presents a novel methodology for closed-loop system identification of unstable nonlinear systems using the Koopman operator with Extended Dynamic Mode Decomposition with control (EDMDc). The study highlights the critical role of selecting appropriate observable functions to develop accurate and efficient Koopman models. We demonstrate that the resulting Koopman models exhibit excellent fitting and validation properties and retain the stabilizability of the original nonlinear systems. These models are verified through time and frequency responses under closed-loop control using a Linear Quadratic Regulator (LQR), confirming their effectiveness. Future work will extend this framework to more complex systems and incorporate machine learning techniques to refine the selection of observable functions. This approach aims further to enhance the adaptability and robustness of Koopman-based control strategies. © 2025 IEEE.

关键词： Dynamic mode decomposition

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High-Speed CBJT Operational Amplifier with Dual-Input-Stage Subclass Input Stage 3

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

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3rd IEEE International Conference on Problems of Informatics, Electronics and Radio engineering, PIERE 2024

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

ISBN: (纸本)9798331516321

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. © 2024 IEEE.

关键词： Operational amplifiers

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