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International Conference on control, Decision and Information Technologies (CoDIT)

作者： W. Akermi N. Alyaoui A. B. Guiloufi K. Chabbir N. Nasri Automatic Industrial Systems Department Applied Science and Technology Gafsa University Gafsa Tunisia Laboratory of Modeling Analysis and Control of Systems (MACS) National Engineering School of Gabes (ENIG) Gabes University Gabes Tunisia Computer Science and Telecommunications Department Higher Institute of Applied Science and Technology Gafsa University Gafsa Tunisia Preparatory Institute for Engineering Studies of Gabes Laboratory of Modeling Analysis and Control of Systems (MACS) National Engineering School of Gabes (ENIG) Gabes University Gabes Tunisia Computer Science Department-Gafsa Gafsa University Gafsa Tunisia Laboratory of Smart Systems for Engineering and E-Health Based on Technologies of Image and Telecommunications (SETIT) Sfax University Sfax Tunisia

ISBN: (数字)9798350373974

ISBN: (纸本)9798350373981

Vehicular networks, also known as Vehicular Ad Hoc Networks (VANETs), have become a crucial technology for vehicle communication, providing wireless connectivity among vehicles and between vehicles and infrastructure. However, the dynamic and complex nature of these networks presents unique challenges in routing and resource management. In this study, we explore the use of artificial intelligence (AI) to improve the performance of vehicular networks, focusing on two widely used routing protocols: Optimized Link State Routing (OLSR) and Destination-Sequenced Distance Vector (DSDV).We aim to evaluate the performance of these traditional routing protocols within the context of vehicular networks by integrating machine learning techniques such as neural network regression (MLRegression). Our goal is to understand how the integration of artificial intelligence can enhance the prediction and optimization of vehicular network performance. Using MLRegression, we aim to develop accurate prediction models for performance metrics such as latency, throughput, packet delivery rate, and more, based on network parameters and environmental conditions. This comparative evaluation, which involves incorporating an AI-based approach, will allow us to better understand the strengths and weaknesses of each protocol and provide recommendations for improving vehicular networks.

关键词： Measurement Wireless communication Adaptation models Adaptive systems Vehicular ad hoc networks Routing Throughput Routing protocols Vectors Vehicle dynamics

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A Research of Digital Directional Current Protection Devices Operation Stability in Transient Modes during Single Phase to Earth Faults in 6-10 KV Networks with Isolated Neutral Point 3

A Research of Digital Directional Current Protection Devices...

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3rd International Youth Scientific and Technical Conference Relay Protection and Automation, RPA 2020

作者： Evdakov, A.E. Kutumov, Yu. D. Shadrikova, T. Yu. Shuin, V.A. Ivanovo State Power Engineering University Automatic Control of Electrical Power Systems Department Ivanovo Russia

ISBN: (纸本)9781665404631

Single phase to earth fault is the prevailing type of damage in 6-10 kV medium voltage networks. The most dangerous of single phase to earth faults is intermittent arc earth faults, which are accompanied by significant overvoltage in electrically connected network. In 6-10 kV distribution networks in the function of earth fault protection device during the impossibility of simple and sustainable zero sequence current protection devices, directional zero sequence current protection devices are commonly used. According to the data from operating experience the main disadvantage of some directional zero sequence current protection devices is refusal-to-operate possibility during internal faults and unnecessary operation during external intermittent arc faults. That is why, the research and substantiation of directional zero sequence current protection devices realization principles, which can provide high dynamic stability of protection operation is the relevant objective. The main tendency of development of relay protection equipment, including single phase to earth protection devices is associated with introduction of microprocessor technologies and digital signal processing methods. Thus, in this work the research of functioning of protection devices during transient modes is made for digital-based performance of zero sequence current protection devices. © 2020 IEEE.

关键词： Digital devices

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A Research of Operation Stability of Overhead Transmission Lines' Relay Protection Algorithms, Which are Based on Travelling Wave Principle 3

A Research of Operation Stability of Overhead Transmission L...

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3rd International Youth Scientific and Technical Conference Relay Protection and Automation, RPA 2020

作者： Kutumov, Yu.D. Ivanovo State Power Engineering University Automatic Control of Electrical Power Systems Department Ivanovo Russia

ISBN: (数字)9781665404631

ISBN: (纸本)9781665404631

The characteristic of the problem, relevance of the paper. At the present time in electric power industry a concept of intelligent electrical power system is realized. A key component of this system is a digital substation. One of the main tasks of digital substation equipment is realization of effective relay protection and network automation devices. Relatively new phenomenon in this field is relay protection devices, which are based on travelling wave parameters measurement. A very important characteristic of relay protection devices (especially for extra-high voltage transmission lines of 330-750 kV) is their speed-of-response. The usage of travelling wave-based principle will allow to limit speed-of-response only by travelling wave propagation time along a protected transmission line. © 2020 IEEE.

关键词： Electric lines

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Modelling the connection between propagating disturbances and solar spicules

arXiv

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arXiv 2024年

作者： Skirvin, Samuel Skirvin, S.J. Samanta, Tanmoy Van Doorsselaere, Tom Centre for mathematical Plasma Astrophysics Department of Mathematics KU Leuven Celestijnenlaan 200B bus 2400 LeuvenB-3001 Belgium Plasma Dynamics Group Department of Automatic Control & Systems Engineering The University of Sheffield United Kingdom Indian Institute of Astrophysics Koramangala Bangalore India

Aims. Propagating (intensity) disturbances (PDs) are well reported in observations of coronal loops and polar plumes in addition to recent links with co-temporal spicule activity in the solar atmosphere. However, despite being reported in observations, they are yet to be studied in depth and understood from a modelling point of view. Methods. In this work, we present results from a 3D MHD numerical model featuring a stratified solar atmosphere which is perturbed by a p-mode wave driver at the photosphere, subsequently forming spicules described by the rebound shock model. Results. Features with striking characteristics to those of detected PDs appear consistent with the co-temporal transition region dynamics and spicular activity resulting from nonlinear wave steepening and shock formation. Furthermore, the PDs can be interpreted as slow magnetoacoustic pulses propagating along the magnetic field, rather than high speed plasma upflows, carrying sufficient energy flux to at least partially heat the lower coronal plasma. Using forward modelling, we demonstrate the similarities between the PDs in the simulations and those reported in observations from IRIS and SDO/AIA. Conclusions. Our results suggest that, in the presented model, the dynamical movement of the transition region is a result of wave dynamics and shock formation in the lower solar atmosphere, and that PDs are launched co-temporally with the rising of the transition region, regardless of the wave-generating physical mechanisms occurring in the underlying lower solar atmosphere. However, it is clear that signatures of PDs appear much clearer when a photospheric wave driver is included. Finally, we present the importance of PDs in the context of providing a source for powering the (fast) solar wind. © 2024, CC BY.

关键词： Magnetohydrodynamics

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A stochastic moving ball approximation method for smooth convex constrained minimization

arXiv

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arXiv 2024年

作者： Singh, Nitesh Kumar Necoara, Ion Automatic Control and Systems Engineering Department National University of Science and Technology Politehnica Bucharest Spl. Independentei 313 Bucharest060042 Romania Gheorghe Mihoc-Caius Iacob Institute of Mathematical Statistics and Applied Mathematics of the Romanian Academy Street Bucharest050711 Romania

In this paper, we consider constrained optimization problems with convex, smooth objective and constraints. We propose a new stochastic gradient algorithm, called the Stochastic Moving Ball Approximation (SMBA) method, to solve this class of problems, where at each iteration we first take a gradient step for the objective function and then perform a projection step onto one ball approximation of a randomly chosen constraint. The computational simplicity of SMBA, which uses first-order information and considers only one constraint at a time, makes it suitable for large-scale problems with many functional constraints. We provide a convergence analysis for the SMBA algorithm using basic assumptions on the problem, that yields new convergence rates in both optimality and feasibility criteria evaluated at some average point. Our convergence proofs are novel since we need to deal properly with infeasible iterates and with quadratic upper approximations of constraints that may yield empty balls. We derive convergence rates of order O(k−1/2) when the objective function is convex, and O(k−1) when the objective function is strongly convex. Preliminary numerical experiments on quadratically constrained quadratic problems demonstrate the viability and performance of our method when compared to some existing state-of-the-art optimization methods and software. © 2024, CC BY.

关键词： Approximation algorithms

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H observer-based control for fuzzy Hadamard fractional-order systems

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Computational and Applied Mathematics 2025年第4期44卷 1-14页

作者： Rhaima, Mohamed Gassara, Hamdi Mchiri, Lassaad El Hajjaji, Ahmed Ben Makhlouf, Abdellatif Department of Statistics and Operations Research College of Science King Saud University Riyadh Saudi Arabia Laboratory of Sciences Techniques of Automatic Control and Computer Engineering National School of Engineering of Sfax University of Sfax Sfax Tunisia Panthéon-Assas University Paris II Paris France Modeling Information and Systems Laboratory University of Picardie Jules Verne UFR of Sciences Amiens France Department of Mathematics Faculty of Sciences Sfax University Sfax Tunisia

While the $$H_\infty $$ observer-based control has found widespread application in the literature for integer-order systems, researchers have shown less interest in addressing the same issue within the fractional-order framework. In this context, this study delves into the application of $$H_\infty $$ observer-based control for the Hadamard fractional-order system (HFOS) described by the Takagi–Sugeno fuzzy models (TSFM). Using Lyapunov approach and by employing a matrix decoupling technique, LMI based conditions ensuring the existence of an observer and controller, are proposed. To minimize the impact of disturbances on the controlled output, $$H_\infty $$ optimization technique is used. The validity of our approach is substantiated through an example, underscoring the robustness and reliability of our proposed findings.

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Simulation of zero sequence current transformers for protection against single-phase ground fault in medium voltage cable networks

Simulation of zero sequence current transformers for protect...

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2020 IEEE Power and Energy Student Summit, PESS 2020

作者： Evdakov, Aleksey Filatova, Galina Shuin, Vladimir Department of Electric Power Systems Automatic Control Ivanovo State Power Engineering University Ivanovo Russia

ISBN: (纸本)9783800753383

In distribution cable networks of medium voltage (in Russia 6–10 kV), the most common type of damage is single-phase ground fault (SPGF). In an unearthing system, a significant part of the SPGF has an intermittent arc character, which is accompanied by intense transients that have a significant impact on the selectivity and stability of operation, both directional and non-directional current protection against this type of damage. The most effective method for studying the dynamic modes of operation of protection devices against these types of SPGF is a simulation. One of the most difficult tasks arising in the development of simulation protection models is the modeling of zero-sequence cable current transformers. The article is devoted to the development of a simulation model of a zero-sequence electromagnetic current transformer in Simulink, which allows simulate both steady-state and transient SPGF modes with sufficient accuracy at various secondary loads, taking into account the influence of magnetic circuit saturation. © VDE VERLAG GMBH - Berlin - Offenbach.

关键词： Cables

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Nodal Hydraulic Head Estimation through Unscented Kalman Filter for Data-driven Leak Localization in Water Networks ⁎

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IFAC-PapersOnLine 2024年第4期58卷 67-72页

作者： Luis Romero-Ben Paul Irofti Florin Stoican Vicenç Puig Institut de Robòtica i Informàtica Industrial CSIC-UPC Llorens I Artigas 4-6 08028 Barcelona Spain LOS-CS-FMI University of Bucharest Romania Department of Automation Control and Systems Engineering Politehnica University of Bucharest Romania Supervision Safety and Automatic Control Research Center (CS2AC) - UPC Campus de Terrassa Terrassa 08222 Barcelona Spain

In this paper, we present a nodal hydraulic head estimation methodology for water distribution networks (WDN) based on an Unscented Kalman Filter (UKF) scheme with application to leak localization. The UKF refines an initial estimation of the hydraulic state by considering the prediction model, as well as available pressure and demand measurements. To this end, it provides customized prediction and data assimilation steps. Additionally, the method is enhanced by dynamically updating the prediction function weight matrices. Performance testing on the Modena benchmark under realistic conditions demonstrates the method’s effectiveness in enhancing state estimation and data-driven leak localization.

关键词： Fault isolation water distribution system data fusion state estimation Unscented Kalman Filter

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Decomposing Two-Stage Stochastic Scheduling Problems on a continuous-time basis via Slot Similarity

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IFAC-PapersOnLine 2023年第2期56卷 10168-10173页

作者： Daniel Montes José Luis Pitarch César de Prada Department of Systems Engineering and Automatic Control Universidad de Valladolid Spain Instituto U. de Automática e Informática Industrial (ai2) Universitat Politècnica de Valencia Spain Institute of Sustainable Processes Universidad de Valladolid Spain

Incorporating uncertainty into process scheduling by explicitly considering future forecasts is crucial for achieving optimal and feasible solutions in practice. However, the complexity of two-stage stochastic scheduling formulations increases exponentially with the number of scenarios, making it difficult to solve large-scale problems in real-time using mathematical programming, which is often necessary for production-maintenance scheduling. This is where decomposition strategies on a scenario basis can be advantageous. Recently, the authors developed a method for decomposing two-stage scheduling problems (TSSPs) formulated on a discrete-time basis using the Similarity Index. This paper extends this concept to TSSPs formulated on a continuous-time basis by fuzzifying discrete decisions among slots instead of time periods, and incorporating the progressive-hedging algorithm to manage non-anticipativity in continuous decisions. The proposed algorithm is tested in a case study of a multiproduct plant consisting of a single processing unit from the literature. Results show that the proposed decomposition algorithm solves the problem faster than the monolithic formulation.

关键词： Efficient strategies for large-scale complex systems Modelling and decision-making in complex systems Two-Stage Stochastic Scheduling Decomposition Algorithm Real-time algorithms, scheduling, and programming

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Mathematical Modeling of a Special Induction Motor with a Double Squirrel Cage Rotor 20

Mathematical Modeling of a Special Induction Motor with a Do...

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

作者： Tytiuk, Valerii Zachepa, Iurii Rudenko, Nikita Chenchevoi, Volodymyr Prokopenko, Vladimir Kobiliansky, Boris A«Kryvyi Rih National University» Department of Electromechanics State Institution of Higher Education Kryvyi Rih Ukraine Kremenchuk Mykhailo Ostrohradskyi National University Department of Systems of Automatic Control and Electric Drive Kremenchuk Ukraine Ukrainian Engineering Pedagogics Academy Department of Electromechanical and Computer Systems Kharkov Ukraine

ISBN: (纸本)9781665423663

On the basis of the theory of generalized electromechanical converter the mathematical model of a special induction motor with a double squirrel cage rotor that is presented in the form of a system of ordinary nonlinear differential equations 11 th order. The implementation of this model in MATLAB / Simulink is offered. The adequacy of the obtained model is substantiated by checking its parametric sensitivity and stability of the solution when choosing different numerical methods of integration of systems of differential equations. © 2021 IEEE.

关键词： Numerical methods

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