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IEEE Power India Conference

作者： M. Venkateswara Reddy Sourav De Ranjana Sodhi Grid Automation & Control group National Renewable Energy Laboratory Golden United States Dept. of Electrical Engineering Indian Institute of Technology Ropar Punjab India

ISBN: (纸本)9781665459310

This paper proposes a novel statistical parameters based data driven approach for passive islanding detection. The proposed scheme relies in the voltage data, measured at the point of common coupling, and is comprised of three stages. The Stage-1 quickly detects what is termed as coarse islanding, Stage-2 computes the decaying DC detector (DDCD), and 3) finally, the digital relay logic (DRL) is devised in Stage-3. The proposed scheme is tested as per the IEEE-1547, UL 1741 and IEC-62116 standards. Various tests are investigated on the modified IEEE-13 bus system, modeled in PSCAD/EMTDC, under stringent test scenarios such as power mismatch, induction motor starting effect, capacitor bank switching and various level of loads changes, considered for both single and multiple DG systems. The test results reveal that the proposed scheme can detect islanding in less than 2 cycles, and results in nearly zero non detection zone (NDZ). Also, the scheme can very well be used for single-phase microgrids too as it relies only on the single phase voltage information.

关键词： Islanding Voltage measurement Induction motors Detectors Switches Microgrids Threshold voltage

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Electric Vehicles Modeling: A Review

Electric Vehicles Modeling: A Review

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IEEE/IAS International Conference on Industry Applications (INDUSCON)

作者： Victor Manuel Riva De Oliveira Vinícius Ferreira dos Remédios Clainer Bravin Donadel Walbermark Marques Dos Santos Márcio Almeida Có Vinícius Secchin de Melo Reginaldo Barbosa Nunes Electrical Engineering Department Federal Institute of Espírito Santo Vitoria Brazil Electrical Engineering Departament Federal University of Espírito Santo Vitória Brazil Control and Automation Eng. Dept. Federal Institute of Espírito Santo Serra Brazil

The increasing concern about climate change has been leading researches in many areas to investigate solutions for this issue. An emerging subject related to it is electric vehicles (EV). Although it is an important topic, there is still a lack of review papers about EVs modeling. In this context, this paper aims to bring a review about EV modeling to fulfill this gap. A wide bibliography review is made to cover different kinds of EV s modeling, in many aspects. As a conclusion, in some areas, authors do not diverge from each other, while in others may exist a large range of different ways to model the EV s. In this case, researchers should choose the modeling that fits the best for their research, which may vary in simplicity and computational effort.

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Mathematical modeling of flow washing of preserved rawhides

Mathematical modeling of flow washing of preserved rawhides

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Circuits, Systems, Communications and Computers (CSCC), International Conference on

作者： Dagmar Janáčová Pavel Mokrejš Vladimír Vašek Rudolf Drga Dept. of Automation and Control Engineering Faculty of Applied Informatics Tomas Bata University in Zlí n Zlín Dept. of Polymer Engineering Faculty of Technology Tomas Bata University in Zlín Zlín Dept. of Security Engineering Faculty of Applied Informatics Tomas Bata University in Zlín Zlín

ISBN: (纸本)9781665481878

This paper presents a mathematical model of flow washing with the initial volume of the washing bath of preserved raw hides by salt. The main result of this work is the determination of the concentration field of the preservative in the raw material depending on the washing time and the size of the washing water flow, based on the correct laboratory-determined diffusion coefficient of the preservative using a tortuous factor. The paper points out the usefulness of applying theoretical tools of chemical engineering in areas such as the tanning industry.

关键词： Industries Computers Computational modeling Chemical engineering Mathematical models Raw materials Integrated circuit modeling

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A discrete-time adaptive current controller for BLDCM with Uncertain Back-EMF signals

A discrete-time adaptive current controller for BLDCM with U...

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2020 International Conference on Computation, automation and Knowledge Management, ICCAKM 2020

作者： Adiguzel, Fatih Turker, Turker Istanbul University-Cerrahpasa Dept. of Electrical and Electronics Eng Istanbul Turkey Yildiz Technical University Dept. of Control and Automation Engineering Istanbul Turkey

ISBN: (纸本)9781728106663

In this study, a discrete-time adaptive control structure is proposed to eliminate the effects of periodic uncertainties in brushless direct current motor drives. The discrete-time model of brushless direct current motor drives is introduced first, followed by the derivation of the error dynamics and of the discrete-time control structure, which deals with uncertain periodic back-emf signals with known periodicity. The discrete-time adaptation rule was modified to overcome the switching phenomenon. The effectiveness and viability of the proposed adaptive controller algorithm was successfully demonstrated in various realistic numerical simulations. © 2020 IEEE.

关键词： controllers

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Sense-Assess-eXplain (SAX): Building Trust in Autonomous Vehicles in Challenging Real-World Driving Scenarios 31

Sense-Assess-eXplain (SAX): Building Trust in Autonomous Veh...

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31st IEEE Intelligent Vehicles Symposium, IV 2020

作者： Gadd, Matthew De Martini, Daniele Marchegiani, Letizia Newman, Paul Kunze, Lars Oxford Robotics Institute University of Oxford Dept. Engineering Science United Kingdom Automation and Control Aalborg University Dept. Electronic Systems Denmark

This paper discusses ongoing work in demonstrating research in mobile autonomy in challenging driving scenarios. In our approach, we address fundamental technical issues to overcome critical barriers to assurance and regulation for large-scale deployments of autonomous systems. To this end, we present how we build robots that (1) can robustly sense and interpret their environment using traditional as well as unconventional sensors;(2) can assess their own capabilities;and (3), vitally in the purpose of assurance and trust, can provide causal explanations of their interpretations and assessments. As it is essential that robots are safe and trusted, we design, develop, and demonstrate fundamental technologies in real-world applications to overcome critical barriers which impede the current deployment of robots in economically and socially important areas. Finally, we describe ongoing work in the collection of an unusual, rare, and highly valuable dataset. © 2020 IEEE.

关键词： Autonomous vehicles

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Target Capturing in an Ellipsoidal Region with a Swarm of Quadrotor UAVs

Target Capturing in an Ellipsoidal Region with a Swarm of Qu...

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International Conference on Unmanned Aircraft Systems (ICUAS)

作者： M. Alp Merzi Veysel Gazi Giuseppe Fedele Luigi D’ Alfonso Antonio Bono Dept. Electrical and Electronics Eng. Faculty of Engineering Marmara University Istanbul Turkey Dept. Control and Automation Eng. Faculty of Electrical and Electronics Engineering Yildiz Technical University Istanbul Turkey Dept. of Informatics Modeling Electronics and Systems Eng. University of Calabria Rende Italy

ISBN: (数字)9781665405935

ISBN: (纸本)9781665405942

In a recent paper [1], we developed a target capturing strategy for swarms composed of double integrator agents. In this paper, we build on the results in [1] and focus on the implementation of the methodology for a swarm composed of quadrotor UAVs. We utilize both MATLAB and ROS environments under realistic conditions for that purpose. In ROS, we utilize Ultra-Violet LED blinkers based Ultra-Violet Direction And Ranging (UVDAR) system for relative localization. The sensing and localization errors serve as realistic errors for the assumptions in [1] for the uncertainties of the velocity and acceleration of the target. We verify in a realistic scenario that the agents converge to a user-defined ellipsoidal ring around the target despite the uncertainties and the more realistic agent dynamics.

关键词： Location awareness Uncertainty Ultraviolet sources Light emitting diodes Distance measurement Sensors Aircraft

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Simulation Model of a Pneumatic Drive for Compressing Electrodes of Stationary Contact Spot Welding Machine

Simulation Model of a Pneumatic Drive for Compressing Electr...

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International Conference on control Systems, Mathematical Modelling, automation and Energy Efficiency (SUMMA)

作者： Ilya L Sandler Dmitriy V Ivanov Michail A Terekhin Irina N Bragina Ilya V Lebakin Ruzil A Zaripov Dept. Digital Technologies Samara State University of Railway Transport Samara Russia Dept. Automation and Control in Technical Systems Samara State Technical University Samara Russia Dept. Information Systems Security Samara National Research University Samara Russia Dept. Digital Technologies Institute of Innovative Development FSBEI HE SamSMU MOH Russia Samara State University of Transport Higher School of Medical Engineering Samara Russia

The article presents a simulation model of a pneumatic drive for electrodes of a stationary contact spot welding machine. Thanks to the developed model, it becomes possible to analyze the system, as well as visually study its operation. The result of modeling the system is the obtained transients of the elements of the pneumatic system. The developed simulation model adequately describes the state and behavior of a real system of pneumatic compression of electrodes. The work is of interest to pneumatic engineers, designers and other specialists working in the field of pneumatics and can be used for more accurate and efficient design, analysis and optimization of not only a specific system of pneumatic compression of electrodes, but also pneumatic systems in general.

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Improving the Efficiency of a Multistage Evaporator Station for Sugar Production Using Neural Networks

Improving the Efficiency of a Multistage Evaporator Station ...

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International Conference on Modern Electrical and Energy Systems (MEES)

作者： Nataliia Zaiets Nataliia Lutska Lidiia Vlasenko det. of Automation and Robotic Systems National University of Life and Environmental Sciences of Ukraine Kyiv Ukraine dept. of Automation and Computer Technologies of Control Systems National University of Food Technologies Kyiv Ukraine dept. of Software Engineering and Cyber Security State University of Trade and Economics Kyiv Ukraine

ISBN: (纸本)9798350346848

The paper shows the process of developing a model of multistage evaporator station of a sugar factory based on a neural network. The neural network predicts the main performance indicators of the multistage evaporator station, such as the concentration of syrup at the output of the evaporator and the amount of evaporated water at the station. Unlike existing solutions, forecasting is performed in real time based on a set of indicators of the automation system (temperatures, flow rates, levels, pressure, density in the apparatus) and industrial laboratory (concentration of solids at the inlet to the evaporation station). The proposed neural network model has an MLP structure with 27 inputs, 2 outputs and one hidden layer with 20 neurons and predicts these indicators with an error of less than 5%. This allows to increase the informative support of the operator-technologist on the quality indicators of the enterprise without additional load on the industrial laboratory and without additional cost automatic quality devices, as well as to perform timely adjustment of the technological mode of the department.

关键词： Productivity Soft sensors Predictive models Solids Sugar industry Data models Real-time systems

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Autonomous Surface Vessel with Remote Human on the Loop: System Design for STCW Compliance

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IFAC-PapersOnLine 2021年第16期54卷 224-231页

作者： Kjeld Dittmann Peter Nicholas Hansen Dimitrios Papageorgiou Signe Jensen Marie Lützen Mogens Blanke Technical University of Denmark Dept. of Electrical Engineering Automation and Control Group DK 2800 Lyngby Denmark University of Southern Denmark Odense Denmark

Autonomous surface vessels comprise complex automated systems with advanced onboard sensors. These help establish situation awareness and perform many of the complex tasks required for safe navigation. However, situations occur that require assistance by a human proxy. If not physically present on board, information digestion and sharing between human and machine become crucial to maintain safe operation. This paper addresses the co-design of on-board systems and a Remote control Centre (RCC). Using the international regulations on watch-keeping (STCW) as a basis, the paper discuss how an autonomous system is designed to meet the STCW requirements. It is discussed how the autonomous system is made aware of the state of the vessel, its surroundings, on-board defects or navigational challenges and shared with the RCC in a collaborating system perspective.

关键词： Autonomous marine crafts Safe Navigation Remote Operation Autonomous Ship Regulations

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Reset-control-based current tracking for a solenoid with unknown parameters

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IFAC-PapersOnLine 2021年第5期54卷 199-204页

作者： R. Bertollo M. Schwegel A. Kugi L. Zaccarian Dept. of Industrial Engineering University of Trento Italy Automation and Control Institute TU Wien Austria AIT Austrian Institute of Technology GmbH Center for Vision Automation & Control Vienna Austria LAAS-CNRS Université de Toulouse CNRS Toulouse France

We propose a hybrid controller for reference tracking for the output current of a solenoid. The solenoid can be modeled as a first-order linear plant with unknown parameters. The proposed hybrid controller comprises 1) a feed forward action, based on an estimate of the unknown plant parameters exploiting a hybrid formulation of the recursive least-squares method, and 2) a feedback action, exploiting a reset control scheme based on a first-order reset element. We prove stability properties for the closed-loop system and we show through simulations that the current output converges to the reference for sufficiently exciting reference signals.

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