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International Conference on Methods and Models in Automation and Robotics (MMAR)

作者： Kacper Landa Adam Krzysztof Pilat Master's student at Automatic Control and Robotics AGH University of Science and Technology Cracow Poland Faculty of Electrical Engineering Automatics Computer Science and Biomedical Engineering Cracow Poland

In this study, the dynamics and control aspects of a spherical rolling robot's lateral motion are investigated. An approximate, simplified to a single plane, mathematical model is derived using Lagrange equations to check stability of the system. Utilizing the fusion of sensor data, a precise orientation measurement is achieved. Document focuses on a synthesis of a PID controller reducing sideway oscillations that occur in motion of a spherical robot with internal pendulum mechanism.

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Robustness of uncertain discrete linear repetitive processes with disturbance attenuation

Robustness of uncertain discrete linear repetitive processes...

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2016 European control Conference, ECC 2016

作者： Dabkowski, Pawel Galkowski, Krzysztof Rogers, Eric Sebek, Michael Institute of Physiscs Faculty of Physics Astronomy and Informatics Nicolaus Copernicus University ul. Grudziadzka 5 Torun87-100 Poland Institute of Control and Computation Engineering University of Zielona Gora Podgorna 50 Zielona Gora65-246 Poland Electronics and Computer Science University of Southampton SouthamptonSO17 1BJ United Kingdom Department of Control Engineering Faculty of Electrical Engineering Czech Technical University in Prague Technicka 2 Praha 616627 Czech Republic

ISBN: (纸本)9781509025916

Repetitive processes are a class of 2D systems that can be used to model physical systems and also there are applications, such as iterative learning control, where using a repetitive processes setting for design has advantages over alternatives. In most cases, it is discrete dynamics that are basis for design and often there will be a need to deal with uncertainty in the process model and the effects of disturbances. This paper develops new algorithms for these tasks that are computed using linear matrix inequalities when the uncertainty is modeled using two standard representations and disturbance attenuation is measured by an norm. The extension of these algorithms to control law design is also developed. © 2016 EUCA.

关键词： Linear matrix inequalities

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Analysis of interferences in the acoustic measurement of partial discharges from electric power transformers 44

Analysis of interferences in the acoustic measurement of par...

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44th International Congress and Exposition on Noise control engineering, INTER-NOISE 2015

作者： Zmarzly, Dariusz Boczar, Tomasz Frącz, Pawel Department of Faculty of Electrical Engineering Automatic Control and Informatics Opole University of Technology Prószkowska 76 Opole45-758 Poland

The subject matter of the paper concerns improvement of the acoustic emission (AE) method applied for diagnosis of insulations systems of electric power devices. During measurement of AE signals emitted by partial discharges (PD) occurring in insulation systems of electric apparatus there exist different forms of interference sources. Interferences, which accompany measurements performed under industrial conditions may be generated within the operating system or they may be emitted in its neighborhood. Sources of interference signals may have their origin in physical phenomena of mechanical, electrical or acoustical nature. Such interferences superpose on the registered AE signals causing their distortion. Because this may have a direct impact on the correct evaluation of the measured signals gathered with AE method, analysis of the impact of interfering signals on the AE pulses emitted by PD was made. In the paper there are presented results of analysis in the frequency and time-frequency domain, of acoustic interference signals generated by the fans and pumps used for cooling the transformer oil. © 2015 by ASME.

关键词： Partial discharges

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Application of the MUSIC transformation for evaluation of acoustic interferences occurring during laboratory measurements of electrical discharges 44

Application of the MUSIC transformation for evaluation of ac...

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44th International Congress and Exposition on Noise control engineering, INTER-NOISE 2015

作者： Boczar, Tomasz Zmarzly, Dariusz Frącz, Pawel Department of Faculty of Electrical Engineering Automatic Control and Informatics Opole University of Technology Prószkowska 76 Opole45-758 Poland

Issues undertaken in the paper concern improvement of the acoustic emission (AE) method used in the diagnosis of insulation systems of electric power equipment. When measuring AE signals generated by partial discharges (PD) in systems modeling their basic form, e.g. in paper-oil insulation of power transformers, different sources of acoustic interference signals may occur. The interferences may be generated by sources located inside the investigated insulation systems and also they may be emitted outside, in its vicinity. Acoustic interference signals superpose on the recorded AE waveforms emitted by PD and cause their distortion. This would have a direct impact on the correct evaluation of the measured signals obtained using the AE method. Thus, an analysis of the impact of interfering signals on usefully AE waveforms generated by PD was performed. Results of spectral analysis of recorded interferences, which included estimation of pseudo-spectra calculated using the MUSIC transform are presented in the paper. For the analyzes acoustic signals emitted by several common type interference sources that may occur during measurements under laboratory conditions were used. In the summary, the impact of the analyzed interferences on the achieved measurements results, i.e. AE pulses generated by basic forms of PD, is presented. © 2015 by ASME.

关键词： Partial discharges

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Data-Driven Process Monitoring and Fault Tolerant control in Wind Energy Conversion System with Hydraulic Pitch System

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Journal of Shanghai Jiaotong university(Science) 2015年第4期20卷 489-494页

作者：王凯罗浩 KRUEGER M DING S X 杨旭 JEDSADA S Institute for Automatic Control and Complex Systems University of Duisburg-Essen Baotou Vocational & Technical Collage School of Automation and Electrical Engineering University of Science and Technology Beijing Department of Electrical Engineering Faculty of Engineering Burapha University

Wind energy is one of the widely applied renewable energies in the world. Wind turbine as the main wind energy converter at present has very complex technical system containing a huge number of components,actuators and sensors. However, despite of the hardware redundancy, sensor faults have often affected the wind turbine normal operation and thus caused energy generation loss. In this paper, aiming at the wind turbine hydraulic pitch system, data-driven design of process monitoring(PM) and diagnosis has been realized in the wind turbine benchmark. Fault tolerant control(FTC) strategies focused on sensor faults have also been presented here, where with the implementation of soft sensor the sensor fault can be handled and the performance of the system is improved. The performance of this method is demonstrated with the wind turbine benchmark provided by Math Works.

关键词： data-driven process monitoring(PM) fault tolerant control(FTC) soft sensor wind turbine

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Optimal distributed control for platooning via sparse coprime factorizations

Optimal distributed control for platooning via sparse coprim...

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American control Conference (ACC)

作者： Şerban Sabău Cristian Oară Sean Warnick Ali Jadbabaie Electrical and Computer Engineering Dept. Stevens Institute of Technology Hoboken NJ Automatic Control Dept. University “Politehnica” Bucharest Faculty of the Computer Science Department Brigham Young University Electrical and Systems Engineering Dept. University of Pennsylvania

We introduce a novel distributed control architecture for disturbances attenuation in heterogeneous platoons of linear and time-invariant autonomous agents that inherits the performance achievable by the leader-follower control policies. We provide a Youla-like parameterization for the class of all distributed controllers such that the sparsity constraints are imposed on the controllers' left coprime factors, outlining a new concept of structural constraints in distributed control. The proposed scheme lends itself to optimal controller design via norm based costs, it guarantees string stability and completely eliminates the accordion effect from the behavior of the platoon. The distributed controller is proven to attain global optimality for heterogeneous platoons and ℋ 2 costs and can easily reconfigure such as to remain optimal during formation merging/exiting maneuvers. The scheme is amenable to a GPS time base synchronization mechanism, allowing for the exact compensation of the time delays induced by the wireless communications.

关键词： Vehicles Standards Decentralized control Stability analysis Linear systems Transfer functions Electronic mail

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Testing designing an electrical device compliant with the electromagnetic compatibility directive

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IOP Conference Series: Materials Science and engineering 2017年第1期227卷

作者： M Płaczek M Maćkowski P Nowak Silesian University of Technology Faculty of Mechanical Engineering Institute of Engineering Processes Automation and Integrated Manufacturing Systems Konarskiego 18A 44-100 Gliwice Poland Silesian University of Technology Faculty of Automatic Control Electronics and Computer Science Institute of Informatics Akademicka 16 44-100 Gliwice Poland

The goal of presented work was to build an electronic device in order to test the effectiveness of different EMC-improving solutions. Three EMC tests were done in order to check the created device compliance with the electromagnetic compatibility directive. Each of them was conducted for both industrial and non-industrial parameters (voltage and field strength), according to IEC PN-EN 61000 standards. Three tests were done: conductive immunity test in EM clamp, radiated immunity test in GTEM chamber, radiated emission test in GTEM chamber. Firstly, the device's conductive immunity was examined. The set of possible solutions was created by examining existing designs, papers, books and producers' recommendations. In result, different component configurations were chosen to determine the most EMC-effective one. Next, electromagnetic compatibility of proposed device configurations was tested in the GTEM chamber (radiated immunity and radiated emission). Tests results are presented on charts and analysed in order to verify if designed device face requirements of the electromagnetic compatibility directive. It was verify which of proposed electromagnetic compatibility improving solutions can solve problems with electromagnetic compatibility.

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The overlapping burden of the three leading causes of disability and death in sub-Saharan African children

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Nature Communications 2022年第1期13卷 1-14页

作者： Reiner, Robert C. Welgan, Catherine A. Troeger, Christopher E. Baumann, Mathew M. Weiss, Daniel J. Deshpande, Aniruddha Blacker, Brigette F. Miller-Petrie, Molly K. Earl, Lucas Bhatt, Samir Abolhassani, Hassan Abosetugn, Akine Eshete Abu-Gharbieh, Eman Adekanmbi, Victor Adetokunboh, Olatunji O. Aghaali, Mohammad Aji, Budi Alahdab, Fares Al-Aly, Ziyad Alhassan, Robert Kaba Ali, Saqib Alizade, Hesam Aljunid, Syed Mohamed Almasi-Hashiani, Amir Al-Mekhlafi, Hesham M. Altirkawi, Khalid A. Alvis-Guzman, Nelson Amare, Azmeraw T. Amini, Saeed Amugsi, Dickson A. Ancuceanu, Robert Andrei, Catalina Liliana Ansari, Fereshteh Anvari, Davood Appiah, Seth Christopher Yaw Arabloo, Jalal Aremu, Olatunde Atout, Maha Moh’d Wahbi Ausloos, Marcel Ausloos, Floriane Ayanore, Martin Amogre Aynalem, Yared Asmare Azene, Zelalem Nigussie Badawi, Alaa Baig, Atif Amin Banach, Maciej Bedi, Neeraj Bhagavathula, Akshaya Srikanth Bhandari, Dinesh Bhardwaj, Nikha Bhardwaj, Pankaj Bhattacharyya, Krittika Bhutta, Zulfiqar A. Bijani, Ali Birhanu, Tesega Tesega Mengistu Bitew, Zebenay Workneh Boloor, Archith Brady, Oliver J. Butt, Zahid A. Car, Josip Carvalho, Felix Casey, Daniel C. Chattu, Vijay Kumar Chowdhury, Mohiuddin Ahsanul Kabir Chu, Dinh-Toi Coelho, Camila H. Cook, Aubrey J. Damiani, Giovanni Daoud, Farah Gela, Jiregna Darega Darwish, Amira Hamed Daryani, Ahmad Das, Jai K. Davis Weaver, Nicole Deribe, Kebede Desalew, Assefa Dharmaratne, Samath Dhamminda Dianatinasab, Mostafa Diaz, Daniel Djalalinia, Shirin Dorostkar, Fariba Dubljanin, Eleonora Duko, Bereket Dwyer-Lindgren, Laura Effiong, Andem El Sayed Zaki, Maysaa El Tantawi, Maha Enany, Shymaa Fattahi, Nazir Feigin, Valery L. Fernandes, Eduarda Ferrara, Pietro Fischer, Florian Foigt, Nataliya A. Folayan, Morenike Oluwatoyin Foroutan, Masoud Frostad, Joseph Jon Fukumoto, Takeshi Gaidhane, Abhay Motiramji Gebrekrstos, Hailemikael Gebrekidan G. K. Gebremeskel, Leake Gebreslassie, Assefa Ayalew Gething, Peter W. Gezae, Kebede Embaye Ghadiri, Keyghobad Ghashghaee, Ahmad Golechha, Mahaveer Gubar Institute for Health Metrics and Evaluation University of Washington Seattle WA United States Department of Health Metrics Sciences School of Medicine University of Washington Seattle WA United States Malaria Atlas Project University of Oxford Oxford United Kingdom Imperial College London London United Kingdom Department of Laboratory Medicine Karolinska University Hospital Huddinge Sweden Research Center for Immunodeficiencies Tehran University of Medical Sciences Tehran Iran Department of Public Health Debre Berhan University Debre Berhan Ethiopia Department of Clinical Sciences University of Sharjah Sharjah United Arab Emirates Population Health Sciences King’s College London London United Kingdom Centre of Excellence for Epidemiological Modelling and Analysis Stellenbosch University Stellenbosch South Africa Department of Global Health Stellenbosch University Cape Town South Africa Department of Epidemiology and Biostatistics Qom University of Medical Sciences Qom Iran Faculty of Medicine and Public Health Jenderal Soedirman University Purwokerto Indonesia Mayo Evidence-based Practice Center Mayo Clinic Foundation for Medical Education and Research Rochester MN United States John T. Milliken Department of Internal Medicine Washington University in St. Louis St. Louis MO United States Clinical Epidemiology Center Department of Veterans Affairs St Louis MO United States Institute of Health Research University of Health and Allied Sciences Ho Ghana Department of Information Systems College of Economics and Political Science Sultan Qaboos University Muscat Oman Infectious and Tropical Disease Research Center Hormozgan University of Medical Sciences Bandar Abbas Iran Department of Health Policy and Management Kuwait University Safat Kuwait International Centre for Casemix and Clinical Coding National University of Malaysia Bandar Tun Razak Malaysia Department of Epidemiology Arak University of Medical Sciences Arak Iran Medical Research Center

Despite substantial declines since 2000, lower respiratory infections (LRIs), diarrhoeal diseases, and malaria remain among the leading causes of nonfatal and fatal disease burden for children under 5 years of age (under 5), primarily in sub-Saharan Africa (SSA). The spatial burden of each of these diseases has been estimated subnationally across SSA, yet no prior analyses have examined the pattern of their combined burden. Here we synthesise subnational estimates of the burden of LRIs, diarrhoea, and malaria in children under-5 from 2000 to 2017 for 43 sub-Saharan countries. Some units faced a relatively equal burden from each of the three diseases, while others had one or two dominant sources of unit-level burden, with no consistent pattern geographically across the entire subcontinent. Using a subnational counterfactual analysis, we show that nearly 300 million DALYs could have been averted since 2000 by raising all units to their national average. Our findings are directly relevant for decision-makers in determining which and targeting where the most appropriate interventions are for increasing child survival. © 2022, The Author(s).

关键词： Biogeography Epidemiology Infectious diseases Malaria

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Sensitivity of a thermal model of the PMSM to uncertainty in estimation of a heat transfer coefficient

Sensitivity of a thermal model of the PMSM to uncertainty in...

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Selected Problems of electrical engineering and Electronics (WZEE)

作者： Piotr Mynarek Marcin Kowol Marian Łukaniszyn Faculty of Electrical Engineering Automatic Control and Informatics Opole Poland

This paper presents a new method for estimation of the heat transfer coefficient from the motor housing, with application to a synchronous machine with permanent magnets (PMSM). Sensitivity of a thermal model of the motor to the measurement uncertainties in the estimated coefficient is effectively analysed. In order to validate correctness of the calculation results, measurements on the physical model of the machine are carried out.

关键词： Heat transfer Synchronous motors Resistance heating Permanent magnet motors Temperature measurement Mathematical model

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Weak Resilience of Networked control Systems

Weak Resilience of Networked Control Systems

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European control Conference

作者： Tomonori Sadamoto Henrik Sandberg Bart Besselink Takayuki Ishizaki Jun-ichi Imura Karl Henrik Johansson Department of Mechanical and Environmental Informatics Graduate School of Information Science and Engineering Tokyo Institute of Technology 2-12-1 Meguro Tokyo Japan School of Electrical Engineering Automatic Control Royal Institute of Technology (KTH) SE-100 44 Stockholm Sweden

ISBN: (纸本)9781509025923

In this paper, we propose a method to establish a networked control system that maintains its stability in the presence of certain undesirable incidents on local controllers. We call such networked control systems weakly resilient. We first derive a necessary and sufficient condition for the weak resilience of networked systems. Networked systems do not generally satisfy this condition. Therefore, we provide a method for designing a compensator which ensures the weak resilience of the compensated system. Finally, we illustrate the efficiency of the proposed method by a power system example based on the IEEE 14-bus test system.

关键词： Weak Resilience Networked control Systems proposed method

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