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Using Artificial Neural Networks to Estimate the Equivalent Resistivity from typical Transmission Line Towers Grounding Arrangement in a Two-Layer Soil

Using Artificial Neural Networks to Estimate the Equivalent ...

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International Symposium on Lightning Protection (XII SIPDA)

作者： Raphael Batista João R. Souza Graduate Program in Automation and Control Engineering IFMG Betim MG Brazil Dept. of Electroeletronics and Computing CEFET-MG Alameda das Perdizes 61 Contagem MG Brazil

This paper presents a procedure to estimate a homogeneous equivalent resistivity for typical transmission line tower ground arrangements that are immersed in a stratified soil model. This technique is based on artificial neural network training due to a dataset developed in a numerical routine to compute grounding resistance. The results obtained from Levemberg-Marquadt algorithm and Bayesian regularization show good accuracy compared to the applied dataset and to the measurement data from a 230 kV transmission line, a practical case analyzed. We note medians lower than 5% and acceptable values of standard deviation for practical cases, which suggests that the proposed procedure can be used for real-world conditions.

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Synchronizing Sequences For Verification Of Finite State Machines

Synchronizing Sequences For Verification Of Finite State Mac...

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International Conference on Radio Electronics & Info Communications (UkrMiCo)

作者： Maryna Miroshnyk Olexander Shkil Elvira Kulak Dariia Rakhlis Yurii Pahomov Anatolii Miroshnyk dept. Specialized Computer Systems Ukrainian State University of Railway Transport Kharkiv Ukraine dept. Computer Engineering Design Kharkiv National University of Radio Electronics Kharkiv Ukraine dept. Automation and Control Technical Systems of the National Technical University "Kharkov Polytechnic Institute" Kharkiv Ukraine

ISBN: (数字)9781728126920

ISBN: (纸本)9781728126937

The method of detection and localization of design errors in HDL-models of finite state machines with arbitrary output functions was proposed. The diagnostic experiment is carried out bypassing all arcs of the Mealy machine, starting from the initial vertex, including for machines of the "non-exclusive" class. To ensure the return of the machine with a possible design error in the initial state, it is suggested to use synchronizing sequences. Diagnostic experiments were performed in the Active-HDL design environment.

关键词： Automata Decision trees Hardware design languages Simulation Finite element analysis Visualization Signal analysis

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Position Sensorless Field Oriented control of IPMSM Under Parameter Uncertainties

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IFAC-PapersOnLine 2017年第1期50卷 14501-14506页

作者： Akyol, Isa Eray Soylemez, Mehmet Turan Istanbul Technical University Control and Automation Engineering Dept. Istanbul34469 Turkey

Permanent magnet synchronous motors (PMSMs) are widely used in industry due to their high torque per volume ratio, low noise, efficiency and wide stable operation region. Especially in home appliance applications, obtaining high torque using small motors and low audible noise has crucial importance. Therefore, conventional DC motors have been replaced by the permanent magnet synchronous motors in the modern applications. In this study, field oriented sensorless control over wide speed range is carried out under parametric uncertainties. The pole coloring concept is used for the control of a PMSM in an industrial setup for the first time. The design method and experimental results are presented. © 2017

关键词： Sensorless control DC motors Domestic appliances Permanent magnets Robust control State estimation Synchronous motors Vector control (Electric machinery) Appliance applications Parameter uncertainty Parametric uncertainties Permanent magnet motor Permanent Magnet Synchronous Motor Permanentmagnet synchronous motor (PMSMs) Position sensorless Uncertain dynamic systems

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Removal notice to "VitSeg: Weakly supervised vitiligo segmentation in skin image" [Comput. Med. Imag. Graph. 85 (2020) 101779]

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Computerized medical imaging and graphics : the official journal of the Computerized Medical Imaging Society 2021年 91卷 101954页

作者： Zhangxing Bian Siyu Xia Chao Xia Ming Shao Key Laboratory of Measurement and Control of CSE Ministry of Education School of Automation Southeast University Nanjing China Electrical Engineering and Computer Science University of Michigan Ann Arbor MI USA. Key Laboratory of Measurement and Control of CSE Ministry of Education School of Automation Southeast University Nanjing China. School of Electronics Information and Electrical Engineering ShangHai Jiao Tong University Shanghai China. Dept. of Computer and Information Science University of Massachusetts Dartmouth Dartmouth MA USA.

This article has been removed: please see Elsevier Policy on Article Withdrawal (https://***/about/our-business/policies/article-withdrawal). This article has been removed at the request of the Authors and Editor-in-Chief because complete consent was not obtained by the authors in accordance with journal policy prior to publication. The authors and the journal sincerely apologize for this oversight.

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Estimation of Grounding Resistance of Transmission Line Towers based on Artificial Neural Networks: A Practical Analysis based on a developed Android App

Estimation of Grounding Resistance of Transmission Line Towe...

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International Symposium on Lightning Protection (XII SIPDA)

作者： Raphael Batista João R. Souza Graduate Program in Automation and Control Engineering IFMG R. Itaguaçu 595 Betim MG Brazil Dept. of Electroeletronics and Computing CEFET-MG Alameda das Perdizes 61 Contagem MG Brazil

This work presents a practical evaluation of an Android app developed for grounding resistance estimation of typical transmission line (TL) towers arrangement. Such arrangements, composed by counterpoise cables, are evaluated for a two-layered soil model by a trained artificial neural network (ANN), which derives in a significative low computational cost for the solution problem. The developed algorithm is evaluated with measurements made in TL towers and compared to the solution provided by a rigorous numerical routine. The results indicate a good accuracy, with median and standard deviation lower than 7%, of the developed app for conditions where the input parameters have values within the range used to training ANN. Values outside the specified range can reach significative errors up to 5 and 17 times, respectively, for median and standard deviation.

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An efficient 3D pedestrian detector with calibrated RGB camera and 3D LiDAR

An efficient 3D pedestrian detector with calibrated RGB came...

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2019 IEEE International Conference on Robotics and Biomimetics, ROBIO 2019

作者： Pang, Lei Cao, Zhiqiang Yu, Junzhi Liang, Shuang Chen, Xuechao Zhang, Weimin State Key Lab Management and Control for Complex Systems Institute of Automation CAS Beijing100190 China University of Chinese Academy of Sciences Beijing100049 China Dept. Mech. Eng. Sci. BIC-ESAT College of Engineering Peking University Beijing100871 China BAICIRS Beijing100081 China Intell. Robot. Inst. Beijing Inst. Technol. Beijing100081 China

ISBN: (纸本)9781728163215

Pedestrian detection plays an important role in the environmental perception and autonomous navigation for robotics, which provides critical information for the safe operation in complex environments. In this paper, a 3D pedestrian detector with calibrated LiDAR and RGB Camera is proposed, which takes full advantage of the precise range information of 3D LiDAR scanner and semantic information acquired from RGB image. The proposed approach integrates the segmented object clusters of point cloud and 2D bounding boxes generated by a visual object detector. The point cloud is segmented by a three-step segmentation approach, which can segment point cloud with both high precision and high efficiency. By fusion multi-sensor information in the image domain, the proposed approach provides 3D information of pedestrians in both LiDAR and camera coordinate systems. Experiments was conducted to evaluate the performance of the proposed approach. © 2019 IEEE.

关键词： Cameras

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Validation of an LTE backbone for inter-car communications in metro environments 12

Validation of an LTE backbone for inter-car communications i...

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12th European Conference on Antennas and Propagation, EuCAP 2018

作者： Díez, V. Val, I. García, J. Arriola, A. Echeverria, E. López, I. Korta, M. Zabala, I. Aubourg, T. Tichý, T. Communication Systems HW Platforms and Microsystems Dept. IK4-Ikerlan Arrasate-Mondragón Spain Research and Development Dept. CAF Beasain Spain Product Development Dept. CAF Power and Automation Donostia-San Sebastian Spain Control Application Engineering Dept. CAF Power and Automation Donostia-San Sebastian Spain Secured Wireless Products Thales Communications and Security S.A.S Gennevilliers France Research and Development Dept. Unicontrols a.s. Prague Czech Republic

ISBN: (纸本)9781785617911

The introduction of wireless systems to replace wired communications inside trains is currently being faced by the railway industry. Guaranteeing a reliable communication link is a challenge due to the dynamic behavior of the radiofrequency (RF) propagation channel. In this paper, an experimental validation of a Long Term Evolution (LTE) communications system is presented for a metro train backbone. Wireless channels are measured and characterized in different metro scenarios, and a channel emulator is used to recreate the physical RF propagation conditions in laboratory. Two functional scenarios are validated: the train inauguration and the data exchange between consists. Obtained results indicate that Doppler spread mainly influences the LTE uplink, cutting throughput up to 40 %. © Institution of engineering and *** Rights Reserved.

关键词： Electronic data interchange

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Closed Loop Fault Detectability Based on a Gap-Metric 2

Closed Loop Fault Detectability Based on a Gap-Metric

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2nd IEEE Conference on control Technology and Applications, CCTA 2018

作者： Sekunda, Andre Ding, Steven Kjolstad Poulsen, Niels Niemann, Henrik Department of Electrical Engineering Automation and Control Tech. University of Denmark Kgs. LyngbyDk-2800 Denmark Dept. of Automatic Control and Complex Systems University of Duisburg-Essen Duisburg47057 Germany Dept. of Applied Mathematics and Computer Science Tech. University of Denmark Kgs. LyngbyDk-2800 Denmark

ISBN: (纸本)9781538676981

Systems are often controlled using feedback loops. Fault diagnosis schemes are usually designed assuming that there is no feedback loop. Therefore fault diagnosis methods need to accommodate for the feedback loop. One such method is active fault diagnosis based on a fault signature system. This method is derived using the YJBK parametrisation, named after Youla, Jabr, Bongiorno and Kucera. It uses the derived fault signature system to determine the detectability of possible faults in the system. Deriving the fault signature system requires knowledge about the controller. This paper demonstrates the possibility of estimating the detectability of faults in the fault signature system using a gap-metric. The gap-metric has the advantage of only requiring knowledge about the plant. By using the gap-metric it is possible to estimate the detectability of faults without using information about the controller. © 2018 IEEE.

关键词： Fault detection

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Hyperbolic Tangent Adaptive LQR+PID control of a Quadrotor

Hyperbolic Tangent Adaptive LQR+PID Control of a Quadrotor

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International Conference on control, engineering & Information Technology (CEIT)

作者： Hayrettin Yavuz Serhat İkizoğlu Mechatronics Engineering Dept. Istanbul Technical University Istanbul Turkey Control and Automation Engineering Dept. Istanbul Technical University Istanbul Turkey

ISBN: (纸本)9781538676424

In this paper, an adaptive controller is proposed for attitude and altitude control of a quadrotor. First, mathematical and dynamic models of a quadrotor are analyzed. Next, PID and LQR controllers are designed separately. This step is followed by application of hyperbolic tangent weight function to increase the overall performance by selecting the proper controller at proper time. Finally, all the three controllers' performances are observed in Matlab Simulink simulation environment. Simulations show that adaptive controller's overall performance is remarkably superior to that of a single PID or LQR controller.

关键词： Rotors Force Mathematical model Torque Adaptation models control systems Acceleration

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Design and Application of a Polarity Changing Sinusoidal Inverter Switching at Fundamental Frequency for Distributed Energy Systems

Design and Application of a Polarity Changing Sinusoidal Inv...

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International Conference on Smart Energy Systems and Technologies (SEST)

作者： Hïseyin Akdemir Yavuz Eren A.R. Boynueğri Dept. of Electrical Engineering Yildiz Technical University Istanbul Turkey Dept. of Control and Automation Engineering Yildiz Technical University Istanbul Turkey

Renewable energy management and conditioning system for distributed generation (DG) has been a promising research topic due to the advantages on efficiency, energy quality and environmental effects. Recently, it has been emerged as an efficient tool to meet the demand by residential loads. There have been presented numerous studies about the integration of DG units with hybrid configurations of energy storage systems and renewable sources to supply the domestic loads via single phase inverters. In this paper, a novel operation strategy of a single phase inverter for DG systems has been proposed. The essential point of the proposed strategy has been based on to generate a rectified sinusoidal waveform on DC bus contrary to the conventional methods. The proposed operation strategy has been tested on Matlab ® /Simulink environment and then it has been verified by an experimental study.

关键词： Inverters Batteries Voltage control Buck converters Switches Switching frequency

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