<abstract xmlns="http://www.w3.org/1999/xhtml">The mathematical model of the three-dimensional crane using the Euler-Lagrange approach is derived. A state-space representation of the derived model is proposed and explored in the Simulink® environment and on the laboratory stand. The obtained control design was simulated, analyzed and compared with existing encoder-based system provided by the three-dimensional (3D) Crane manufacturer Inteco®. As well, an anti-swing fuzzy logic control has been developed, simulated, and analyzed. Obtained control algorithm is compared with the existing anti-swing proportional-integral controller designed by the 3D crane manufacturer Inteco®. 5-degree of freedom (5DOF) control schemes are designed, examined and compared with the various load masses. The topicality of the problem is due to the wide usage of gantry cranes in industry. The solution is proposed for the future research in sensorless and intelligent control of complex motor driven application.</abstract>

Doctoral student, Tallinn University of Technology

Professor, Tallinn University of Technology

Associate professor, Tallinn University of Technology

Three-Dimensional Crane Modelling and Control Using Euler-Lagrange State-Space Approach and Anti-Swing Fuzzy Logic

<abstract xmlns="http://www.w3.org/1999/xhtml">The paper describes the application of supercapacitor energy storage system for induction traction drive test bench that replaces a real electric public transport for performing testing and researches. The suitability and usage of such bench for research purposes is explained and the importance of the development of software mathematical model for performing simulations to be done before physical implementation measures is reasoned. The working principle of the bench and applied components are described. A virtual model of the bench was built and simulations were performed using Matlab/Simulink software. The basic topology of the virtual bench model is described as well. The calculations of this work show the scaling of supercapacitor energy storage system by setting different limits of working voltage range in order to adjust them to test bench parameters, whereas the modelling compares two simulation cases – the application of less supercapacitors and the application of more supercapacitors with the same common rated voltage. The autonomous mode simulations were also performed. Simulation results are analyzed and recommendations for the application of the supercapacitor energy storage system, with respect to initial supercapacitor circuit voltage, are given.</abstract>

Doctoral student, Riga Technical University

Associate Professor, Riga Technical University

Lead Researcher, Riga Technical University

Simulation of Induction Traction Drive with Supercapacitor Energy Storage System Test Bench

<abstract xmlns="http://www.w3.org/1999/xhtml">The paper is devoted to the centrifugal pumps represented the most popular type of pumping equipment used in different areas. The pressure control approach for variable speed driven (VSD) parallel connected centrifugal pumps is reported. The goal of the study is optimization of some quality indices, such as efficiency, consumed power, productivity, energy carrier temperature, heat irradiation, etc. One of them – efficiency – has been studied in the paper more carefully. The mathematical model of pumping process is discussed and a vector-matrix description of the multi-pump application is given. The program-based pressure control system is developed which productivity is changed by regulating the number of working pumps. The paper introduces new pressure control algorithms based on the working point estimation intended for programmable logical controllers (PLC). Experiments prove correctness of the offered methodology.</abstract>

Associate Professor, St. Petersburg Electrotechnical University

Associate Professor, Tallinn Technical University

PhD student, Tallinn University of Technology

PLC-Based Pressure Control in Multi-Pump Applications

<abstract xmlns="http://www.w3.org/1999/xhtml">The complex initial permeability (CIP) as a function of frequency is one of the main properties of ferrites. This characteristic (CIP) is measured experimentally, therefore there can be found noisy, doubtful or incomplete parts of the spectrum. Thus there is a need for a method of evaluation of quality of CIP. In this article for evaluation of the quality of experimental CIP spectra of polycrystalline ferrite materials the KKR (Kramers-Kronig relations) are used. In order to apply KKR to experimentally measured data (i.e. data with finite limits) the method of transforming these integral relations into summation relations with finite limits is developed and described. This method can be used only for CIP given over the wide frequency rage, so that the imaginary part of CIP is fully presented. Using KKR with the help of CIP spectra model (based on the effects coming from polycrystal grain sizes and defects distribution) partly removes aforementioned limit. Thus with the help of the model we can also make CIP spectra reconstruction (in cases when CIP is noisy or incomplete) and CIP spectra decomposition.</abstract>

Scientific assistant, Riga Technical University

The Use of Kramers-Kronig Relations for Verification of Quality of Ferrite Magnetic Spectra

<abstract xmlns="http://www.w3.org/1999/xhtml">Power and energy measurement and monitoring is a key factor for many industries in terms of energy and cost efficiency evaluation. Due to trends of Smart Grid concept application in industrial environment, including decentralized DC-Grid implementation, for precise evaluation – faster and low-cost measurement equipment is needed. Manufacturing industry widely uses industrial robots that have dynamic load characteristics for which faster measurement equipment is needed.This paper gives a brief description of the developed power measurement equipment, its structure and interconnection with industrial Profinet network. Further as a testing method steady state and dynamic loads are selected and analyzed. For testing, specially created industrial DC-Grid testing environment and equipment was used. Testing results show that the selected method and idea is working and is able to measure dynamic loads with high resolution. For other industrial load types there is a discussion going on about the issue of how detailed the resolution is needed in industrial SmartGrids, as energy forecast is a new trend in robotic industry and manufacturing planning.</abstract>

Power Measurement and Data Logger with High-Resolution for Industrial DC-Grid Application

AHEAD OF PRINT

Volume 19 (2023): Issue 1 (June 2023)

Volume 18 (2022): Issue 1 (June 2022)

Volume 17 (2021): Issue 1 (June 2021)

Volume 16 (2020): Issue 2 (December 2020)

Volume 16 (2020): Issue 1 (January 2020)

Volume 15 (2019): Issue 2 (December 2019)

Volume 15 (2019): Issue 1 (September 2019)

Volume 14 (2018): Issue 2 (December 2018)

Volume 14 (2018): Issue 1 (July 2018)

Volume 13 (2017): Issue 1 (December 2017)

Volume 12 (2017): Issue 1 (July 2017)

Volume 11 (2016): Issue 1 (December 2016)

Volume 10 (2016): Issue 1 (July 2016)

Volume 9 (2015): Issue 1 (December 2015)

Volume 8 (2015): Issue 1 (July 2015)

Volume 7 (2014): Issue 1 (December 2014)

Volume 6 (2014): Issue 1 (October 2014)

Volume 5 (2014): Issue 1 (May 2014)

Volume 4 (2013): Issue 1 (December 2013)

Volume 3 (2013): Issue 1 (August 2013)

Volume 2 (2013): Issue 1 (April 2013)

Volume 1 (2012): Issue 1 (December 2012)

Electrical, Control and Communication Engineering

The aim of the Journal of Electrical, Control and Communication Engineering of Riga Technical University (RTU-ECCE Journal) is to provide an on-line forum for scientific discussions and feedbacks from the scientific society to particular scientists from all over the world on their later scientific achievements in the below mentioned fields.　The journal considers publication of all authors, but gives preference to the post-conference papers after one of the following events (International Scientific Conferences on Power and Electrical Engineering of Riga Technical University - RTUCON, Workshops on Advances in Information, Electronic and Electrical Engineering – AIEEE, International Doctoral School of Electrical Energy Conversion and Saving Technologies of Riga Technical University, Doctoral School of Energy and Geotechnology of TalTech), as well as the papers recommended by section editors of the journal. The submissions are reviewed, edited and published in the mentioned priority order.  The scope of RTU-ECCE journal includes (but not limited to) the following areas:    Electrical Engineering and Power Electronics:     Electrical machines, Apparatus, Drives, Motion Control and Robotics;    Components, Design and Application of Power Electronic Converters;    Electromagnetic Compatibility and Interference of Electrical Equipment;    Electrical Materials, Reliability and Diagnostics;    Medical and other Bio-contact Electrical Equipment.    Power and Energy Systems:     Power System Control, Automation, Stability and Protection;    Power Quality and Reliability;    Power Plants, Renewable and Distributed Energy Systems;    Power System Planning, Management, Economic Evaluation and Risk Assessment;    Electricity Market;    Smart Grids &amp; Microgrids.    Information Processing in the context of Electrical and Power Engineering     Electronic Circuits and Systems for Control Applications;    Control Theory, Analysis, Simulation and Implementation Software;    Principles of Physical Transmission and Processing of Information, New Interfaces and Protocols.    Microwave Technique and Antennas     Theory, Analysis and Simulation of Microwave Technique;    Software and Experimental Methods Dedicated for Microwave Equipment;    Antennas, Radar Systems and other Microwave Applications.  The editorial board of RTU-ECCE Journal is always open for discussion on the journal topics.   In 2012 the journal Electrical, Control and Communication Engineering separated from the RTU journal series Power and Electrical Engineering. Why subscribe and read  Electrical, Control and Communication Engineering is a peer-reviewed journal providing the latest information in the field of electrical engineering and information technologies. The journal focuses on recent research in electrical and control engineering paying special attention to the reports which have the most significant practical importance.The journal includes a wide range of publications on electrical and electronic equipment, as well as on other means for energy conversion, information processing and transmission purposes.  Why submit  The journal provides highly qualified feedback on the research, as well as international publicity. The editorial board will continuously care about the citation level of the journal.  Rejection Rate   30%   Archiving  Sciendo archives the contents of this journal in Portico - digital long-term preservation service of scholarly books, journals and collections.  Plagiarism Policy  The editorial board is participating in a growing community of Similarity Check System's users in order to ensure that the content published is original and trustworthy. Similarity Check is a medium that allows for comprehensive manuscripts screening, aimed to eliminate plagiarism and provide a high standard and quality peer-review process. 