Graphical Environment Research Articles

ANALYSIS OF VOLTAGE NON-SINUSIDALITY IN POWER SUPPLY SYSTEMS WITH INDUCTION HEATING UNITS

The importance of the problem of improving the quality of electrical energy grew along with the development and widespread introduction of various high-performance technological installations in production, such as arc steel-making furnaces, welding installations, induction furnaces, etc. in accordance with the requirements of the standard GOST 30804.4.7–2013 and in accordance with the measurement program. A method for processing the research results obtained during the experiment is described. All power quality indicators are processed using computer programs created in the Labview graphical programming environment. The analysis of indicators of the quality of electrical energy to the requirements of GOST 32144-2013 was carried out, according to the results of which conductive low-frequency electromagnetic interference was detected in the 0.4 kV electrical network according to the coefficient of the n-th harmonic voltage components. The obtained values ​​of the indicators of the quality of electrical energy, characterizing the coefficient of the n-th harmonic components of the voltage, confirm the need to use technical means to reduce the influence of higher harmonics on electrical networks.

Designing an Interactive Graphical Electronic Environment Using (Ipad) to Develop Mathematical Concepts for Kindergarten Children

The aim of the current research is to identify Designing an interactive graphical electronic environment using (iPad) to develop mathematical concepts for kindergarten children.

Teaching Random Variables

This paper presents demo program for teaching random variables dedicated to demonstration and visualization of behaviour of the product of m independent uniform random variables. The demo is used as a complementary tool in the teaching Random signals and processes curriculum at the graduate level. The demo is made in MATLAB and utilizes all benefits provided by MATLAB, such as simplicity, and good graphic environment, interactive use, among others. Additionally, this demo is used with other demo programs, also made in MATLAB, in teaching/learning process of random variables. Students were very satisfied with this demo program expressing that helped them understanding better the behaviour of the product of uniform random variables.

Computer-Aided Design of the Robotic Platform Control System Using Adams and Matlab

Purpose of research. The purpose of this study is to assess the possibility of developing and simulating an optimal control system for the longitudinal movement of a robocars according to the criterion of maximum speed by using the MSC.Adams virtual modeling system and the MATLAB mathematical modeling package Methods. One of the research approaches is system modeling, while a virtual modeling system is used as a software tool for synthesizing a virtual physical model of a robot, and a package of application programs for solving technical computing problems MATLAB and a graphical environment for simulation Simulink are used to model a control system. The Pontryagin maximum principle is used as a synthesis method for the longitudinal displacement control system, and the maximum speed is used as an optimality criterion. Results: The structure of the control system for a robotic platform is presented; an optimal control algorithm is developed and implemented in the Simulink environment. The structure of the physical model management system with data transfer to Adams has been developed. The acceleration curves and the phase portrait of the model control system during the longitudinal movement of the robotic platform are presented and analyzed. Conclusion. As can be seen from the above simulation results, the optimal positional control law, which implements the maximum principle, fulfills the task with the required quality indicators. In this regard, the proposed algorithm can be used in the development of control systems for the longitudinal movement of mobile robots. Joint modeling of the virtual prototype and the object control system in the Matlab and Adams environment avoids the production of a fullscale model and makes it possible to take into account the physical properties of the object without creating an analytical model.

Surge arrester operation investigation in low‐ and high‐current regions using MATLAB GUI: Implementing an educational goal for undergraduate students

AbstractMetal oxide surge arresters (MOSAs) have been widely used as protective devices against switching and lightning overvoltages in power electrical systems. MOSAs have dynamic characteristics in low‐ and high‐current regions. The unique model of MOSA, which is able to evaluate all the possible operating conditions of power systems, would surely be so complicated. Therefore, by the selection of an operating condition, the appropriate model of MOSA has been created. Many parameters affect MOSA performance in low‐ and high‐current regions. As a result, MOSA's performance under different operating conditions has been investigated by using a MATLAB GUI environment. To make a software environment to simulate MOSA performance in a high voltage laboratory, temperature variations influence on leakage current and its harmonic components under power frequency applied voltages and also the efficacy of impulse parameters variations on MOSA's residual voltage have been investigated. The designed graphical environment has been used by 40 electrical engineering students. The results showed that the use of the graphical environment had a great impact on the concepts' understanding of MOSA's performance.

Daran robot, a reconfigurable, powerful, and affordable robotic platform for STEM education

<p style='text-indent:20px;'>Robot and programming education, as a key part of STEM education, is attracting more and more attention in the education industry. In this paper, a novel open-sourced educational robotic platform, <i>Daran</i> robot, is proposed with key features in terms of reconfigurable, powerful, and affordable. As an entry-level robotic platform, the <i>Daran</i> robot consists of three individual robots, which are a Mecanum-wheeled robot, a three-wheeled robot, and a 4-DoF robot arm. Both graphical and Python programming environments are developed for students with different entry levels. Thanks to the reconfigurability, four classic constructions of the <i>Daran</i> robot are presented with corresponding case studies, based on which the students can practically learn basic knowledge of sensing and control technologies.</p>

ТРЕХМЕРНОЕ КАРТОГРАФИРОВАНИЕ МЕСТНОСТИ

The article discusses new ideas in the field of three-dimensional representation of geographical space. 3D-mapping is defined as the most effective way to display the surrounding area. In particular, the advantages of three-dimensional maps in comparison with two-dimensional analogues are given, the current state of the field of 3D-representation is analyzed, and two approaches are identified: car-tography and geovisualization. The technique of 3D-mapping, as well as various existing graphical en-vironments for creating 3D-maps, and a comparative analysis of their capabilities are considered. For practical work, a graphic editor based on the game engine was selected with a justification for its use and a description of its functional fea-tures. The creation of a three-dimensional map of the area is implemented, the results are presented as illustrations of real and simulated territory. Potential applications of the 3D-map in various fields of activity are identified.

Monitoring of the Water Eutrophycation Process in Red Lake, from Harghita County, Romania

The main problem of freshwater lakes in the world, eutrophycation represents the over-enrichment of water by nutrients (nitrogen, phosphorus) and has emerged as one of the leading causes of surface water quality impairment. It is a rapidly growing environmental crisis, and worldwide, the number of coastal areas impacted by eutrophycation phenomenon stands at over 500. This important pollution process sets off a chain reaction in the ecosystem, starting with an overabundance of algae and other aquatic plants, excess which eventually decompose, producing large amounts of carbon dioxide. This paper is the result of researches located in Romania, performed over a period of eight years (2012-2019), in the area of a representative natural dam lake of the country - Red Lake, from Harghita County. Our researches aimed the quality parameters of the Red Lake water, the eutrophication process indicators, and their over time evolution. In order to predict the evolution of the studied pollution phenomenon in time, we used the software package “Surface-water Modeling System SMS 13.0” – the complete surface water solution, which was approached for the first time by Aquaveo. This software provides a comprehensive graphical environment for numerical modeling of eutrophycation, and tools for site characterization, model conceptualization and graphical visualization.

Konfigurisanje virtuelnog prototipa BiSCARA robota

The paper presents the configuring of a virtual prototype BiSCARA robot generated on the basis of a fully developed kinematic model of the robot. The virtual CAD model developed in this way will enable its implementation in the Python graphical environment as an integral part of the open architecture control system developed on the basis of the presented kinematic model. The developed kinematic model included solving the inverse and direct kinematic problem, determining the Jacobian matrix and workspace analysis. Verification of the kinematic model, i.e. the configured virtual prototype of the robot, was performed by simulations of the end-effector tip movement according to the given program in a CAD / CAM environment.

EDM GAP MODELING AT ELECTRICAL DISCHARGE GRINDING WITH CHANGE OF ELECTRIC POLARITY

The paper presents an experimental study and modeling in the Simulink graphical environment of the EDM gap at electrical discharge grinding (ED grinding) with change of electric polarit of difficult-to-machine materials. Based on the experimentally obtained oscillograms of currents and voltages in the cutting zone, an EDM gap model has been developed, which implements the nonlinear dependence of the active resistance of the electroerosion gap on its value, which makes it possible to take into account the effect of the interelectrode environment on the parameters of electric discharge pulses. Comparison of the calculated oscillograms obtained in the Simulink model with the experimental ones has shown that during ED grinding, the developed EDM gap model adequately reflects the real electrical processes occurring in the electroerosion gap.

ANALYSIS OF THE RESULTS OF THE FORMATIVE STAGE OF THE PEDAGOGICAL EXPERIMENT ON THE INTRODUCTION OF THE MODEL OF BACHELOR TRAINING IN CYBER SECURITY IN THE CONDITIONAL AND DIGITAL ENVIRONMENT

The article presents an analysis of the results of the formative stage of the pedagogical experiment on the implementation of the model of training bachelors in cybersecurity in an educational and digital environment. It is noted that bachelors in cybersecurity were provided with training technology in courses of this type, in particular, provided methods and electronic support, interactive lectures, audiobooks, presentations on specialized disciplines, video lectures, online broadcasts, electronic online calculators, mass and distance learning, YouTube channels with interactive self-assessment, online programming simulators, collaborative educational platforms, collaborative learning in mobile applications, collaborative online platforms, virtual models and online labs, three-dimensional graphics environment for visual programming, data processing, chatbots. The study was carried out in compliance with a number of requirements, the main of which are: compliance with the methodology and timing of the experiment (duration in time, the implementation of the correction of the organization and reproduction of results); substantiation of the experimental base of the research. The experimental work was carried out for five years. 879 bachelors in cybersecurity took part in the experiment. The obtained results of the formed readiness of bachelors in cybersecurity in the conditions of educational and digital environment according to certain criteria in control and experimental groups before and after the experiment are considered. Levels of readiness of bachelors in cybersecurity in the educational-digital environment for professional activity by motivational, integration, activity-operational and creative criteria in control and experimental groups before and after experimental research are presented in the form of spreadsheets. The obtained results of the experimental study provide an opportunity to assert that the constructive model of training bachelors in cybersecurity in the educational-digital environment is effective

Development of FRIMAN – Supporting Tool for Object Oriented Programming Teaching

Abstract The main goal of this contribution is to present the current developmental state of FRIMAN – the graphical development environment designed to support the teaching process of the object-oriented paradigm. FRIMAN project has two main purposes: 1. simplifying the understanding of the basics of the object-oriented programming for JAVA language beginners, 2. teaching students of applied informatics to collaborate in bigger project development. Therefore, an application called FRIMAN has been developed at the Faculty of Management Science and Informatics at the University of Žilina. This project is developed by students of Master degrees under the leaderships of experienced software developers. The suggested system consists of several modules. In this paper, we focus on the description of selected modules and their current functionality as well as description of future plans for this project and brief description of FRIMAN development process. Attention is paid to a module for class management and a graphical code editor, which enables the creation of method bodies using flow diagrams without the necessity of programming language syntax knowledge. Based on good evaluation by the development team preparing changes in the high school education process, the current application is planned to be applied in practice.

Evolutionary Sequence Analysis and Visualization with Wasabi.

Wasabi is an open-source, web-based graphical environment for evolutionary sequence analysis and visualization, designed to work with multiple sequence alignments within their phylogenetic context. Its interactive user interface provides convenient access to external data sources and computational tools and is easily extendable with custom tools and pipelines using a plugin system. Wasabi stores intermediate editing and analysis steps as workflow histories and provides direct-access web links to datasets, allowing for reproducible, collaborative research, and easy dissemination of the results. In addition to shared analyses and installation-free usage, the web-based design allows Wasabi to be run as a cross-platform, stand-alone application and makes its integration to other web services straightforward.This chapter gives a detailed description and guidelines for the use of Wasabi's analysis environment. Example use cases will give step-by-step instructions for practical application of the public Wasabi, from quick data visualization to branched analysis pipelines and publishing of results. We end with a brief discussion of advanced usage of Wasabi, including command-line communication, interface extension, offline usage, and integration to local and public web services. The public Wasabi application, its source code, documentation, and other materials are available at http://wasabiapp.org.

Graphic Development Environment in Interactive Computer Interior Design

In the process of interactive design generally through the interior design graphics to achieve customer needs, interactive design is a new type of green design system, at present, has been widely used in computer web production, industrial product design, furniture manufacturing and other fields. With the continuous development of computer technology, the human-computer interaction problem is gradually reflected. In order to effectively solve this problem, we add the concept of interaction design into the field of architectural design. The interactive design is combined with the characteristics of architectural design to analyze the architectural design. In this paper, the composition, technology platform and operation mode of the interactive design system are analyzed and studied, and the residential building technology is discussed from these three aspects. In addition, it is applied to the actual case, through the use of digital design, numerical control processing simulation experiment, image experiment and other scientific research methods, the residential building space environment design experimental study. This will also lead to reference standards for green interior design of public and industrial buildings.

ADEQUACY EVALUATION OF THE SYNTHESIS OF MATHEMATICAL MODELS FOR ONE CLASS OF LINEAR DYNAMIC SYSTEMS WITH PARAMETERS, VARIABLE IN TIME AND IN SPACE

The object of research: the authors of this work have synthesized in previous publications a mathematical model of one class of linear dynamic systems with variable parameters in time and space, which includes the system for lifting and lowering a load with a crane in the case of taking into account the influence of longitudinal vibrations that arise in the cable of the lifting mechanism, and shift in time of the moment of inertia of the rotating masses reduced to the motor shaft. Investigated problem: simulation models are synthesized in the Simulink graphical software environment of the MATLAB application package to assess the adequacy of the specified mathematical model. A calculation was carried out using the passport data and characteristics of all components of the crane structure to find the numerical values of the parameters of simulation models, including the electric motor, cable and gearbox. The main scientific results: the results of modeling the dynamics of the electric drive system during acceleration, deceleration, the prevailing velocity are given. By comparing the results obtained on the simulation model with the results of experimental studies of the same class of dynamical systems carried out by other authors, the adequacy of the mathematical models synthesized by the authors of this work is proved. It is proved that the use of the classical equation of the dynamics of the electric drive system, which contains a constant moment of inertia and a constant moment of load, leads to errors in the estimates of the processes accompanying the lifting and lowering of loads by cranes. And this, in turn, does not allow predicting the behavior of the system in various operating modes with sufficient accuracy. The area of practical use of the research results: enterprises of the machine-building industry, specializing in the production, modernization of lifting equipment. Innovative technological product: a simulation model of a crane mechanism, which makes it possible to take into account the influence of longitudinal vibrations that arise in the cable of the hoisting mechanism, and the shift in time of the moment of inertia of the rotating masses reduced to the motor shaft. Scope of application of the innovative technological product: design and development of control systems for electric drives of lifting equipment.

PetriNet Editor + PetriNet Engine: New Software Tool For Modelling and Control of Discrete Event Systems Using Petri Nets and Code Generation

Petri nets are an important tool for creation of new platforms for digitised production systems due to their versatility in modelling discrete event systems. For the development of modern complex production processes for Industry 4.0, using advanced mathematical models based on Petri nets is an appropriate and effective option. The main aim of the proposed article is to design a new software tool for modelling and control of discrete event systems using Arduino-type microcontrollers and code generation techniques. To accomplish this task, a new tool called “PetriNet editor + PetriNet engine” based on Petri nets is proposed able to generate the code for the microcontroller according to the modelled Petri net. The developed software tool was successfully verified in control of a laboratory plant. Offering a graphical environment for the design of discrete event system control algorithms, it can be used for education, research and practice in cyber-physical systems (Industry 4.0).

Application of PLC based smart microgrid controller for sequential load restoration during station blackout of nuclear power plants

Post Fukushima nuclear disaster, the distributed energy resources (DERs) based integrated microgrid (IMG) is under consideration as an alternative source to strengthen the station blackout power supply in nuclear power plants. The complete IMG blackout during switching over from on-grid to islanded mode is still an outstanding issue. The biggest challenge is power restoration to loads within 3 min of time after making black-start operation of DERs. A conceptual design of programmable logic controller based smart microgrid controller is proposed in this research to meet these challenges. In addition to it, a suitable protection scheme is also suggested to avoid transitional collapse of safety power supply. The concepts of black-start and sequential load restoration process are validated by using PSCAD/EMTDC simulation platform, a widely used power system transient and switching operation analysis tool. This software allows the users to assemble the circuit graphically, run the simulation, analyze the results, and manage the data in a completely integrated graphical environment. Based on the analysis reported in this paper, it is observed that the fluctuations in voltage and frequency are high during black-start operation. Hence, power electronics based soft starter is suggested to overcome these issues.

Maksimum Güç Noktası İzleme Tekniklerinde Uygulanan LabVIEW Tabanlı Modelleme Sistemi

Fotovoltaik, güneş ışığını doğrudan elektriğe dönüştürme işlemidir. İlk yatırım maliyeti yüksek olsa da güneş enerjisi temiz ve yenilenebilir bir enerji kaynağı sunar. Fotovoltaik sistem kullanılarak elektrik enerjisi üretmek için; sistemin bulunduğu konum, ortam sıcaklığı ve dönüşüm sisteminin verimliliği gibi parametrelerin bilinmesi sistemin optimum çalışabilmesi için önemlidir. Bu sistemler tek panel ile kullanılabildiği gibi büyük enerji santrallerinde çok sayıda panelin birbirine bağlanması ile de kullanılabilir. Bu tarz bir sistem oluşturulurken hücrelerin güneşten aldığı enerjiye göre ürettiği gerilim ve akım değerleri kritik derecede önemlidir. Bu sistemlerin maksimum verimde çalışabilmesi için, sistem performansının analiz edilebildiği bir izleme sistemi kullanmak, fotovoltaik sistem tarafından üretilen enerji miktarını gerçek zamanlı olarak takip edebilmek ve öngörülen dönüşüm verimliliğinin, maksimum güç noktasını belirlemek son derece mühimdir. Bu çalışmada, LabVIEW programı kullanılarak fotovoltaik hücrelerin karakteristikleri, sistemin ürettiği elektrik enerjisi ve maksimum güç noktasının belirlenmesi için gerçek zamanlı ölçümlerin laboratuvar ortamında yapılması amacıyla kullanılacak bir donanım ve yazılım geliştirilmiştir. LabVIEW, endüstriyel olarak veri toplama sistemleri, test ve ölçüm cihazları gibi ihtiyaçları karşılamak için sıklıkla kullanılmaktadır. Sistemde kullanılan sensörlerden gelen bilgi, maksimum güç noktası izleme cihazı olarak kullanılan DC-DC dönüştürücüsünden okunmuştur. Elde edilen tüm veriler LabVIEW’ın arayüzünde, donanımda kullanılan mikrodenetleyiciye bağlı sensörlerden ve toplanan verilerin analiz edilebilmesi için LabVIEW ortamında hazırlanan görsel arayüz programı vasıtasıyla izlenmiştir. Önerilen sistem analiz ve veri toplama uygulamalarında kabul edilebilir bir performansa sahip olduğu görülmüştür.

GRAFIS LINGKUNGAN WISATA AIR PANAS SEMURUP

In Semurup Hot spring tourism is located in Kerinci district. In the days of occupation dutch indies, Semurup Hot springs totally used by the dutch indies as a bathhouse army troops. Bathhouse hot water in this tourism has many benefits that efficacious cure diseases. In Semurup Hot spring tourism itself is have two spots hot springs separate , including hot springs 1 and 2 with various facilities and has plenty of hot springs. In Semurup Hot spring tourism it has no means of public information inadequate. In this case is necessary information systems and system a good sign of graphic environment , to simplify tourists in identifying facilities about what can and cannot approached by tourists, as hot springs at the hot water temperatures 90° C more. The presence of a media application of Environmental Graphics, overall information about places, buildings, facilities and so forth can be well ordered.

Minimalism as a strategy for overcoming information overload of interface design for interactive city devices

The article is devoted to the consideration of the issues of forming a comfortable urban information environment using graphic design, namely, minimalism as a strategy for organizing visual information obtained through interaction with interactive interfaces in the urban environment. In modern megacities, devices with a touch screen increasingly provide the organization of the process of information interaction between a city and a person. From a visual point of view, they provide ample opportunities for the implementation of a graphic form. However, at the same time, the question remains to what extent the visual design of the software of urban information carriers affects the efficiency of their use, and how their aesthetic characteristics form the information and graphic ecology of the city. In recent years, the information space has expanded significantly; therefore, the organization of an environmentally friendly urban graphical environment has turned out to be associated with the need to apply approaches to organizing data that can reduce information and visual noise, as well as reduce the level of information pollution of the surrounding urban environment. This circumstance, on the one hand, enhances the importance of interaction design as a primary stage in creating an effective information design. On the other hand, it promotes a conscious restriction in the use of graphical tools, reflecting an ethical approach to interface design.