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The paper deals with design and analysis of a variable-gain amplifier (VGA) working with a very low supply voltage, which is targeted for low-power applications. The proposed amplifier was designed using the bulk-driven approach, which is suitable for ultra-low voltage circuits. Since the power supply voltage is less than 0.6 V, there is no risk of latchup that is usually the main drawback of bulk-driven...
This paper presents a laboratory model of synchronous generator excitation system based on National Instruments cRIO real-time industrial controller. It was specially designed for development and verification of classical linear and modern nonlinear excitation control algorithms. Real-time Clarke and Park transformations were implemented on the FPGA for measurements of the generator load angle, voltages...
This paper proposes a design methodology and design process for mechatronic systems incorporating the public community. As a proof of concept, we are building up robot system consisting of the following components: software code files, hardware design files and controller hardware. Every component will be available for review on an open repository and review tool which is GIT/Gerrit. Designers release...
The life-science and health care research environments offer an abundance of new opportunities for improvement of their efficiency and productivity using big data in collaborative research processes. A key component of this development is e-Science analytics, which is typically supported by Cloud computing nowadays. However, the state-of-the-art Cloud technology does not provide an appropriate support...
The solution of linear system of equations is one of the most common tasks in scientific computing. For a large dense systems that requires prohibitive number of operations of the order of magnitude n3, where n is the number of equations and also unknowns. We developed a novel numerical approach for finding an approximate solution of this problem based on Fourier or Hartley transform although any...
In the scientist's community one of the most vital challenges is the reproducibility of a workflow execution. The necessary parameters of the execution (we call them descriptors) can be external which depend on for example the computing infrastructure (grids, clusters and clouds), on third party resources or it can be internal which belong to the code of the workflow such as variables. Consequently,...
In the past two years the project “introduction and application of e-learning and e-services, e-schoolbag” aimed to equip schools with ICT infrastructure and tablet computers in Slovenia. The article presents the key advantages of using tablet computers in primary school physics teaching and learning. Tablets promoted the internet information source and changed the role of teacher who becomes more...
In this paper, the authors defined mathematical competences for the 7th grade of elementary school. The basic objective was to measure the mathematical competences or mathematical knowledge, skills and abilities in mathematical education. Mathematical competences were grouped in following areas: Algebra and functions, Space and shapes and Measurements and Data. Statistical set for the research consisted...
The exploration and analysis of large databases represents a subject of research efforts for several industries. In this paper the case of production of flat metals, where advanced optimization technologies based on mathematical modeling are integrated in the automation architecture together with databases, is discussed: in particular the use of MATLAB as an offline tool for model analysis and calibration...
Photovoltaic systems as part of larger distribution systems for the production of electricity have non-linear current-voltage characteristics. These characteristics depend on the temperature of the solar cells and insolation of panels. The method for the search of the maximum power or MPPT is widely known, and there are many offered algorithm solutions. The aim of this paper is to present ANFIS (Adaptive...
This paper focuses on a critical component of the situational awareness (SA), the motion control of autonomous vertical flight for vectored thrust aerial vehicle (VTAV). With the SA strategy, we proposed a two-rate flight control procedure using two autonomous control subsystems to address the dynamics variation and performance requirement difference in initial and final stages of flight trajectory...
In this paper, in order to tackle one of the dozens of the challenging optimization problems in aviation industry, we introduce an algorithm for planning the sequence of arrivals and departures of aircraft in a runway. The algorithm is based in Iterated Local Search (ILS) algorithm and uses two effective operators, namely swap and shift, for exploring the neighborhood of current running solution....
Discrete-event systems (DESs) are a wide range of models used primarily to deal with complex technological objects, e.g. communication networks and computer systems. To regulate DES behavior, Ramadge-Wonham supervisory control theory is often used. As usual, only a part of DES's event set is available for supervisor to obtain control pattern. However, sometimes information about the system state is...
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