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Wyniki wyszukiwania dla: RAIL TRANSPORT, GLOBAL NAVIGATION SATELLITE SYSTEM (GNSS), SATELLITE RECEIVER, EUROPEAN TRAIN CONTROL SYSTEM (ETCS), TRAIN POSITIONING SYSTEM, POLISH STATE RAILWAYS (PKP)
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Naval mine detection system based of FPGA circuit
PublikacjaElectrochemical processes take place in a metal object immersed into sea water even if an anticorrosive coating is applied [1]. As a result, flowing field appears around the object. There are naval mines between many other objects situated in the sea. Naval mines can be put in the seabed in order to be more difficult to detect by sonars. Such a mine is located on the line demarking two environments of different electrical conductivity....
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Efficiency of the Education System (Primary, Secondary and Tertiary) in Particular Voivodeships of Poland
PublikacjaThe reform of the Polish education system (both lower and higher education) that was carried out in recent years has shown the need to improve the efficiency of schools. Therefore, it is reasonable to analyse and evaluate the efficiency of educational centres...
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Collecting and classification web data for business using a web farming system
PublikacjaPraca prezentuje system typu Web Farming oraz aspekty związane z jego działaniem.
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MAPSERVER – INFORMATION FLOW MANAGEMENT SOFTWARE FOR THE BORDER GUARD DISTRIBUTED DATA EXCHANGE SYSTEM
PublikacjaIn this paper the architecture of the software designed for management of position and identification data of floating and flying objects in Maritime areas controlled by Polish Border Guard is presented. The software was designed for managing information stored in a distributed system with two variants of the software, one for a mobile device installed on a vessel, an airplane or a car and second for a central server. The details...
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Time domain model of the resonance-based electromagnetic pulses emission system
PublikacjaIn the literature, the emission properties of the electromagnetic field pulse systems based on high voltage antennas (HVR) have been widely described. In order to increase the emission efficiency by extending duration and increasing amplitude of the impulse it is possible to use a resonance system tuned to the parameters of the signal shaped in the pulse forming circuit. The synthesis of a time-domain simulation model of a complex...
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System wymuszonego dawkowania zawiesiny ściernej w docieraniu powierzchni płaskich
PublikacjaPrzedstawiono innowacyjny system dawkowania zawiesiny ściernej. System ten umożliwia sterowanie procesem dawkowania i nanoszenia zawiesiny na powierzchnię docieraka tarczowego. Układ składa się z wysokociśnieniowego zbiornika wyposażonego w mieszadło o napędzie pneumatycznym, które zapewnia ciągłe mieszanie zawiesiny ściernej. W skład układu wchodzi również urządzenie nanoszące komponent na docierak i elektroniczny układ sterowania...
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Analysis of Failures of High Speed Shaft Bearing System in a Wind Turbine
PublikacjaDuring the operation of wind turbines with gearbox of traditional configuration, consisting of one planetary stage and two helical stages high failure rate of high speed shaft bearings is observed. Such a high failures frequency is not reflected in the results of standard calculations of bearing durability. Most probably it can be attributed to atypical failure mechanism. The authors studied problems in 1.5 MW wind turbines of...
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A Wind Energy Conversion System Based on a Generator with Modulated Magnetic Flux
PublikacjaIn this work, the concept of an energy conversion system for wind turbines based on the modified permanent magnet synchronous generator (PMSG) is presented. In the generator, a pair of three-phase windings is used, one of which is connected in a “star” and the second in a “delta” configuration. At the outputs of both windings, two six-pulse uncontrolled (diode) rectifiers are included. These rectifiers are mutually coupled by a...
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Person Tracking in Ultra-Wide Band Hybrid Localization System Using Reduced Number of Reference Nodes
PublikacjaIn this article a novel method of positional data integration in an indoor hybrid localization system combining inertial navigation with radio distance measurements is presented. A point of interest is the situation when the positional data and the radio distance measurements are obtained from less than thee reference nodes and it is impossible to unambiguously localize the moving person due to undetermined set of positional equations....
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Evolving neural network as a decision support system — Controller for a game of “2048” case study
PublikacjaThe paper proposes an approach to designing the neuro-genetic self-learning decision support system. The system is based on neural networks being adaptively learned by evolutionary mechanism, forming an evolved neural network. Presented learning algorithm enables for a selection of the neural network structure by establishing or removing of connections between the neurons, and then for a finding the beast suited values of the network...
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Application of case based reasoning to hybrid expert system for electronic filter design
PublikacjaPrzedstawiono koncepcję i przykład praktycznej realizacji obiektowo zorientowanego hybrydowego systemu ekspertowego wykorzystującego rozumowanie sytuacyjne. System wykorzystuje algorytmy najbliższego sąsiada i sztuczne sieci neuronowe. System został przetestowany jako klasyfikator decyzyjny w projektowaniu filtrów elektronicznych. W budowie systemu został wykorzystany obiektowy system CLIPS, rozszerzony o wiele dodatkowych funkcji...
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Selection of physiological parameters for optoelectronic system supporting behavioral therapy of autistic children
PublikacjaIn this article the procedure of selection of physiological parameters for optoelectronic system supporting behavioral therapy of autistic children is proposed. Authors designed and conducted an experiment in which a group of 30 health volunteers (16 females and 14 males) were examined. Under controlled conditions people were exposed to a stressful situation caused by the picture or sound (1kHz constant sound, which was gradually...
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FEM approach to estimate the behaviour of biocomposite metal-surface coating system
PublikacjaA three dimensional (3D) model of biocomposite metal-surface coating system, which is influenced byknown external forces, is proposed. This model consists of the metallic substrate (Ti6Al4V) and thehydroxyapatite (HA) coating. Using FEM (finite element method), strain-stress maps of model weregenerated for investigating relations between the extreme stress of HA coating and the magnitude ofexternal force and the thickness of the...
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Efektywny i przyjazny środowisku system napędowy małej jednostki rybackiej.
PublikacjaW pracy przedstawiono opracowany, wykonany i przebadany na Wydziale Oceanotechniki i Okrętownictwa Politechniki Gdańskiej efektywny i przyjazny środowisku system napędowy małej jednostki rybackiej. Ten prototypowy, nowoczesny system został zainstalowany na jednostce KR 10, która od września 2002 roku prowadzi połowy na Bałtyku. Do czasu złożenia referatu wszystkie informacje z eksploatacji kutra i jego systemu napędowego są...
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Formation of intermetallic compounds in the solid-liquid composites of the Ga-Ni system
PublikacjaThe processes of formation of intermetallic compounds in the composite system of liquid gallium-nickel powder by the methods of x-ray diffraction, scanning electron microscopy and differential thermal analysis have been studied. A change in the phase composition was discovered and the influence of thermal treatment of the composites under investigation on the phase formation processes was analyzed. The mechanism of gallium enriched...
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Evaluation of expanded uncertainty of instantaneous power measurement in a bearing diagnostic system.
PublikacjaThe paper presents the issues concerning the estimation of the expanded uncertainty in the system for the diagnosis of rolling bearings, consisting of transducers: voltage and current voltage, which is used for diagnostic bearing motors method based on the measurement and analysis of the instantaneous power signal consumed by the induction motor. It presents the methodology for assessing the measurement uncertainty and presents...
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System nawigacji bezkolizyjnej autonomicznego robota mobilnego SCORPION.
PublikacjaW artykule przedstawiono opracowany i wykonany system nawigacji autonomicznego robota mobilnego ERSP Scorpion umożliwiający realizację zadania unikania kolizji z przeszkodami statycznymi znajdującymi się w otoczeniu, w którym robota się porusza. Do akwizycji wiedzy o otoczeniu wykorzystano czujniki odometryczne oraz podczerwieni aktywnej. Przedstawiono również wyniki badań systemu nawigacji w różnych warunkach pracy, począwszy...
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Super capacitor energy bank MEDCOM UCER-01 in Gdynia trolleybus system
PublikacjaSince 2001, trolleybus system in Gdynia has been involved in many activities related to the reduction of power consumption, both in terms of implementation and research and development. The installation of the supercapacity energy bank on substation Wielkopolska in 2014 year was one of them. It is the first such big stationary supercapacitor storage system installed in trolleybus supply system in the Middle - Eastern Europe. The...
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The role of numerical tests in assessing road restraint system functionality
PublikacjaKey to understanding the needs and building road infrastructure management tools to prevent and mitigate run-off-road accidents is to identify hazards and their sources which are a result of wrong design, construction, and installation of road restraint systems. Building such tools requires advanced studies with field tests, simulations and models to demonstrate the effects of selected parameters on road user safety. The research...
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Decisional DNA based intelligent knowledge model for flexible manufacturing system
PublikacjaModeling an effective mechanism for design and control strategies for the implementation of a flexible manufacturing system (FMS) has been a challenge. Consequently, to overcome this issue various techniques have applied in the past but most of these models are effective only for some specific situation or an element of FMS. In this study, the knowledge representation technique of Decisional DNA (DDNA) is applied to FMS to develop...
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One-dimensional chaos in a system with dry friction: analytical approach
PublikacjaWe introduce a new analytical method, which allows to find chaotic regimes in non-smooth dynamical systems. A simple mechanical system consisting of a mass and a dry friction element is considered. The corresponding mathematical model is being studied. We show that the considered dynamical system is a skew product over a piecewise smooth mapping of a segment (the so-called base map). For this base map we demonstrate existence of...
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Pilot Testing of Developed Multimodal Biometric Identity Verification System
PublikacjaThe bank client identity verification system developed in the course of the IDENT project is presented. The total number of five biometric modalities including: dynamic signature proofing, voice recognition, face image verification, face contour extraction and hand blood vessels distribution comparison have been developed and studied. The experimental data were acquired employing multiple biometric sensors installed at engineered...
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Behavior Analysis and Dynamic Crowd Management in Video Surveillance System
PublikacjaA concept and practical implementation of a crowd management system which acquires input data by the set of monitoring cameras is presented. Two leading threads are considered. First concerns the crowd behavior analysis. Second thread focuses on detection of a hold-ups in the doorway. The optical flow combined with soft computing methods (neural network) is employed to evaluate the type of crowd behavior, and fuzzy logic aids detection...
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Robust Model Predictive Control for Autonomous Underwater Vehicle–Manipulator System with Fuzzy Compensator
PublikacjaThis paper proposes an improved Model Predictive Control (MPC) approach including a fuzzy compensator in order totrack desired trajectories of autonomous Underwater Vehicle Manipulator Systems (UVMS). The tracking performancecan be affected by robot dynamical model uncertainties and applied external disturbances. Nevertheless, the MPCas a known proficient nonlinear control approach should be improved by the...
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The Control System Based on FPGA Technology For Fatigue Test Stand MZGS-100 PL
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Simplified method of simulation of temperature field control system of induction heated calender rolls
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The Role of and the Place of Method Validation in the Quality Assurance and Quality Control (QA/QC) System
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Decision Support System to Improve the Effectiveness of Chemical Control Against Cutworms in Sugar Beet
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Networked Object Monitor - A distributed system for monitoring, diagnostics and control of complex industrial facilities
PublikacjaRozwój mobilności i technologii internetowych, a także globalizacji gospodarki światowej, uwzględniający kluczowe aspekty zarządzania przepływem informacji, otworzył zupełnie nowe możliwości opracowywania i konstruowania innowacyjnych rozwiązań technicznych. Z taką myślą powstał prototyp Sieciowego Monitora Obiektu, aplikacji umożliwiającej nie tylko ciągłą kontrolę parametrów obiektów przemysłowych i biznesowych, ale również zarządzanie...
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Intelligent control of integrated wastewater treatment system under full range of operating conditions.
PublikacjaW rozprawie przedstawiono struktury i algorytmy pozwalające na efektywne sterowanie łącznym usuwaniem azotu, fosforu i związków węgla w zintegrowanym systemie ściekowym, w szerokim zakresie jego obciążeń. Obiektem badań była oczyszczalnia ścieków w Kartuzach. Do sterowania tak złożonym i skomplikowanym systemem zaproponowano trójpoziomową i trójwarstwową, hierarchiczną strukturę sterowania. Poziomy sterowania (Nadzorujący, Optymalizacyjny,...
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Application of the CCHE1D model to the problem of flood control in Nysa Kłodzka reservoir system in Poland
PublikacjaW pracy przedstawiono wyniki zastosowania modelu CCHE1D do sterowania pracą zbiorników retencyjnych na Nysie Kłodzkiej w trakcie przejścia fali wezbraniowej wywołanej opadami deszczu na zlewni. Okazało się, że zastosowane do sterowania algorytmy optymalizacyjne są efektywne tylko w przypadku stosowania uproszczonych modeli transformacji fali wezbraniowej w rzece. Modele hydrodynamiczne, jak zastosowany model CCHE1D wydłużają proces...
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Neural network based control system architecture proposal for underwatership hull cleaning robot.
PublikacjaPrzedstawiono model matematyczny podwodnej głowicy roboczej, oraz określono metodę jej pozycjonowania i orientacji w lokalnym środowisku. Zaproponowano architekturę układu sterowania, opartego na bazie sieci neuronowych, za pomocą którego można sterować podwodnym robotem, przeznaczonym do czyszczenia burt statku.
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Comprehensive circumscribing of non-linearity cases of a water supply system with smooth flow control
PublikacjaW artykule opisano formalnie poprawne metody opisu matematycznego pracy pomp o płynnie regulowanych wydatkach oraz reduktorów ciśnienia i reduktorów przepływu w modelowaniu przepływów ustalonych zachodzących w systemach wodociągowych. Opisano metodę opartą o dynamiczną analizę wrażliwości systemu oraz metodę wykorzystującą charakterystyki hydrauliczne systemu wodociągowego. Przedstawiono wyniki symulacji wykorzystującej ww. metody...
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Robust Model Predictive Control for Autonomous Underwater Vehicle – Manipulator System with Fuzzy Compensator
PublikacjaThis paper proposes an improved Model Predictive Control (MPC) approach including a fuzzy compensator in order to track desired trajectories of autonomous Underwater Vehicle Manipulator Systems (UVMS). The tracking performance can be affected by robot dynamical model uncertainties and applied external disturbances. Nevertheless, the MPC as a known proficient nonlinear control approach should be improved by the uncertainty estimator...
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Sensorless control system of induction machine supplied by voltage source inverter with output filter
PublikacjaThe paper focuses on sensorless control of the induction machines supplied by inverter with the output filters. “The novel” idea of the speed observer which is based on the backstepping approach is shown. The standard structure of the exponential observer is extended by the integrators and additional Z vector. The simulation and experimental results validate the proposed solution.
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Laboratory bioreactor with pH control system for investigations of hydrogen production in the dark fermentation process
PublikacjaThe work presents the construction of a low-cost research bioreactor equipped with a pH control sys-tem. The developed bioreactor was applied for hydrogen production in the dark fermentation process using Enterobacter aerogenes ATCC 13048. Presented paper compares the results obtained during the process without and with pH regulation for different feed materials: glucose, energetic poplar hydro-lysates, acid whey and glycerol....
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Implementation of failover and load balancing algorithms in SIP PBX High Availability system
PublikacjaGoal of the project was to design a High Availability SIP VoIP system that guarantees access to additional services like auto-attendent and automatic call distribution. The realization of the project required system to have load balancing and failover algorithms implemented. From the end users’ point of view the whole system had to figure as a single element. After taking under consideration the known methods of implementations...
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Shaping New Generations of Managers and Consumers: CSR Implementation and Higher Education System in Poland
PublikacjaConsidering the Corporate Social Responsibility as a significant research and education topic for university staff, students, graduates and the whole society, has become a sign of our times. Universities and other education institutions, including the third sector, play an important role, incorporating CSR as a crosscutting issue, in particular into the curricula of future managers and graduate students, no matter the country we...
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Satellite Laser Ranging technique as a tool for the determination of the Schwarzschild, de Sitter and Lense-Thirring effects
PublikacjaSatellite Laser Ranging (SLR) is a modern technique used in various research areas and applications related to geodesy and geodynamics. It is commonly used for tasks such as establishing the International Terrestrial Reference Frame (ITRF), monitoring Earth Orientation Parameters (EOP), determining the geocenter, measuring fundamental physical constants, calibrating microwave tracking techniques, conducting time transfer experiments,...
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Dedykowany System Informacji Przestrzennej w kontekście ochrony infrastruktur krytycznych
PublikacjaNowe zaawansowane narzędzia Technologii Informacyjnych i Komunikacyjnych mogą stanowić bardzo użyteczną pomoc podczas przewidywania różnego rodzaju zagrożeń jak również minimalizacji związanego z nimi ryzyka. Artykuł prezentuje Sieciowy System Informacji Przestrzennej dla Szacowania i Wizualizacji Infrastruktur Krytycznych i ich Zagrożeń, stworzony dla Urzędu Miejskiego w Gdańsku przez Politechnikę Gdańską. System ten jest przeznaczony...
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An application of simulation model of fuel consumption in diagnostic system of wheeled tractors
PublikacjaAn application of computer controlled fuel injection systems in vehicle engines and growing demands concerning toxic substances emission and fuel consumption was a main reason for OBD (On Board Diagnosis) development. In spite of a great technological development, only some tractors are equipped in diagnostic systems. On board diagnostic is strongly connected with emission demands and does not concern other important vehicle functions. In...
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Advanced Lithium-Ion Battery Model for Power System Performance Analysis
PublikacjaThe paper describes a novel approach in battery storage system modelling. Different types of lithium-ion batteries exhibit differences in performance due to the battery anode and cathode materials being the determining factors in the storage system performance. Because of this, the influence of model parameters on the model accuracy can be different for different battery types. These models are used in battery management system...
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Metamaterial-Based Sub-Microwave Electromagnetic Field Energy Harvesting System
PublikacjaThis paper presents the comprehensive analysis of the sub-microwave, radio frequency band resonant metastructures’ electromagnetic properties with a particular emphasis on the possibility of their application in energy harvesting systems. Selected structures based on representative topologies of metamaterials have been implemented in the simulation environment. The models have been analyzed and their substitute average electromagnetic...
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Possible uses of crisis situation aiding system in virtual world simulation
PublikacjaMany of the real world crisis situations like spreading fire, hostile units attack, flood, and etc. are commonly used in computer games where a simulation of extensive virtual world is crucial. This paper presents some ideas for possible uses of existing crisis situation aiding system in such environments. Moreover, it shows how this kind of system can be taught during subsequent games with a large number of players. As an example...
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3D-Breast System for Determining the Volume of Tissue Needed for Breast Reconstruction
Publikacja3D imaging systems can be used to effectively determine breast volumes for surgical applications. This article presents methods for surface reconstruction and volume determination based on the point cloud created by 3D imaging. Such a system would be used to accurately estimate breast volume in patients classified for breast reconstruction surgery at plastic surgery centers. To develop such a system, various methods of determining...
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FPGA-Based System for Electromagnetic Interference Evaluation in Random Modulated DC/DC Converters
PublikacjaField-Programmable Gate Array (FPGA) provides the possibility to design new “electromagnetic compatibility (EMC) friendly” control techniques for power electronic converters. Such control techniques use pseudo-random modulators (RanM) to control the converter switches. However, some issues connected with the FPGA-based design of RanM, such as matching the range of fixed-point numbers, might be challenging. The modern programming...
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System monitorowania szybkości korozji instalacji wodnych - to jakość wody. Cz. II
PublikacjaW pracy opisano bezobsługowy system monitorowania korozji. W tym systemie pomiary szybkości korozji wykonywane są automatycznie przy pomocy odpowiednich cyfrowych kart pomiarowych a następnie poprzez bezprzewodowy system transmisji danych przesyłane na serwer http.Taki system został zainstalowany wspólnie przez Wydział Ochrony Środowiska UM Gdańsk i Katedrę Elektrochemii, Korozji i Inżynierii Materiałowej PG i monitoruje instalację...
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Computer-aided analysis of resonance risk in power system with Static Var Compensators
PublikacjaStatic Var Compensators operation in a power system may significantly improve voltage profiles in nodes and the reactive power balance, as well as ensure greater system stability in emergency conditions. However these devices may be a cause of a resonance in the system. The aim of this paper is to call attention to the need to include resonance phenomena in a compensator’s location evaluation process. The analysis performed in...
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Interior Point Method Evaluation for Reactive Power Flow Optimization in the Power System
PublikacjaThe paper verifies the performance of an interior point method in reactive power flow optimization in the power system. The study was conducted on a 28 node CIGRE system, using the interior point method optimization procedures implemented in Power Factory software.
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HYBRID ENERGY SYSTEM FOR A CLASSIC SHIP POWER PLANT
PublikacjaThe article presents a brief overview of hybrid energy systems used on ships. The area of their application is outlined. The benefits of using such systems are also indicated. Then, the classic ship power plant is defined. The most important part of the article is a proposal how to modify a classic engine room by using a hybrid energy system. The idea is: to accumulate a part of electricity in areas where it is allowed to burn...