The thesis deals with analysis of the PLC (Power Line Communication) system for data communications through powerlines. In the introduction describes the technology of data transmission through the energy network and is divided into categories corresponding with the explanation of the various specifications and features. Different types of coding, affecting the transmitted signal interference and modulation techniques used in a PLC are also described. The practical part is made up of telecommunications network model with transmission channel realized as additive white noise. The model can setup different types of modulation and coding in relate with the signal to noise ratio and bit error rates. The individual blocks settings are described in detail. The model was simulated. The results of simulation are displayed and evaluated at the end of work.

This master’s thesis deals with the design and optimization of the quadrotor stabilization control. The basic physical properties and technical aspects of this specific device are illustrated using the NANOKOPTER platform. Dedicated mathematical model of quadrotor was implemented in MATLAB/Simulink environment to emulate the behavior and characteristics of real quadrotor. Based on this model a feasible method of stabilization control by means of state controller was conceived and developed. The proposed solution utilizing state controller was incorporated into the stabilization control procedures of the NANOKOPTER testing platform and its functionality successfully verified during field trials.

Master’s thesis is dedicated to the issue of network element. In the first part are described technological aspects as the internal structure of network elements and control mechanisms that provide differentiaton of services and support their quality requirements. In the first chapter are listed control mechanisms from most simple like FIFO to the more sophisticated like CBWFQ. Active queue managements are not missing and they are described in the section Riadiaci člen. Significant role in the differentiation of services have processes marking and pakets classification. The second chapter is devoted most promising standard DiffServ. Contains section devoted to architecture, paket marking, code point DSCP and the final part is devoted to the types of per-hop behavior and it is expedited forwarding EF and technique assured forwarding AF. The third chapter gives an overview common models of neural networks, their properties and assess their suitability for deployment in network elements. The routher design itself and its structure in programming environment Matlab/Simulink is the subject of the fourth chapter. Except used bloks from Simulink library is described their setting and function in the wiring. Consequently results are reviewied and conclusions drawn.

The aim of this work is to create complex virtual model of electromagnetic vibration generator. This model will include mechanical and electromagnetic subsystem and also the model of output circuit. Created model will be implemented in Matlab/Simulink enviroment and model parameters will be identified so that the compare of simulation and real results will be acceptable.

Indiana University-Purdue University Indianapolis (IUPUI) / A SIMULINK simulation is presented for an air-gapless motor in this thesis. By considering magnetic saturation effect, four materials are compared and discussed in Chapter three.

No description available.

Aircraft modeling and simulation have become increasingly important in the areas of pilot training, safety and aircraft design, especially for unmanned aerial vehicles (UAVs). A userriendly, easily expandable, nonlinear six degree-ofreedom aircraft simulator for the Xipiter X-2C Xawk UAV was created to address these issues. The simulator will allow pilots to have an opportunity to train and gain experience in flying the aircraft even before it leaves the ground. In addition, it will allow for design modifications or new aircraft designs to be evaluated before time and money are spent on their implementation. This work can also serve as the basis for the development of control systems for the aircraft, such as a control augmentation system or autopilot.

With the increased requirements for personal portable power systems to be more capable and better matched to the load and the mission, manufacturers have become interested in improved methods for predicting the performance of these systems. Personal portable power systems must meet challenging energy and portability requirements that require better predictive knowledge of these systems in integrated systems with realistic mission scenarios. This thesis presents the development of a modeling and simulation environment to further expand and predict the needs and requirements of personal portable power systems. The proposed personal portable power system is a diverse system consisting of energy and power sources, controllers, a DC-DC converter, batteries, and loads. An outcome of this initial simulation environment development is a tool that can be used in future work to plan scenarios and tasks.

This thesis describes an improved methodology for embedded software development. MATLAB and Simulink allow engineers to simplify algorithm development and avoid duplication of effort in deploying these algorithms to the end hardware. Special new hardware targeting capabilities of MATLAB and Simulink are described in detail. A motor control system design served to demonstrate the efficacy of this new method. Initial data was collected to help model the motor in Simulink. This allowed for the design of the open and closed loop control systems. The designed system was very effective, with good response and no steady state error. The entire design process and deployment to a digital signal processor took significantly less time and effort than other typical methods. The results of the control system design as well as the details of these development improvements are described.

Dagens samhälle står inför många utmaningar där energieffektivisering är en stor del för att nå Sveriges energipolitiska mål. Det finns anledning att effektivisera och optimera energianvändningen i Sveriges papper- och massaindustrier då de står för en stor andel av nationell energiförbrukning. Papper- och massatillverkning genererar processavloppsvatten som kräver rening då det innehåller en hög halt organiska ämnen som kan orsaka miljöproblem vid utsläpp till närliggande recipient. För att resurs- och miljöeffektivisera krävs god förståelse och kunskap kring hur den aktuella reningsprocessen ser ut och vilka påverkansfaktorer som spelar störst roll då de varierar från bruk till bruk.  I det här examensarbetet undersöks möjligheten att effektivisera en biologisk reningsprocess på Stora Enso Skoghalls bruk med hänsyn till elanvändning för luftning och tillsättning av närsalter. På grund av en ny installering av luftningsteknik så har bruket förbättrat förutsättningarna för syresättning och har efter detta ett ökat överskott på syre i deras luftade damm. Installationen öppnade för att kunna reglera lufttillförseln och även en möjlighet att studera närsaltsdoseringen då dessa faktorer har stor påverkan på funktionen av det biologiska reningsverket.  En beräkningsmodell över reningsprocessen formades efter processdata från bruket med målsättning att göra en modell som stämde väl överens med verkligheten. Olika scenarion har därefter studerats för att jämföra vilka åtgärder som har störst inverkan på miljöpåverkan, driftkostnad och energianvändning. Förändring av antalet ytluftare i drift efter syrebehov i den luftade dammen genomfördes som ett scenario. Minskning av slamålder undersöktes med hänsyn till luftning och närsaltsbehov i den luftade dammen. Även en sänkning av syrenivån i MBBR:en (biofilmreaktor med rörlig bädd) undersöktes samt installation av den nya luftningstekniken Hyperclassic i halva volymen av den luftade dammen, dels i kombination, dels som separata scenarion. En möjlighet till bypass runt MBBR undersöktes där olika andelar av flödet fick passera direkt till den luftade dammen. Med hänsyn till tidigare genomförd närsaltsdosering på bruket när det tillsättes enbart under vinterhalvåret så undersöktes nu möjligheten att säsongsanpassa tillsättningen av urea och fosforsyra. Dessa nio scenarion har jämförts mot referensfallet som är dagens drift av den biologiska reningen.  Målen med studien var att utforma en verklighetsanpassad beräkningsmodell för att identifiera möjliga förändringar i den biologiska reningen som resulterar i ett energieffektivt och miljömässigt bättre driftförslag.  Resultaten visar att det mest energi- och kostnadseffektiva scenariot var en kombination av åtgärder som sänkning av syrehalten i MBBR:en från 3 mg l-1 till 2 mg l-1 och användning av Hyperclassic i större delen av den luftade dammen. Det gav en kostnadsminskning på 48,5% och en minskning av energianvändning på ca 60% från referensfallet utan att påverka reningens effektivitet.  Störst påverkan på miljön har användningen av urea och fosforsyra vilket resulterade i att en minskning av närsaltsdosering på sommarhalvåret gav en stor minskning på miljöpåverkan. Det finns en möjlighet att reducera klimatpåverkan med omkring 100 ton CO2-ekv. år-1 i global uppvärmningspotential och omkring 140 kg PO43—ekv. år-1 i övergödningspotential. Det övergripande målet att utforma en verklighetsanpassad beräkningsmodell över reningsverket uppfylldes. Slutsatsen är också att till synes små förändringar, som att sänka syrehalt i MBBR och tillämpa en mer optimal dosering av närsalter, har betydande inverkan på energianvändning, driftkostnad och miljöpåverkan. / To achieve the goals set by Sweden’s energy policy, improving the efficiency of energy use in society and economy is an imperative. Sweden’s paper and pulp sector accounts for a significant proportion of national energy usage. Paper and pulp production generates wastewater from the production process that requires purification as it has a high content of organic substances that can cause environmental problems when released to nearby sinks. In order to improve resource and environmental efficiency, a good understanding and knowledge of the effectiveness of the current purification process, and the main environmental impact categories (which vary from mill to mill), is required. In this degree project, the possibility of optimizing a biological purification process at the Stora Enso Skoghall mill, with respect to electricity usage and the addition of nutrients, has been investigated. By installing a new aeration technology, the mill has facilitated an increase in the level of oxygen in its aerated lagoon. The installation made it possible to regulate the air supply and provided an opportunity to study the dosing of nutrients – two factors that have a major impact on the functioning of the biological treatment plant. A computational model of the purification process was developed, based on process data obtained from the mill. The aim was to build a model that synchronized well with reality. Different scenarios were compared on the basis of environmental impacts, energy use and operational expenses. The number of surface aerators was changed according to oxygen demand in the aerated pond, in one scenario. The consequence of the reduction of the Sludge Retention Time (SRT) on aeration and nutrient salt requirements in the aerated lagoon, was investigated. The effects of lowering the oxygen level in the MBBR (Moving Bed Biofilm Reactor), and the installation of the new Hyperclassic aeration technology in half the volume of the aerated lagoon, were studied – both in combination and as discrete scenarios. The possibility of bypassing the MBBR and directing different proportions of flows directly to the aerated lagoon was explored. Taking into account the previously implemented nutrient salt dosing at the mill (added only during the winter months), the possibility of seasonally adjusting the dosing of urea and phosphoric acid was investigated. These nine scenarios were compared with the reference case, which is the status quo of the biological treatment at the mill. The goal of the study was primarily to design a realistic calculation model to identify possible changes in the biological treatment that will lead to an energy-efficient and environmentally-friendlier alternative. The results depicted that the most energy-efficient and cost-effective alternative was a combination of measures such as lowering the oxygen level in the MBBR from 3 mg l-1 to 2 mg l-1 and using Hyperclassic in the aerated lagoon. This arrangement generated a 48.5% reduction in operational expenses, and a 60% decrease in the energy use, vis-à-vis the reference case, without affecting the efficiency of the purification process. The reduction in the use of nutrient salts, urea and phosphoric acid, in the summer months, truncated the environmental footprint significantly. An opportunity to mitigate the global warming impact and the eutrophication potential, by approximately 100 tons of CO2-eq. year-1 and 140 kg PO43-eq. year-1 was revealed in this study. The overall goal of designing a realistic computational model for the treatment plant was achieved. The conclusion is also that seemingly small changes, such as lowering the oxygen level in the MBBR, and applying a more optimal dosage of nutrient salts, can significantly decrease the energy use, reduce operational expenses and mitigate the environmental impact.