Control system development for hydraulics manipulator

Tato diplomová práce se zabývá realizací řídicího systému pro hydraulický manipulátor. Je rozdělena do tří hlavních částí. První část je věnována senzorům a aktuátorům, které jsou použity na hydraulickém manipulátoru. Další část popisuje návrh, výrobu a programování elektronického řídicího sub-systému. V poslední části je popsán nadřazený řídicí software vytvořený v prostředí LabVIEW.This diploma thesis concernes with the realization of a control system for hydraulic manipulator. It is devided into three main parts. The first part concerns sensors and actuators, which are used at the hydraulic manipulator. The second part describes design, production and programming of electronic control sub-system. The last part describes high level control software, created in the LabVIEW environment.

Sintering ability of feldspars and their alternatives

Cílem této bakalářské práce je porovnat slinovací aktivitu živců, které jsou nejčastěji používané tavivo v keramice, s jejich alternativami jako jsou lomové odprašky a kostní popel. Teoretická část popisuje proces slinování, slinovací aktivitu jednotlivých druhů používaných taviv a jejich využití při výrobě keramiky. Praktickou část tvoří popis a vyhodnocení pokusu, ve kterém jsou porovnávány slinovací aktivity jednotlivých taviv v keramickém střepu v závislosti na jejich procentuálním zastoupením v surovinové směsi.The main goal of this Bachelor’s thesis is to compare sintering ability of feldspars which are the most used flux in ceramics with their alternatives such as quarry dust and bone ash. Theoretic part describes process of sintering, sintering activities of used fluxes and their use in the manufacture of ceramics. Practical part is dedicated to description and evaluation of experiment in witch sintering activities of various fluxes ceramic product are compared in dependence on their percent proportion in raw material mix.

Potential of biomass resources in CZE and costs of its energy utilisation - I

Cílem bakalářské práce ,,Potenciál biomasy v ČR a náklady na její energetické využití,, je zhodnotit finanční stránku energetického využití biomasy a shrnout faktory, které ovlivňují cenu biomasy na trhu České repuliky. Práce se zaměřuje na dřevní štěpku. V úvodu se práce zabývá základním rozdělením biomasy a jejím energetickým využitím. Další kapitola je věnována dřevní štěpce a její výrobě a vlastnostem. Druhá část práce se věnuje výskytu dřevařských podniků v ČR a zhodnocení ceny štěpky.This bachelor thesis ,,Potential of biomass resources in CZE and costs of its energy utilization,, evaluates financial part of energetic use of biomass and summarizes factors affecting the price of biomass on Czech market. The work is focused on wood chips. In the introduction there is an overview of basic division of biomass and utilization as an energy source. Next chapter is about wood chips, their production and properties. Second part of the thesis describes the occurrence of lumber companies in Czech Republic and assessment of wood chips price.

Development of Platform for Three-Rotor Helicopter

Cílem této práce je návrh a stavba platformy pro vývoj třírotorové helikoptéry, nazývané tricopter. Teoretická část práce vysvětluje principy letu helikoptér a způsob ovládání tricopteru. Popisuje činnost inerciálního navigačního systému a jednotlivých senzorů. Seznamuje čtenáře s použitými řídící a měřící prvky. Praktická část se zabývá návrhem vhodné konstrukce tricopteru, která byla pro účely této práce postavena. Je uveden návrh hardwarové části řídícího systému. Popisuje vzájemnou komunikaci dílčích subsystémů, dekódování řídících signálů a PID regulátor, který zajišťuje stabilizaci letu.The goal of this master's thesis is design and built of platform for three-rotor helicopter development. The helicopter is also known as tricopter. Theoretical part describes principle of tricopter's flight and stabilization. There is also described basics inertial navigation system and sensors which are required for correct functionality. Practical part is dedicated to development of tricopter's frame, schematics diagram, communication between subsystems and stabilization system development. Flight stablization system is base on ATmega128A an using PID Controller. In the end is described testing of developed platform.

Design of unicast and multicast models in NS2

Prce je zamÄena na tvorbu s­t­ pomoc­ nstroje Network Simultor 2. Hlavn­m t©matem prce je simulace unicastov©ho a multicastov©ho smÄrovn­.Prce tak© popisuje protokoly pou­van© na transportn­ vrstvÄ, jako je protokol TCP (Transmission Control Protocol) a UDP (User Datagram Protocol). V neposledn­ adÄ prce obsahuje laboratorn­ lohy, v nich si Äten me ovÄit nabit© znalosti simulovn­ Unicastu a Multicastu.This work is focused on Network Simulator 2 - tool used for simulating network implementations. Focal point of this work is simulating of unicast and multicast routing. This work also describes protocols used on transport layer, such TCP (Transmission Control Protocol) and UDP (User Datagram Protocol). Last but not least work includes laboratory part in which reader is able to verify reached knowledge in Unicast and Multicast simulation.

The Role of Obesity and Dietary Fatty Acid Content in Regulating Humeral Bone and Cartilage Homeostasis

Objective: The goal of this study was to investigate the effects of different dietary fatty acids in the context of diet-induced obesity on bone and cartilage in the humerus. It is known that obesity increases the severity of injury-induced osteoarthritis in the knee, however it is not fully understood what pathological changes have occurred due to diet alone1. Additionally, while it is known that shoulder osteoarthritis has a link to obesity, the alterations in this joint are incompletely described. Methods: In order to examine diet-induced changes in both bone and cartilage, this research utilized mice that had been previously fed diets high in saturated fat (SF), omega-6 fatty polyunsaturated fatty acids (ω-6 PUFA) or omega-3 polyunsaturated fatty acids (ω-3 PUFA) for an earlier study1. Humeral heads were obtained for testing. Analysis for bone morphometry, bone mineral density, cartilage micro-scale mechanical properties using atomic force microscopy, and histological grading was performed. Results: Differences in bone morphology and mineral density were seen between diet groups. The high-fat diets in general showed decreased bone quality with the ω-3 PUFA diet being partially protected. Micro-scale cartilage stiffness and overall modified Mankin scores showed no diet-dependence. Discussion: This study showed that specific types of fatty acids differentially alter bone morphology and mineral density, with no observable changes in the articular cartilage. These findings suggest that in the shoulder, diet-induced obesity by itself may not be a risk factor for osteoarthritis, but may result in other musculoskeletal changes

CORROSION RESISTANCE OF WATER-THINNABLE PAINT SYSTEMS

Anticorrosion protection on the basis of water-thinnable paint systems belongs among one of ecological ways of protection of metal parts. The aim of the experiment was to test corrosion resistance of water-thinnable systems Eternal antikor speciál V9503 and Colorlak aquarex V2115 in the salt spray environment according to the norm ČSN ISO 9227. Ductility of used paint systems in complience with the norm ČSN EN ISO 1520 will be also tested, it is a test according to Erichsen. At the end of the experiment measurement, the corrosion speed depending on paint coating thickness was analyzed

A Network Simulation Tool for Task Scheduling

Distributed computing may be looked at from many points of view. Task scheduling is the viewpoint, where a distributed application can be described as a Directed Acyclic Graph and every node of the graph is executed independently. There are, however, data dependencies and the nodes have to be executed in a specified order. Hence the parallelism of the execution is limited. The scheduling problem is difficult and therefore heuristics are used. However, many inaccuracies are caused by the model used for the system, in which the heuristics are being tested. In this paper we present a tool for simulating the execution of the distributed application on a “real” computer network, and try to tell how the executionis influenced compared to the model