|
|
Frame of stationary hydraulic device
Klezla, Vojtěch ; Pokorný, Jan (referee) ; Pokorný, Přemysl (advisor)
The subject of this thesis is design and strength analysis of stationary hydraulic device. Strength analysis is made by the finite element method. The thesis describes design of used frames, profiles and other components, which are parts of the frame. Frame modification is proposed, based on the results of the strength analysis. These modifications are checked with strength analysis. The thesis includes drawing of weldment. The project has been carried out in cooperation with Bosch Rexroth, spol. s. r. o.
|
|
|
Tracked chassis of a forwarder
Svoboda, Jan ; Pokorný, Jan (referee) ; Kašpárek, Jaroslav (advisor)
The thesis describes the design of a modular track undercarriage system for a forest utility vehicle called the forest forwarder. In the introduction there is a research study which reviews a variety of design options. The main part of the thesis describes the 3D model created in the Catia V5 programme. The model was subjected to an analysis of dynamic effects by simulated use of the track undercarriage system in the MSC Adams programme. A selected part of the undercarriage was analyzed by the finite element method in the Ansys Workbench programme. Drawing documentation of some of the components is included at the end of the thesis.
|
|
|
Variation of the Evolutionary Algorithm for Dynamic Problems
Pokorný, Jan ; Bidlo, Michal (referee) ; Schwarz, Josef (advisor)
This study is focused on SOMA evolution algorithm and testing its versions aimed to solve dynamic problems. At the beginning it briefly explains principes of evolution algorithms and then it looks closer on SOMA algorithm. It describes its contemporary troubles for static and dynamic problems. There are also mentioned ways for their correction. It also describes the mostly used strategies -- All To One, All To Random, All To All and All To All Adaptive and shows their advantages and disadvantages. Furthermore another searching strategy is proposed focused on dynamic functions that are changing independently on program. The separate chapter is about project part of the study. There is described implementation and merging of used programs. This part is available on included CD along with results of testing strategies. Tables with average values are also part of the thesis.
|
|
|
Symbian S60
Pokorný, Jan ; Weiss, Petr (referee) ; Chmelař, Petr (advisor)
Symbian OS with its additions (consisting of a user interface and an application suite) forms a software base for so-called smartphones. S60 platform that is the aim of this thesis is one such example. Although a significant part is dedicated to a theoretical overview covering Symbian and S60, the main goal is to develop a sample application. It enables customizable notifications for incoming short text messages (SMS) according to various criteria. It has been implemented in (Symbian-specific) C++ with the use of C++ orientated development environment (IDE) Carbide.c++ 2.0 and standard development kit (SDK) for S60 3rd Edition (initial release and Feature Pack 1). This application serves as an example to demonstrate some characteristics of the development for this platform as well as the means of an access to the relevant sorts of data and performing the relevant operations.
|
|
|
Algorithms for Movement Control of Bipedal Robot
Pokorný, Jan ; Janoušek, Vladimír (referee) ; Martinek, David (advisor)
This thesis is focused on using softcomputing method for learning bipedal robot to walk. Robot is represented by virtual model. At the beginning are the motivation and reasons for processing this theme. Next is devised shape of the robot which will be used. Then are selected libraries used by simulation. Further is devised system of robot learning algorithms. The most important of them is SOMA which is therefore described more. Due to assumed computational complexity is part of thesis focused on optimalization and simplification. One chapter focuses on measurement of quality of solution approximation. At the end there is an evaluation of thesis results.
|
|
|
Creation of Sparse Adapter for the Code Listener Infrastructure
Pokorný, Jan ; Peringer, Petr (referee) ; Dudka, Kamil (advisor)
Program checking is indisputably important, especially if originating in formal methods. VeriFIT at FIT BUT uses custom Code Listener (CL) infrastructure modularly interconnecting the front-end, typically a code parser adapter, and the back-end, typically an analyser. Our aim is to offer a former as a compact alternative to existing GCC compiler plug-in. This adapter uses linearized code mediated by sparse library for static analysis of programs in C. According to the experiments with one of the main CL analysers, Predator tool and its tests suite, our product - clsp program - is successful successful in roughly 75% of cases in comparison with the GCC plug-in. Further improvements are expected.
|
|
|
Coupling of the Models of Human Physiology and Thermal Comfort
Pokorný, Jan ; Jícha, Miroslav (advisor)
The thesis deals with car cabin environment and thermal comfort inside. A car cabin heat load model was developed in Dymola/Modelica to investigate influence of ambient environmental parameters. The model was validated on the data set of eight test cases measured in a climatic chamber and in a real traffic. The main objective of the thesis was to develop a human thermal comfort model suitable for non-homogenous environments and for a car cabin environment especially. The Coupled model of human physiology and thermal comfort was developed in Dymola/Modelica. The model allows predicting an overall human thermal comfort from local boundary conditions representing ambient and personal factors. The model was validated by 16 test cases taken from experiments in literature. Moreover three test cases were created in Theseus-FE to consider an asymmetrical heat load from Sun rays inside a car cabin. Prediction of the Coupled model was compared with Fiala model and experimental data. The Coupled model predicted mean skin temperature for moderate activities in neutral and warm environment well. In cold environment a predicted core temperature was very affected by ambient temperature and during high activity exercises, the predicted mean skin temperature was too high.
|
|
|
Coupling of the Models of Human Physiology and Thermal Comfort
Pokorný, Jan ; Masaryk, Michal (referee) ; Kratochvíl, Zdeněk (referee) ; Jícha, Miroslav (advisor)
The thesis deals with car cabin environment and thermal comfort inside. A car cabin heat load model was developed in Dymola/Modelica to investigate influence of ambient environmental parameters. The model was validated on the data set of eight test cases measured in a climatic chamber and in a real traffic. The main objective of the thesis was to develop a human thermal comfort model suitable for non-homogenous environments and for a car cabin environment especially. The Coupled model of human physiology and thermal comfort was developed in Dymola/Modelica. The model allows predicting an overall human thermal comfort from local boundary conditions representing ambient and personal factors. The model was validated by 16 test cases taken from experiments in literature. Moreover three test cases were created in Theseus-FE to consider an asymmetrical heat load from Sun rays inside a car cabin. Prediction of the Coupled model was compared with Fiala model and experimental data. The Coupled model predicted mean skin temperature for moderate activities in neutral and warm environment well. In cold environment a predicted core temperature was very affected by ambient temperature and during high activity exercises, the predicted mean skin temperature was too high.
|
|
|
Interaction between Mobile Working Machines and Rolled Surfaces
Pokorný, Jan ; Hrabovský, Leopold (referee) ; Červinka, Jan (referee) ; Škopán, Miroslav (advisor)
This dissertation thesis is concerning with an interaction between mobile working machines and rolled surfaces. Machines and their constructions parts behavior were observed. There are some machines that can change state of surface. And due to these change of surface the machine is in different conditions for drive and also for works. The interaction of working machines and rolled surfaces was categorized in this work and for each category here is a methodic work flow for solution of various cases. Three examples are described in this work. Some simulating programs were used for all cases and therefore there is a methodic work flow for creating and simulating of models. Three described examples include a complex solution of hydraulic drive for vibration exciter of vibration roller, small cleaner of canalizations with aim on load case to frame of this cart. The third example describes solution of undercarriage frames of agricultural semi-trailers. This example is the most extensive chapter from this work due to including of marketing research at the beginning of development and also verification of simulated results with results from real prototype tests at the end of development of these undercarriage frames.
|
|
| |
guest ::
RSS feed.