National Repository of Grey Literature 292 records found  beginprevious283 - 292  jump to record: Search took 0.01 seconds. 
Walking as alternative source of electrical energy
Smilek, Jan ; Hejč, Tomáš (referee) ; Hadaš, Zdeněk (advisor)
This thesis deals with problematics of using the Energy Harvesting principles for generating power from the human walking. Own acceleration measurement during walking was made on various locations of human body to provide data for self-developed MATLAB/Simulink energy balance script. The script clearly sets the possibilities and limits of vibration generator used in this application. Conclusions of the energy balance were used to specify requirements for development of vibration generator and few possible conceptions, working on frequencies close to 2 Hz and acceleration amplitudes 0,3 g, were presented, or simulated.
Green Machine Tools
Harapát, Jan ; Blecha, Petr (referee) ; Hadaš, Zdeněk (advisor)
This work is aimed at energy analysis and the search for the posibility of energy saving in present machine tools. There is mentioned the basic division of machine tools, it describes and analyzes the various methods of energy harvesting systems, and looking for the ways to improve the performance of machine tools.
Modelling of Dynamic Tasks in SolidWorks Motion
Podzemný, Zdeněk ; Donát, Martin (referee) ; Hadaš, Zdeněk (advisor)
Aim of this thesis is creation 3D models of dynamic tasks (which were solved in subject Dynamics) in SolidWorks software and simulation in Motion module, which is part of SolidWorks Professional. Models can be used as a tutorial or educational help in Dynamics. The thesis is begun by description of Motion module and it's functions, then analytical methods of solving dynamic tasks are examined and after that is made a description of simulation in particular tasks together with simulation results. Almost every task is analytically solved and results are compared with simulation. In the conclusion of this thesis are discussed all results and simulations.
Modelling of vibration of dynamic systems with n-degrees of freedom
Horák, Petr ; Hadaš, Zdeněk (referee) ; Dušek, Daniel (advisor)
The aim of this work is to assemble mathematical model for given system of point masses. Compute the natural frequencies and their corresponding modes of vibration. Differentiations of vibration by various points of view are written in this work. The given system is analyzed and the equations of motion using two most common methods are written. Calculation procedure of mentioned physical quantities is written in order from simplified to complete system of point masses. This procedure is used in command file to express values numerical. The frequency response of the system and the displacement-time plots are shown. The impact of constant variability entering the calculation is described.
Modelling of vibration of dynamic systems with n-degrees of freedom
Luky, Robin ; Hadaš, Zdeněk (referee) ; Dušek, Daniel (advisor)
This Bachelor’s thesis deals with vibration of dynamic systems with luminous parameters with n-degrees of freedom. It features decision procedures of free-running undamped systems, exciting undamped systems, exciting damped systems and their natural shapes, natural frequency and gain-frequency characteristic. At the end of this Bachelor thesis there is an analysis of dynamic damper. The analysis is conducted in agreement with the theoretical procedures listed above.
Modelling and control design of mechatronics systems on state-space
Ertl, Lukáš ; Hadaš, Zdeněk (referee) ; Houška, Pavel (advisor)
This work is concerned with modeling of simple mechatronic’s systems in state space and with designing their controls. In work is described a method for constructing the state model of direct current motor with programs MATLAB/SIMULINK and NI LabVIEW. There is designed the control for realized model and this control is verified in simulation. Later are model and its control, verified on real system.
Redesign of Vibration Power Generator with Respect to Overall Volume and Weight
Vaněček, Michal ; Dušek, Daniel (referee) ; Hadaš, Zdeněk (advisor)
This work deals with improvement construction already of the vibration power generator design. The improvement his feature and search ideal construction with reference to material, proportions and power. Gain here mechanical properties, to come to what best tune up and development of new construction for improved check out characteristics as is achievement. Tuning up of correct parameters proceed by the simulation and modelling in ANSYS and MATLAB environment.
Design of Electromagnetic Part of Vibration Power Generator for Low Frequency
Konrád, Libor ; Březina, Lukáš (referee) ; Hadaš, Zdeněk (advisor)
The project deals with contemporary position of vibratory generators based on electromagnetic principle and optimal constructional solving of electromagnetic part of generator. Practical part is searching for suitable solving of construction of electromagnetic part of vibratory generator in the light of required power. Solving is brought to effect by the simulator simulation. Vibratory generator works in frequency range 17Hz. Final suggestion has to answer requirements of observance of frequency ranges, minimal power and simple production. Project includes simulation model as well as proposal of final form of modified generator.
Flood control measures in the Loučka Catchment
Hadaš, Zdeněk ; Marton, Daniel (referee) ; Starý, Miloš (advisor)
This thesis deals with the river basin flood protection Loučka. The aim to assess the need tu supplement flood control measures in the watershed. The first half deals with exploration of river basin, providing geographic factors and obtaining information on the topic. The second part deals with the establishment and application of rainfall model to solve the problem. For schematisation basin was used ArcGIS program. Rainfall simulation process were calculated critical duration of rainfall intensity and spare set of N-year flows. It was by searching for critical points and assessed for possible overflow.
Analýza možnosti ovlivnění reprodukčních a produkčních ukazatelů prasniček konjugovanou kyselinou linolovou
Hadaš, Zdeněk
The disertation analyses the possibility of influencing reproduction and production paramatres of gilts and sows with the addition of 2 % conjugated linoleic acid in feed mixtures in operating conditions of a production pig farm. The evaluation of mean achieved daily growth for the time from birth to the end of the test confirmed higher values for gilts in the experimental group. Within other parametres of efficiency of gilts, ie. the lean meat rate, backfat thickness and the depth of MLLT muscle, no significant influence of CLA on their phenotypic manifestation was found. On the basis of gained results it can be concluded, that the supplementation of CLA decreases the mean age of gilts at the time of their first serving. At the same time, the age of first farrowing was lower in the experimental group. Evaluation of reproductive performance parametres revealed a tendency of reaching better results in the experimental group, however without statistically significant differences. In the another part of this study, the sows of the experimental group had provably longer gravidity, the birth weight of piglets was not affected. Results of the experiment show significantly higher number of reared piglets in the experimental group of sows and related level of piglet losses from birth to weaning. Growth ability of piglets from birth to weaning do not show any significant effect. The aim was also to evaluate whether CLA administered to sows during lactation influences an inclusion to next reproductive cycle. Shorter interval of estrus onset was found in the group of sows with compound feed enriched with conjugated linoleic acid. Although the results of conception of sows after weaning pigltes speaks in favour of the experimental group, no significant difference was proved.

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