National Repository of Grey Literature 23 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
Dynamics of a cantilever beam with piezoelectric sensor: Parameter identification
Cimrman, Robert ; Kolman, Radek ; Musil, Ladislav ; Kotek, Vojtěch ; Kylar, Jaromír
The piezoelectric materials are electroactive materials often applied for real-time sensing or structural health monitoring, both important research topics in dynamics. Mathematical models of such structures have to allow also for the external electrical circuits and contain several material parameters that need to be identified from experiments. We present a model of a simple experiment involving dynamics of a cantilever beam with an attached piezoelectric sensor excited by a suddenly removed weight. The external circuit can be taken into account as having either a finite or infinite resistance. We also outline the parameter identification procedure based on automatic differentiation and present the experimental and numerical results.
Dynamics of a cantilever beam with piezoelectric sensor: Experimental study
Kolman, Radek ; Kylar, Jaromír ; Kotek, Vojtěch ; Cimrman, Robert ; Musil, Ladislav
Online and real-time sensing and monitoring of the health state of complex structures, such as air-craft and critical parts of power stations, is an essential part of the research in dynamics. Several types of sensors are used for sensing dynamic responses and monitoring response changes during the operation of critical parts of complex systems. The piezoelectric (PZ) materials belong to one group of electroactive materials, which transform mechanical deformation into an electrical response. For example, PZ ceramics or PVDF foils are employed for online sensing of the time history of mechanical deformation. Experimentally obtained response of a cantilever beam structure with a glued PZ sensor is the case of interest in this contribution. During the transient problem of the beam loaded by suddenly interrupted load due to the weight of a mass at the end of the beam, the time history of normal velocity at a point on the beam surface has been measured by a laser vibrometer and parallely, the output voltage on the PZ sensor has been measured by an electric device. The experimental data in the case of the first eigen-frequency is in good agreement with the value given by the formulae from the theoretical modeling of free vibration of a linear beam.
Dynamics of a cantilever beam with piezoelectric sensor: Finite element modeling
Cimrman, Robert ; Kolman, Radek ; Musil, Ladislav ; Kotek, Vojtěch ; Kylar, Jaromír
An elastodynamical model of a cantilever beam coupled with a piezoelectric sensor is introduced and its discretization using the finite element method is presented. The mathematical model includes additional terms that enforce the floating potential boundary condition for keeping a constant charge on an electrode of the sensor. The behaviour of the model is illustrated using a numerical example corresponding to an experimental setup, where vibrations of the beam and the potential on the sensor are measured.
Recycling of asphalt mixtures for low-traffic roads
Musil, Lukáš ; Dašek, Ondřej (referee) ; Varaus, Michal (advisor)
This bachelor's thesis deals with 100% pure recycling by method of hot mix asphalt recycling using a rejuvenating additive (so-called rejuvenator) for the device development in cooperation with an external company. The aim of bachelor's thesis is to determine the amount of dosing of the rejuvenator and to determine the compaction temperature for the processing the asphalt mixture. On the basis of determining the properties of the reclaimed asphalt pavement, by means of tests in the laboratory. According to the determined properties of the reclaimed asphalt pavement, the percentage of rejuvenator required to achieve the required properties of the asphalt mixture for subsequent processing and laying on the road.
Planning in Practice in the Town of Letovice
Musil, Lukáš ; Sadílek, Augustin (referee) ; Doležalová, Monika (advisor)
The diploma thesis describes the issue of urban planning. Theoretically acquaints the reader with urban planning, zoning plan and processing. The current state of the zoning plan and its changes is analyzed on the example of a selected municipality. Based on these findings, further development possibilities of the municipality are proposed.
Smart socket for electrical parameters analysis with possibility of controlling connected appliances
Musil, Libor ; Krajsa, Ondřej (referee) ; Musil, Petr (advisor)
Thesis deals with the design of intelligent electrical socket. At the beginning of the thesis, there are described the characteristics of the distribution network in the Czech Republic and the ways of measuring these properties. The selected integrated circuit that realizes the measurement is described in detail. The third chapter deals with the current possibilities of power management, especially from the perspective of the distribution company and the concept of smart networks. The fourth chapter deals with the selection of communication interface suitable for smart socket as an element of smart home. The selected IEEE 802.15.4 standard and the microcontroller implementing the communication itself are described in more detail. The following part of the work is about design of the intelligent socket development board, on which the concept is tested and the design of the final hardware is described in this chapter. The last chapter describes the measurement results realized by the created device.
Banner Advertisement in Online Marketing and its Impact on the Internet Users
Musil, Lukáš ; Vranka, Marek (advisor) ; Báča, Ladislav (referee)
The bachelor thesis focuses on the topic of banner advertising in online marketing and the influence it has on Internet users. The structure of the thesis is divided into a theoretical and practical part. The theoretical part is devoted to the general knowledge of banner advertising. It discusses reasons for using banner advertising, its individual types, targeting and purchasing of banner advertising on the Internet. These topics are divided into individual chapters that focus predominantly on banner advertising from the viewpoint of advertisers. The final two chapters of the theoretical part deal with topics related to the role of the user, namely adblocking, anti-adblocking and banner blindness. The thesis contains an analysis of these concepts describes their influence on the Internet environment. Concerning banner blindness, international studies are further used to describe banner advertising factors that can affect this phenomenon. The practical part contains an empirical analysis of different banner ad sizes based on anonymised data from concluded advertising campaigns in AdWords and Sklik. The analysis includes an evaluation of the most effective formats within the system and an analysis of the relationship between the banner ad size and its efficiency. The results indicate that the...
Business Plan for Entertainment Center Establishment
Musil, Lukáš ; Kamba, Michal (referee) ; Fojtů, Kateřina (advisor)
The subject of this bachelor thesis is the business plan for the newly established company. It is a market analysis in the entertainment industry, an analysis of competition, the competitiveness of the newly established company and a proposal for a complete implementation of the plan.
Smart aquarium management system
Musil, Libor ; Kvíčala,, Radek (referee) ; Hudcová, Lucie (advisor)
This bachelor thesis deals with the design of an intelligent aquarium management system. The system is going to be based on the i.Mx8DV platform with graphical output on the touch screen. In the thesis, the methods of measuring and controlling the quantities, that are critical for the proper operation of the aquarium, are discussed. Also, the i.Mx8DV platform and the Neutrino operating system are described. This thesis solves the selection of suitable sensors and design of printed circuit board for connection of the i.Mx8DV platform with selected sensors. The principles of network communication and web server implementation options are described. In the end, the application is described.

National Repository of Grey Literature : 23 records found   1 - 10nextend  jump to record:
See also: similar author names
3 Musil, Ladislav
2 Musil, Libor
9 Musil, Lukáš
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