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Energy efficient hydraulic system design for force loading of vehicle drivetrain systems
Robenek, Vít ; Ožana, Otakar (referee) ; Houška, Pavel (advisor)
The thesis focuses on a hydraulic system design for a specific application of hydrostatic drive with regard to energy efficiency of proposed solution. Standard hydraulic and electronic components are used, mostly products of Bosch Rexroth. The aim of the thesis is to carry out a complex design from mechanic through hydraulic up to the electronic part of the system. After a short introduction in the beginning of the thesis is the particular application described and analyzed. Then the elemental principles of hydraulic devices and systems are explained. In the following part the actual solution is presented, which expands to several different alternatives. These alternatives are compared according to set criteria and the selected alternative is then further developed. At the end of the thesis, the outputs are evaluated and the direction of further possible improvements in the design is outlined.
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Adaptive frequency filter
Kříž, Petr ; Hájek, Karel (referee) ; Sedláček, Jiří (advisor)
The aim of this work is to design a filter of the type low–pass of order 5th with Butterworth’s approximation in the range of over-tuning 10 – 100 kHz and if it will be possible so! achieve even higher marginal frequencies. To compare two typical representatives of the frequency filters cascading and non-cascading synthesis from the viewpoint the accuracy of an! approximation function, sensitivity to the tolerance values of components, number of the components (mainly OZ) and viability, especially the possibility of electronic over-tuning in selected frequency range. On the basis of these conditions will be chosen one design, which will be realized later. Further it will be necessary to consider the possibilities of electronic over-tuning and to choose for this over-tuning suitable component, to design user management changes of marginal frequency fm by the help of keyboard + LCD and control application on the PC. For this hardware will be programmed appropriate control software. At the end of this work will be constructed appropriate device, which fullfils requirements written above and will be subjected to the laboratory measurements that verify function of this device. The constructional details of the filter are presented in the enclosure at the end of this work. At the CD are available all materials, which were created during the master’s thesis or which are necessarily concerned.
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Electrification and Control System Integration into the mobile log saw
Pospíšil, Jakub ; Bradáč, Zdeněk (referee) ; Arm, Jakub (advisor)
The semestral thesis deals with electrical system design for mobile bandsaw mill electrification. Includes technical data and parameters of the machine its required properties and functions. Contains detail informations necessary for electrical installation and electrical control design. It provides data for printed circuit board manufacture. The reasons for the each eletrical component use are explained. All the design is made with regard to safety and easy to use. Last part is dedicated to the next software development.
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Behavioral models of active elements with possibility of independent multi-parameter control
Novotný, Jakub ; Hruboš, Zdeněk (referee) ; Šotner, Roman (advisor)
This thesis is focused on behavioral modelling of active elements with independent multi-parameter electronic control using comercially available components. In a first part of the thesis, CVDIBA, CVDOBA, CVCC and OC elements are discussed. The functionality is verified by simulations using OrCAD PSpice. Used components are diamond transistor OPA860, variable gain amplifier LMH6505, differencing amplifier AD830, low distortion differential driver AD8138, current conveyor EL2082 and current mode four quadrant multiplier EL4083. Four active elements are further built on PCB and measured. Some applications like low pass filter, high pass filter, all pass filter and reconfigurable filter.
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Electronically Configurable Transfer Structures
Langhammer, Lukáš ; Hospodka, Jiří (referee) ; Vávra, Jiří (referee) ; Šotner, Roman (advisor)
Práce se zaměřuje na vývoj a výzkum v oblasti elektronicky rekonfigurovatelných přenosových struktur. Primárním cílem je návrh těchto struktur za užití moderních elektronicky řiditelných aktivních prvků. V práci je prezentováno množství elektronicky rekonfigurovatelných filtračních struktur, jež byly vytvořeny za užití různých návrhových metod. Důraz je dále kladen na možnost řídit některý z typických parametrů filtru pomocí řiditelných aktivních prvků. Práce dále obsahuje několik obvodových návrhů aktivních prvků či stavebních bloků s vhodně řešenou elektronickou řiditelností, tak, aby tyto prvky/bloky mohly být dále použity pro návrh elektronicky rekonfigurovatelných filtrů. Správnost návrhu jednotlivých zapojení je podpořena PSpice a Cadence simulacemi s modely na tranzistorové úrovni. Vybraná zapojení jsou dále realizována za pomocí dostupných aktivních prvků a podrobena experimentálnímu měření.
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Design and implementation of behavioral block models of active elements
Lipčej, Martin ; Koton, Jaroslav (referee) ; Jeřábek, Jan (advisor)
Bachelor thesis is focused on electronically controlled modern active elements, their typical behavior and particularly on design of composite function blocks. General study of analog signal processing using active elements in current, or mixed mode is presented, including their ideal behavior. For selected basic active elements, in particular Operati- onal Transconductance Amplifier and Second-Generation Current Conveyor, were found suitable simulation models of commercially produced active elements with the aim of designing composite function blocks CCTA, VDTA and VDCC. The potential possibility of independent control of their parameters is also considered. The simulated circuits using behavioral models of real components are presented in the following chapters, including their manufacturer indicated properties and examples of parameter control. The thesis then presents the simulation results of all possible circuit variants of the three active function blocks. The main benefit of this project is the ge- neral introduction to current mode active elements, design of unconventional functional blocks using real components and the final evaluation of presented simulations, including comprarison with their theoretical behavior. The conclusion aims to summarize the most appropriate combination of components, including manufacturing of VDTA and VDCC.
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Electronically Configurable Transfer Structures
Langhammer, Lukáš ; Hospodka, Jiří (referee) ; Vávra, Jiří (referee) ; Šotner, Roman (advisor)
Práce se zaměřuje na vývoj a výzkum v oblasti elektronicky rekonfigurovatelných přenosových struktur. Primárním cílem je návrh těchto struktur za užití moderních elektronicky řiditelných aktivních prvků. V práci je prezentováno množství elektronicky rekonfigurovatelných filtračních struktur, jež byly vytvořeny za užití různých návrhových metod. Důraz je dále kladen na možnost řídit některý z typických parametrů filtru pomocí řiditelných aktivních prvků. Práce dále obsahuje několik obvodových návrhů aktivních prvků či stavebních bloků s vhodně řešenou elektronickou řiditelností, tak, aby tyto prvky/bloky mohly být dále použity pro návrh elektronicky rekonfigurovatelných filtrů. Správnost návrhu jednotlivých zapojení je podpořena PSpice a Cadence simulacemi s modely na tranzistorové úrovni. Vybraná zapojení jsou dále realizována za pomocí dostupných aktivních prvků a podrobena experimentálnímu měření.
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Electronic control system as an alternative to custody
Homolová, Karolína ; Bohuslav, Lukáš (referee)
Electronic control system as an alternative to custody Abstract In the framework of the criminal justice process, the scope of using technical means through electronic monitoring is worldwide very extended indeed, being applicated in all stages of criminal proceedings. Although the most frequent manner while analysing the electronic control is the house arrest or release from imprisonment by conditional parole, electronic monitoring system finds its purpose also in pre-trial detention. Arrest is intended to be an exceptional institute of criminal proceedings, only to be used as necessary and proportionate measure and in compliance with the presumption of innocence and the constitutional right to personal freedom. In accordance with this concept, it is necessary to consider all time in the duration of custody whether the reasons for pre-trial detention still last and whether it would not rather be replaced by some alternative. The first electronic monitoring permanent program was launched in Czech republic in September 2018, so we have only a few experiences in this field so far. The aim of this paper is to identify some best practices to enhance the effectiveness of electronic monitoring as an alternative to custody in the Czech legal order and also to propose an amendments to the legislation of this...
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Electronic control system as an alternative to custody
Homolová, Karolína ; Galovcová, Ingrid (advisor) ; Tlapák Navrátilová, Jana (referee)
Electronic control system as an alternative to custody Abstract In the framework of the criminal justice process, the scope of using technical means through electronic monitoring is worldwide very extended indeed, being applicated in all stages of criminal proceedings. Although the most frequent manner while analysing the electronic control is the house arrest or release from imprisonment by conditional parole, electronic monitoring system finds its purpose also in pre-trial detention. Arrest is intended to be an exceptional institute of criminal proceedings, only to be used as necessary and proportionate measure and in compliance with the presumption of innocence and the constitutional right to personal freedom. In accordance with this concept, it is necessary to consider all time in the duration of custody whether the reasons for pre-trial detention still last and whether it would not rather be replaced by some alternative. The first electronic monitoring permanent program was launched in Czech republic in September 2018, so we have only a few experiences in this field so far. The aim of this paper is to identify some best practices to enhance the effectiveness of electronic monitoring as an alternative to custody in the Czech legal order and also to propose an amendments to the legislation of this...
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Electrification and Control System Integration into the mobile log saw
Pospíšil, Jakub ; Bradáč, Zdeněk (referee) ; Arm, Jakub (advisor)
The semestral thesis deals with electrical system design for mobile bandsaw mill electrification. Includes technical data and parameters of the machine its required properties and functions. Contains detail informations necessary for electrical installation and electrical control design. It provides data for printed circuit board manufacture. The reasons for the each eletrical component use are explained. All the design is made with regard to safety and easy to use. Last part is dedicated to the next software development.
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