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Návrh číslicově řízeného spínaného napájecího zdroje pro systém pozičních světel letadla s LED technologií
Mlčoch, Lukáš ; Pham, Ngoc Nam (oponent) ; Leuchter, Jan (vedoucí práce)
Tato bakalářská práce se v úvodu uvádí problematiku pozičních světel, a především pak jejich způsoby napájení. Pak je proveden krátký rozbor spínaných zdrojů. Kde bude čtenář seznámen s režimy fungování zdrojů (CCM a DCM). Pak je krátce uvedeno pár základních topologií, ze kterých následně tři budou vybrány pro návrh a další zpracování. Nakonec je proveden návrh řešení k předloženému problému v podobě dvou spínaných zdrojů s různými topologiemi. Po návrhu proběhlo řešení, kde byly navrženy jednotlivá schémata a obvody, které byly sestaveny a provedeno na nich základní měření pro ověření funkčnosti.
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Design of the system for the carbon composite conductive layers of the L-39NG aircraft testing and the optimization of the conductive material
Pham, Ngoc Nam ; Hönig,, Martin (oponent) ; Háze, Jiří (vedoucí práce)
In recent decades, the use of composites has been dramatically preferred in the aerospace industry. The latest projects of the Czech aviation industry also focus on increasing the use of composites in new aircraft. This thesis focusses on the research of the electrical properties of the composite in order to optimize the choice of material. The thesis presents the design of an automatic measuring station used for measuring and testing the electrical properties of composite specimens produced by the company AERO Vodochody AEROSPACE a.s. For this purpose, the device LCR bridge R&S HM8118 is used, and the control program is designed in the MATLAB environment by using the SCPI language. The proposed system is then used for experimental verification of the electrical conductivity of composite samples. The measurement results will be the basis for the development of aviation conductivity composites in new aircraft. This thesis also presents the results of the lightning strike test on the selected composite specimens. Results of the lightning strike test provide deeper knowledge about the lightning strike protection ability of specimens. The development of a Non-destructive testing system based on the method of Electrical Impedance/Resistance Tomography is also presented in this thesis. The development is in the first stages, but the system is expected to be used as a structural health monitoring system.
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Design of the system for the carbon composite conductive layers of the L-39NG aircraft testing and the optimization of the conductive material
Pham, Ngoc Nam ; Hönig,, Martin (oponent) ; Háze, Jiří (vedoucí práce)
In recent decades, the use of composites has been dramatically preferred in the aerospace industry. The latest projects of the Czech aviation industry also focus on increasing the use of composites in new aircraft. This thesis focusses on the research of the electrical properties of the composite in order to optimize the choice of material. The thesis presents the design of an automatic measuring station used for measuring and testing the electrical properties of composite specimens produced by the company AERO Vodochody AEROSPACE a.s. For this purpose, the device LCR bridge R&S HM8118 is used, and the control program is designed in the MATLAB environment by using the SCPI language. The proposed system is then used for experimental verification of the electrical conductivity of composite samples. The measurement results will be the basis for the development of aviation conductivity composites in new aircraft. This thesis also presents the results of the lightning strike test on the selected composite specimens. Results of the lightning strike test provide deeper knowledge about the lightning strike protection ability of specimens. The development of a Non-destructive testing system based on the method of Electrical Impedance/Resistance Tomography is also presented in this thesis. The development is in the first stages, but the system is expected to be used as a structural health monitoring system.
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Test Bench for Experimental Analysis of Conductive Composite Materials for Aerospace Applications.
Pham, N. N. ; Leuchter, J. ; Václavík, J.
The paper presents the materials used in aerospace industry and introduces an automated test bench for investigating these materials’ electrical properties. The test bench is also designed to investigate aviation electronic components, especially regarding electromagnetic compatibility (EMC). The test bench contains various measuring instruments which are connected to a computer (workstation). The designed program on the computer supervises identifying connected instruments and creating communication channels to those instruments. This program also controls those instruments to conduct required measurement or testing and obtain the measuring results. Instrument control is realized by using Standard Command for Programable Instrument (SCPI) commands. The program is designed in MATLAB development environment and add-on application MATLAB App Designer with toolboxes Instrument Control Toolbox and Signal Processing Toolbox.
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Wireless Battery Management System for Military Unmanned Vehicles
Pham, N. N. ; Leuchter, J. ; Dong, H. Q.
This paper introduces a Battery Management System (BMS) for Military Unmanned Vehicles, which uses multi-cell battery packs. The designed BMS is composed of slave modules and a master module. Each slave module is in charge of managing the state of one battery, include flowing current, voltage of battery, voltage of each cell, temperature of battery. From these obtained data, each module can predict the State of Charge (SoC) of connected battery. All slave modules are interconnected to the master module via Wireless Communication Protocol such as Wi-Fi, Bluetooth, or ESP-NOW. The master module will save all the received data to a microSD card, and if required, send these data to a workstation. These data are useful to predict the operation range of the vehicle, which is very important for decision the tactic of using. The designed BMS was verified in various applications in University of Defence in Brno.
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