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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Suppression of recoil in military equipment
 Novák, Ondřej ; Žáček, Jiří (referee) ; Klapka, Milan (advisor)
The bachelor´s thesis focuses on dampening the recoil force generated by gunshots in military technology. For this purpose, several methods are currently used, which however limit the possible capabilities of firearms with respect to their accuracy and fire rate effective while being inadaptable to variations in the firing cycle. The goal of this thesis is therefore the compilation of currently used methods and subsequent selection of areas where these methods could be substituted or amended by applying magnetorheological technology. In the first phase a research study was carried out describing the technical solutions currently in use for recoil dampening. Approximate values of recoil brake forces and energies for a commonly used weapon system was also included. In the discussion part of the thesis, the research was then evaluated with respect to the possible application of magnetorheological dampening elements. The main areas suitable for the use of this technology are large-caliber cannons and automatic cannons, in which their use could improve their accuracy and increase the controllable rate of fire while limiting the load on the carriages of these weapons. Based on this thesis, further research may be carried out, focusing on a comprehensive analysis and modelling of magnetorheological buffer use in of the mentioned areas.
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Detection of gunshots from small arms
 Nesvadba, Ondřej ; Malucha, Jan (referee) ; Sigmund, Milan (advisor)
This thesis deals with acoustical gunshot detection from small arms, typically of the calibre up to 10 mm, primarily in urban areas. Thesis includes initial research of methods, which are usually used for gunshot detection. The key part of this work is examination of typical values of gunshot signal. Based on the values obtained, decisive parameters in time and frequency domains are determined and detection algorithms are proposed. Function of these algorithms is tested and evaluated. The possible influence of various features of recordings on detection success rate was discussed.
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