he purpose of the article was to assess the amount of ammunition required by the border guard during the battle with the sabotage and reconnaissance group until the arrival of reinforcements. To achieve the goal, a method of mathematical modeling of combat processes in the class of Markov processes with continuous time and discrete states was chosen. As a result, the method made it possible to construct the required models, check their adequacy, due to the found internal law of battle, and evaluate the performance on a specific practical example.
{"title":"Assessment of Border Patrol Group Ammunition Amount Required for Border Fighting","authors":"V. Gorodnov, V. Kyrylenko, Yurii Y. Repilo","doi":"10.3849/aimt.01441","DOIUrl":"https://doi.org/10.3849/aimt.01441","url":null,"abstract":"he purpose of the article was to assess the amount of ammunition required by the border guard during the battle with the sabotage and reconnaissance group until the arrival of reinforcements. To achieve the goal, a method of mathematical modeling of combat processes in the class of Markov processes with continuous time and discrete states was chosen. As a result, the method made it possible to construct the required models, check their adequacy, due to the found internal law of battle, and evaluate the performance on a specific practical example.","PeriodicalId":39125,"journal":{"name":"Advances in Military Technology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44443832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The paper discusses a possibility of application of dynamic vivacity function in interior ballistic process mathematical model. At present time, various technologies of powder grain surfacing are applied, mainly in case of powder grains used in assemblies of small-calibre cartridges. The grain surfacing can desirably influence the interior ballistic action. It can further change basic powder thermodynamic properties, and particularly, it can change the character of the powder grain burning, which cannot be described by geometric burning concept. According to the established standards, a necessity of the dynamic vivacity function L evaluation is determined for artillery powders only, but the way of its evaluation can be applied for arbitrary powder grains. The application of the dynamic vivacity function then allows to get results of solution of the interior ballistic tasks with higher accuracy, as well as the selection of suitable grain surfacing technology.
{"title":"Proposal of Optimization of Depth Values in Wet Gap Crossing Military Operations","authors":"M. Sedláček, F. Dohnal","doi":"10.3849/aimt.01421","DOIUrl":"https://doi.org/10.3849/aimt.01421","url":null,"abstract":"The paper discusses a possibility of application of dynamic vivacity function in interior ballistic process mathematical model. At present time, various technologies of powder grain surfacing are applied, mainly in case of powder grains used in assemblies of small-calibre cartridges. The grain surfacing can desirably influence the interior ballistic action. It can further change basic powder thermodynamic properties, and particularly, it can change the character of the powder grain burning, which cannot be described by geometric burning concept. According to the established standards, a necessity of the dynamic vivacity function L evaluation is determined for artillery powders only, but the way of its evaluation can be applied for arbitrary powder grains. The application of the dynamic vivacity function then allows to get results of solution of the interior ballistic tasks with higher accuracy, as well as the selection of suitable grain surfacing technology.","PeriodicalId":39125,"journal":{"name":"Advances in Military Technology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43991931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Deployable chemical laboratories are considered a highly specific part of the Armed Forces of the Czech Republic, intended for Chemical, Biological, Radiological and Nuclear Defence in operations. Their professional activity is determined by a number of scientific and technical requirements, which are formulated by standards for sample identification. To achieve the required degree of credibility, it is particularly important to have specific technical capacities. This instrumentation is crucial for the implementation of laboratory analyzes. The article describes the state of chemical laboratories of the Chemical Corps in the context of standardized requirements and discusses some points of selected Alliance agreements which the Armed Forces of the Czech Republic have signed.
{"title":"Comparative Analysis of Standardized NATO Requirements for Laboratory Identification of Chemical Agents and Military Technical Means for Its Implementation","authors":"T. Rozsypal, R. Zahradníček","doi":"10.3849/aimt.01455","DOIUrl":"https://doi.org/10.3849/aimt.01455","url":null,"abstract":"Deployable chemical laboratories are considered a highly specific part of the Armed Forces of the Czech Republic, intended for Chemical, Biological, Radiological and Nuclear Defence in operations. Their professional activity is determined by a number of scientific and technical requirements, which are formulated by standards for sample identification. To achieve the required degree of credibility, it is particularly important to have specific technical capacities. This instrumentation is crucial for the implementation of laboratory analyzes. The article describes the state of chemical laboratories of the Chemical Corps in the context of standardized requirements and discusses some points of selected Alliance agreements which the Armed Forces of the Czech Republic have signed.","PeriodicalId":39125,"journal":{"name":"Advances in Military Technology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46355309","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
: This paper focuses on reducing the corrosion rate of aluminium alloy 6061 through anodizing. The study involves characterizing corrosion phenomenon that occurs on aluminium alloy 6061 in relation to parameters involved in an anodizing process, in particular the current density of anodizing, and its corrosion environment; specifically, the concentration and pH value of the corrosion accelerator. The experiment samples were anodized in sulphuric acid (H 2 SO 4 ) at a current density ranging from 0.012 A/mm 2 to 0.018 A/mm 2 . The paper also includes a qualitative analysis of corrosion images obtained from the experiment through scanning electron microscope. It concludes that corrosion rate may be reduced through an increase of current density during anodizing.
{"title":"Reduction of Corrosion Rate of Aluminium Alloy 6061 through Anodization","authors":"Samad, Ramle","doi":"10.3849/AIMT.01401","DOIUrl":"https://doi.org/10.3849/AIMT.01401","url":null,"abstract":": This paper focuses on reducing the corrosion rate of aluminium alloy 6061 through anodizing. The study involves characterizing corrosion phenomenon that occurs on aluminium alloy 6061 in relation to parameters involved in an anodizing process, in particular the current density of anodizing, and its corrosion environment; specifically, the concentration and pH value of the corrosion accelerator. The experiment samples were anodized in sulphuric acid (H 2 SO 4 ) at a current density ranging from 0.012 A/mm 2 to 0.018 A/mm 2 . The paper also includes a qualitative analysis of corrosion images obtained from the experiment through scanning electron microscope. It concludes that corrosion rate may be reduced through an increase of current density during anodizing.","PeriodicalId":39125,"journal":{"name":"Advances in Military Technology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49119547","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
: The work is devoted to the development of software complex for modeling the dynamic characteristics of a moving carrier in burst firing mode and to the study of their impact on shooting accuracy. A mathematical model for mechanical system of moving carrier is given, which allows to take into account the movement and vibrations of the helicopter, as well as the mutual influence of the system “helicopter – rocket-gun armament”. The research results of the dispersion of projectiles and rockets in serial firing, depending on the parameters of the movement of moving carrier and the shooting mode, are presented. The paper gives a description and outlines working principles of the software complex for visualization of simulation results.
{"title":"Mathematical Modeling of Shooting from Moving Carrier","authors":"Lipanov, Rusyak, Sufiyanov, Korolev","doi":"10.3849/AIMT.01377","DOIUrl":"https://doi.org/10.3849/AIMT.01377","url":null,"abstract":": The work is devoted to the development of software complex for modeling the dynamic characteristics of a moving carrier in burst firing mode and to the study of their impact on shooting accuracy. A mathematical model for mechanical system of moving carrier is given, which allows to take into account the movement and vibrations of the helicopter, as well as the mutual influence of the system “helicopter – rocket-gun armament”. The research results of the dispersion of projectiles and rockets in serial firing, depending on the parameters of the movement of moving carrier and the shooting mode, are presented. The paper gives a description and outlines working principles of the software complex for visualization of simulation results.","PeriodicalId":39125,"journal":{"name":"Advances in Military Technology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44131294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The article describes a new model for the solution of the instability problem of discrete Fourier transform (DFT) spectra leakage for the incoherent real sinusoidal signal for solving the most accurate estimation of its frequency. This paper shows this phenomenon by a new form of DFT spectrum expression. It consists mainly of the spectrum of the rectangular signal in the form of the sinc function, modulated to the frequency of the tested signal in baseband. To do this, analogous spectra from other neighboring bands formed by the sampling effect are added as aliasing. The analysis shows some ways to minimize or correct it. The paper shows a simpler and substantially lesser effect of aliasing in the DFT spectrum for a complex valued sinusoidal signal.
{"title":"The Causes of Leakage Deviations from sinc Function in DFT and Ways to Minimize Them","authors":"Hájek","doi":"10.3849/AIMT.01375","DOIUrl":"https://doi.org/10.3849/AIMT.01375","url":null,"abstract":"The article describes a new model for the solution of the instability problem of discrete Fourier transform (DFT) spectra leakage for the incoherent real sinusoidal signal for solving the most accurate estimation of its frequency. This paper shows this phenomenon by a new form of DFT spectrum expression. It consists mainly of the spectrum of the rectangular signal in the form of the sinc function, modulated to the frequency of the tested signal in baseband. To do this, analogous spectra from other neighboring bands formed by the sampling effect are added as aliasing. The analysis shows some ways to minimize or correct it. The paper shows a simpler and substantially lesser effect of aliasing in the DFT spectrum for a complex valued sinusoidal signal.","PeriodicalId":39125,"journal":{"name":"Advances in Military Technology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43196581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
: It has turned out that the usage of non-lethal weapons is an effective way of tackling adversaries in many security scenarios. The security staff’s goal is to use the lowest possible level of power needed to manage successfully the situation during the conflicts with adversaries. The security staff can employ a wide spectrum of possible reactions beginning with the voice alert through the physical interaction up to the usage of e.g. firearms. The optical incapacitating device is one of possible realizations of non-lethal weapons. There-fore, the article deals with the description of the designed optical incapacitating device and the evaluation of retina exposition when used.
{"title":"Evaluation of Retina Exposition by Optical Incapacitating Device","authors":"Racek, Baláž, Leuchter, Krejci, Bajer","doi":"10.3849/AIMT.01284","DOIUrl":"https://doi.org/10.3849/AIMT.01284","url":null,"abstract":": It has turned out that the usage of non-lethal weapons is an effective way of tackling adversaries in many security scenarios. The security staff’s goal is to use the lowest possible level of power needed to manage successfully the situation during the conflicts with adversaries. The security staff can employ a wide spectrum of possible reactions beginning with the voice alert through the physical interaction up to the usage of e.g. firearms. The optical incapacitating device is one of possible realizations of non-lethal weapons. There-fore, the article deals with the description of the designed optical incapacitating device and the evaluation of retina exposition when used.","PeriodicalId":39125,"journal":{"name":"Advances in Military Technology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41895720","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper presents an experimental and numerical modal analysis of the military vehicle hull. Due to its adaptation to various weapon systems, it is necessary to conduct detailed tests. Computer simulations are a very useful tool. To ensure the reliability of the results, it is necessary to validate the models. The modal analysis was used in this work. It was carried out using the roving hammer method. Both natural frequency and mode shape were compared. The Modal Assurance Criterion was used for the comparison. To determine areas of noncompliance, distributions of relative differences between experimental and finite element (FE) mode shapes were prepared. The presented results indicate a large convergence between the results of numerical and experimental analyses.
{"title":"Experimental and Numerical Modal Analysis of the Military Vehicle Hull","authors":"Hryciow, Wisniewski, Rybak","doi":"10.3849/AIMT.01427","DOIUrl":"https://doi.org/10.3849/AIMT.01427","url":null,"abstract":"This paper presents an experimental and numerical modal analysis of the military vehicle hull. Due to its adaptation to various weapon systems, it is necessary to conduct detailed tests. Computer simulations are a very useful tool. To ensure the reliability of the results, it is necessary to validate the models. The modal analysis was used in this work. It was carried out using the roving hammer method. Both natural frequency and mode shape were compared. The Modal Assurance Criterion was used for the comparison. To determine areas of noncompliance, distributions of relative differences between experimental and finite element (FE) mode shapes were prepared. The presented results indicate a large convergence between the results of numerical and experimental analyses.","PeriodicalId":39125,"journal":{"name":"Advances in Military Technology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42821379","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effect of Some Disturbance Factors on the Motion Stability of Unguided Rockets","authors":"B. Le, Konečný","doi":"10.3849/AIMT.01379","DOIUrl":"https://doi.org/10.3849/AIMT.01379","url":null,"abstract":"","PeriodicalId":39125,"journal":{"name":"Advances in Military Technology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45712976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
: The article focuses on the development of the new calculation method of jet penetration into the target using ANSYS AUTODYN simulation. The jet formation and its penetration capability dependence on properties of targets are studied. Two kinds of steel armours Armox 440T and S235JR – in standardized plates of thickness 20 mm are used as materials of the target. The paper contains an analysis of the penetration depth in the targets containing the pure material plates set, combined material plates set and sets of Armox 440T plates with gaps 10 mm and 20 mm among individual plates. The theoretical results of simulation are compared with the results of experiments.
{"title":"Effect of Target Arrangement and Target Materials Properties on Penetration Depth","authors":"Sy Ngo, Beer, Konečný","doi":"10.3849/AIMT.01341","DOIUrl":"https://doi.org/10.3849/AIMT.01341","url":null,"abstract":": The article focuses on the development of the new calculation method of jet penetration into the target using ANSYS AUTODYN simulation. The jet formation and its penetration capability dependence on properties of targets are studied. Two kinds of steel armours Armox 440T and S235JR – in standardized plates of thickness 20 mm are used as materials of the target. The paper contains an analysis of the penetration depth in the targets containing the pure material plates set, combined material plates set and sets of Armox 440T plates with gaps 10 mm and 20 mm among individual plates. The theoretical results of simulation are compared with the results of experiments.","PeriodicalId":39125,"journal":{"name":"Advances in Military Technology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47184163","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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