Heat-related illnesses are a problem for a lot of troops in the world. Thus, this work aimed to analyze the thermal stress control mechanisms applicable to troops in military operations. For this reason, it was chosen to address the following topics: basic aspects of thermoregulation in hot environments, and heat stress control mechanisms in military operations (adaptation to heat; rest, hydration, and replenishment of hydro-electrolytes; immersion cooling; and personal cooling systems). It can be concluded that some operational situations can impose thermal stress on the military beyond normal thermoregulatory capacity, requiring adequate intervention to dissipate body heat and maintain work capacity over time.
{"title":"Heat Stress Control Mechanisms in Military Operations","authors":"Eduardo Borba Neves","doi":"10.3849/aimt.01740","DOIUrl":"https://doi.org/10.3849/aimt.01740","url":null,"abstract":"Heat-related illnesses are a problem for a lot of troops in the world. Thus, this work aimed to analyze the thermal stress control mechanisms applicable to troops in military operations. For this reason, it was chosen to address the following topics: basic aspects of thermoregulation in hot environments, and heat stress control mechanisms in military operations (adaptation to heat; rest, hydration, and replenishment of hydro-electrolytes; immersion cooling; and personal cooling systems). It can be concluded that some operational situations can impose thermal stress on the military beyond normal thermoregulatory capacity, requiring adequate intervention to dissipate body heat and maintain work capacity over time.","PeriodicalId":39125,"journal":{"name":"Advances in Military Technology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46660750","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 aim of the article was to determine the long-range assets effectivity dependence on the method of their employment. To achieve this goal, the mathematical model of combat employment of long-range assets based on the theory of Markov processes with continuous time and discrete states was improved. In contrast to the existing ones, the improved mathematical model includes a state in which the asset launches a second missile strike from the firing position from which the previous missile strike was launched. This provides the possibility to model the method of combat employment of the assets, the implementation of which makes it possible to increase the number of missile strikes made in a certain time by these assets. This is the essence of long-range assets effectivity employment.
{"title":"Long-Range Assets Effectivity Dependence on the Method of Their Employment","authors":"Volodymyr Prymirenko, R. Shevtsov, P. Open’ko","doi":"10.3849/aimt.01559","DOIUrl":"https://doi.org/10.3849/aimt.01559","url":null,"abstract":"The aim of the article was to determine the long-range assets effectivity dependence on the method of their employment. To achieve this goal, the mathematical model of combat employment of long-range assets based on the theory of Markov processes with continuous time and discrete states was improved. In contrast to the existing ones, the improved mathematical model includes a state in which the asset launches a second missile strike from the firing position from which the previous missile strike was launched. This provides the possibility to model the method of combat employment of the assets, the implementation of which makes it possible to increase the number of missile strikes made in a certain time by these assets. This is the essence of long-range assets effectivity employment.","PeriodicalId":39125,"journal":{"name":"Advances in Military Technology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42807888","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 current geopolitical situation in the Europe is forcing some countries to modernize the equipment and armaments of their armies and to prepare for response to potential threats. It is difficult to assess the advantageousness and quality of military logistics vehicles to be purchased when there are different perceptions of the functionality of the product among future users, and in particular when the quality assessment tools are not perfect and the available and statutory quality assessment tools are hardly used in tendering procedures. This article presents the methodology for the evaluation of military logistics vehicles in public procurement. The proposed methodology allows comparing military logistics vehicles on the basis of economic and technical criteria and assessing the needs of different users.
{"title":"Evaluation of Military Logistics Vehicles in Public Procurement","authors":"N. Dobržinskij, J. Furch, Rasa Dobrzinskiene","doi":"10.3849/aimt.01737","DOIUrl":"https://doi.org/10.3849/aimt.01737","url":null,"abstract":"The current geopolitical situation in the Europe is forcing some countries to modernize the equipment and armaments of their armies and to prepare for response to potential threats. It is difficult to assess the advantageousness and quality of military logistics vehicles to be purchased when there are different perceptions of the functionality of the product among future users, and in particular when the quality assessment tools are not perfect and the available and statutory quality assessment tools are hardly used in tendering procedures. This article presents the methodology for the evaluation of military logistics vehicles in public procurement. The proposed methodology allows comparing military logistics vehicles on the basis of economic and technical criteria and assessing the needs of different users.","PeriodicalId":39125,"journal":{"name":"Advances in Military Technology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44606705","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 purpose of the article was to find the inner properties and regularities of anti-aircraft missile grouping’s air defense battle, and based on these regularities to develop and evaluate the adequacy of models as tools for forecasting the results of a battle. To achieve the goal, an example of a real battle and a special model development method were used. The method made it possible to identify the main properties and the inner law of battle, to select a statistically valid mathematical modeling tool in the class of Markov processes with continuous time and discrete states, to develop the desired models with an analytical representation of the inner law of battle, to check their adequacy and to evaluate the accuracy of forecasting by models using the example of a real air defense battle.
{"title":"Inner Law and Models for Forecasting the Results of Air Defense Battle","authors":"V. Gorodnov, V. Ovcharenko","doi":"10.3849/aimt.01564","DOIUrl":"https://doi.org/10.3849/aimt.01564","url":null,"abstract":"The purpose of the article was to find the inner properties and regularities of anti-aircraft missile grouping’s air defense battle, and based on these regularities to develop and evaluate the adequacy of models as tools for forecasting the results of a battle. To achieve the goal, an example of a real battle and a special model development method were used. The method made it possible to identify the main properties and the inner law of battle, to select a statistically valid mathematical modeling tool in the class of Markov processes with continuous time and discrete states, to develop the desired models with an analytical representation of the inner law of battle, to check their adequacy and to evaluate the accuracy of forecasting by models using the example of a real air defense battle.","PeriodicalId":39125,"journal":{"name":"Advances in Military Technology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43284440","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 presents an experiment performed in the MasaSword version 6.17.1 environment in evaluating the effectiveness of an attack on ground targets within a close air support mission to an opponent on the march or in a defensive position, or in an attack. The ground unit commander has performed an analysis of available firepower based on aerial reconnaissance and he decided to use the allocated aircraft with different types of ammunition. The key element is the effect of selected weapons and ammunition on the enemy’s targets according to the required level of target elimination. The article also evaluates the possibilities offered by the use of MasaSword in the decision-making process of the commander when making decisions.
{"title":"Use of a Tactical Decision Support System within the Ground Unit Commander’s Decision-making Process","authors":"Z. Korecki, Tomas Hoika, Jiří Ulvr, Teodor Baláz","doi":"10.3849/aimt.01551","DOIUrl":"https://doi.org/10.3849/aimt.01551","url":null,"abstract":"The article presents an experiment performed in the MasaSword version 6.17.1 environment in evaluating the effectiveness of an attack on ground targets within a close air support mission to an opponent on the march or in a defensive position, or in an attack. The ground unit commander has performed an analysis of available firepower based on aerial reconnaissance and he decided to use the allocated aircraft with different types of ammunition. The key element is the effect of selected weapons and ammunition on the enemy’s targets according to the required level of target elimination. The article also evaluates the possibilities offered by the use of MasaSword in the decision-making process of the commander when making decisions.","PeriodicalId":39125,"journal":{"name":"Advances in Military Technology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45403082","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}
M. Popov, S. Stankevich, S. Mosov, O. Titarenko, S. Dugin, S. Golubov, A. Andreiev
The paper proposes a method for minefields mapping by the centimeter resolution imagery from a copter-type unmanned aerial vehicle (UAV) which is equipped with multispectral camera and thermal infrared camera. The research methodology is the probability fusion by each sensor and the subsequent decision making on the landmine presence/absence. Models for the landmine detection in multispectral and thermal images are considered. The training sample structuration is proposed for the landmine detection reliability enhancement. The local temperature anomalies of landmine size are allocated by sliding window scanning the thermal image. The experimental performance of actual landmines detection at a special test site in Ukraine is described. The probability of correct landmine detection was 0.92 while with a false alarm probability it was 0.45.
{"title":"Method for Minefields Mapping by Imagery from Unmanned Aerial Vehicle","authors":"M. Popov, S. Stankevich, S. Mosov, O. Titarenko, S. Dugin, S. Golubov, A. Andreiev","doi":"10.3849/aimt.01722","DOIUrl":"https://doi.org/10.3849/aimt.01722","url":null,"abstract":"The paper proposes a method for minefields mapping by the centimeter resolution imagery from a copter-type unmanned aerial vehicle (UAV) which is equipped with multispectral camera and thermal infrared camera. The research methodology is the probability fusion by each sensor and the subsequent decision making on the landmine presence/absence. Models for the landmine detection in multispectral and thermal images are considered. The training sample structuration is proposed for the landmine detection reliability enhancement. The local temperature anomalies of landmine size are allocated by sliding window scanning the thermal image. The experimental performance of actual landmines detection at a special test site in Ukraine is described. The probability of correct landmine detection was 0.92 while with a false alarm probability it was 0.45.","PeriodicalId":39125,"journal":{"name":"Advances in Military Technology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41944242","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}
In the article, the joint analysis of the Bernoulli equations for compressed gas, variations of the supersonic flow parameters of the Prandtl-Meyer expansion fan and the hypothesis of aerofoil dynamic curvature were used to develop a linear and a nonlinear mathematical models describing the occurrence of transonic flutter of aerodynamic control surfaces of supersonic aircraft. The analysis of the obtained mathematical models confirms a theoretical possibility of the occurrence of transonic flutter of aerodynamic control surfaces of supersonic aircraft that is due to the peculiarities of the interaction of shock waves with the angular velocity of elastic bending oscillations of aerodynamic control surfaces.
{"title":"Mathematical Models of Transonic Flatter of Aerody-namic Control Surfaces of Supersonic Aircraft","authors":"O. Safronov, B. Semon, O. Nedilko, Yurii Bodryk","doi":"10.3849/aimt.01543","DOIUrl":"https://doi.org/10.3849/aimt.01543","url":null,"abstract":"In the article, the joint analysis of the Bernoulli equations for compressed gas, variations of the supersonic flow parameters of the Prandtl-Meyer expansion fan and the hypothesis of aerofoil dynamic curvature were used to develop a linear and a nonlinear mathematical models describing the occurrence of transonic flutter of aerodynamic control surfaces of supersonic aircraft. The analysis of the obtained mathematical models confirms a theoretical possibility of the occurrence of transonic flutter of aerodynamic control surfaces of supersonic aircraft that is due to the peculiarities of the interaction of shock waves with the angular velocity of elastic bending oscillations of aerodynamic control surfaces.","PeriodicalId":39125,"journal":{"name":"Advances in Military Technology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49395723","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}
M. Remadevi, Gilu K. Abraham, R. Rajesh, N. Sureshkumar
This paper investigates the problem of cancellation of noise generated by own platform in shallow water scenario. In the case of underwater acoustics, the target signal detection and tracking in the presence of tow ship noise is a challenging task. A computationally intensive technique is necessary for tow ship noise suppression. In this paper, an algorithm using deep regression neural network (DRNN) along with minimum variance distortionless response (MVDR) beamformer is presented for tow ship noise cancellation. Nine DRNN’s each with different weight initialization techniques and activation functions are designed for effective tow ship noise cancellation. The designed DRNNs is tested using the simulated data and further validated using the real data collected during the trials from Arabian Sea.
{"title":"Adaptive Tow Ship Noise Cancellation Using Deep Regression Neural Network","authors":"M. Remadevi, Gilu K. Abraham, R. Rajesh, N. Sureshkumar","doi":"10.3849/aimt.01522","DOIUrl":"https://doi.org/10.3849/aimt.01522","url":null,"abstract":"This paper investigates the problem of cancellation of noise generated by own platform in shallow water scenario. In the case of underwater acoustics, the target signal detection and tracking in the presence of tow ship noise is a challenging task. A computationally intensive technique is necessary for tow ship noise suppression. In this paper, an algorithm using deep regression neural network (DRNN) along with minimum variance distortionless response (MVDR) beamformer is presented for tow ship noise cancellation. Nine DRNN’s each with different weight initialization techniques and activation functions are designed for effective tow ship noise cancellation. The designed DRNNs is tested using the simulated data and further validated using the real data collected during the trials from Arabian Sea.","PeriodicalId":39125,"journal":{"name":"Advances in Military Technology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46911667","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}
M. Macák, P. Vyroubal, T. Kazda, D. Capková, J. Maxa
Lithium-sulfur batteries appear to be an exciting technology for energy storage due to their many advantageous properties. Due to its low weight and high energy, this technology could be used in aviation, aerospace or in heavy electric vehicles or even for mobile applications. This article investigates possible approaches for modelling of lithium-sulfur batteries. A new method using Ansys Fluent add-on Multi-Scale Multi-Domain battery module, originally designed for lithium-ion batteries, is presented. Battery characteristics are described through an equivalent circuit model, which can capture its complex characteristics. The results suggest that the built-in Ansys Fluent model can be successfully extended for 3D modelling of lithium-sulfur batteries. The critical point of the simulation is the precise definition of equivalent circuit model parameters.
{"title":"Numerical Modelling of Discharging the Lithium-Sulphur Batteries in Ansys Fluent","authors":"M. Macák, P. Vyroubal, T. Kazda, D. Capková, J. Maxa","doi":"10.3849/aimt.01525","DOIUrl":"https://doi.org/10.3849/aimt.01525","url":null,"abstract":"Lithium-sulfur batteries appear to be an exciting technology for energy storage due to their many advantageous properties. Due to its low weight and high energy, this technology could be used in aviation, aerospace or in heavy electric vehicles or even for mobile applications. This article investigates possible approaches for modelling of lithium-sulfur batteries. A new method using Ansys Fluent add-on Multi-Scale Multi-Domain battery module, originally designed for lithium-ion batteries, is presented. Battery characteristics are described through an equivalent circuit model, which can capture its complex characteristics. The results suggest that the built-in Ansys Fluent model can be successfully extended for 3D modelling of lithium-sulfur batteries. The critical point of the simulation is the precise definition of equivalent circuit model parameters.","PeriodicalId":39125,"journal":{"name":"Advances in Military Technology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41614033","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}
Base bleed, in which gases are discharged at the base of projectile, is confirmed to be an effective drag reduction technique. Itis believed that the design of base exit can impact the pattern of gas bleeding and, hence, the level of drag reduction. The present study is aimed to address this dependence that was not clarified in previous studies by examining the reduction in drag acting on a projectile with two different base bleed exit configurations. The first configuration includes a central circular orifice while the other is modified to include a smaller central circular orifice and four annular slots with equivalent total area. Numerical simulations on 3‑D computational domain have been conducted to estimate drag and to explore the base flowfield for each configuration. The computational results at different Mach numbers have been compared with the mean drag based on range shooting for projectiles with both base configurations. In addition, different simulations have been performed to predict the real pattern of bleeding through the modified configuration based on the comparison with firing data at different Mach numbers.
{"title":"Live Firing and 3D Numerical Investigation of Base Bleed Exit Configuration Impact on Projectile Drag","authors":"M. Aziz, A. Ibrahim, A. Riad, M. Ahmed","doi":"10.3849/aimt.01529","DOIUrl":"https://doi.org/10.3849/aimt.01529","url":null,"abstract":"Base bleed, in which gases are discharged at the base of projectile, is confirmed to be an effective drag reduction technique. Itis believed that the design of base exit can impact the pattern of gas bleeding and, hence, the level of drag reduction. The present study is aimed to address this dependence that was not clarified in previous studies by examining the reduction in drag acting on a projectile with two different base bleed exit configurations. The first configuration includes a central circular orifice while the other is modified to include a smaller central circular orifice and four annular slots with equivalent total area. Numerical simulations on 3‑D computational domain have been conducted to estimate drag and to explore the base flowfield for each configuration. The computational results at different Mach numbers have been compared with the mean drag based on range shooting for projectiles with both base configurations. In addition, different simulations have been performed to predict the real pattern of bleeding through the modified configuration based on the comparison with firing data at different Mach numbers.","PeriodicalId":39125,"journal":{"name":"Advances in Military Technology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70004534","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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