AiMT Volume 11 (2016), Issue 2

6th International Conference on Military Technologies

May 31 to June 2, 2017 Brno, Czech Republic

Call for Papers

Editorial

Z. Vintr

Comparisons Using Methods of Continuum Mechanics and Monte Carlo at Differentially Pumped Chamber

J. Maxa, M. Bílek, P. Hlavatá, P. Vyroubal and K. Lepltová

The article deals with the analysis of gas flows in pumped canals in differential pumped chamber of the Environmental Scanning Electron Microscope (ESEM). The article compares and verifies existing results of differentially pumped chamber flow simulation from ANSYS Fluent system, which uses the mechanics of continuum, with the ones published by D. Danilatos using the Monte Carlo method.

Keywords: ANSYS Fluent, differentially pumped chamber, EREM, Monte Carlo, SolidWorks.

Pages: 143–150  [References]   [Download Citation]

Combining Template Matching and Background Subtraction Techniques to Detect Objects in Infrared Video Sequences

I. Q. Pham, R. Jalovecký and M. Polášek

In this paper, an algorithm is introduced combining a template matching technique with background subtraction to detect moving targets on a road captured on video using a static camera. The designed algorithm based on combining the two techniques is to reduce the difficulties in background estimation and improve the processing time, etc. The proposed algorithm was tested in two different video sequences. The first video sequence was filmed with stabilized camera, while the second video was acquired with unstable camera. The results in both cases indicated that the background subtraction algorithm is successful in detecting moving objects and the template matching technique is suitable for object replacement from background frame to acquire the standard background frame.

Keywords: background estimation, background subtraction, infrared images, normalized 2-D cross correlation, object detection, template matching technique, video surveillance.

Pages: 151–158   [References]   [Download Citation]

Language Representations Based on C-BML and Their Processing

L. Dedera and M. Benčík

The paper tries to put together one computer languages view on Battle Management Languages (BMLs) with the current C-BML Phase 1 Standard: We present a case study on creating language representations by means of formal parsable context-free grammars and corresponding language processors in the area of military C2 systems utilizing the standardized C-BML data structures. We point out how techniques and tools previously used in the area of compilers (namely Flex, Bison) are exploitable in the military domain and thus might be helpful in integration of national command and control systems and deployment in multinational environment. We start with an introduction to C-BML principles and data model; next we describe the basis for our (Slovak) language representation followed by its specification in the form of a parsable context-free grammar; next follows the section devoted to the lexical, syntactic, and semantic processing of the language representation with the utilisation of Flex and Bison tools.

Keywords: C-BML, MSDL, Domain-Specific Language, grammar, syntax, semantics, language processor.

Pages: 159–170   [References]   [Download Citation]

Improvement of Low-Cost MEMS Gyroscope Characteristics by Data Filtering and Fusion

M. Laššák and K. Draganová

Advancement of the MEMS technology at the end of the 20th century allowed mankind to realize the things which had been unthinkable until then. Modern technological procedures have enabled a mass production of sensors and actuators of miniature dimensions with low purchase costs. The article deals with the fundamental principle of the MEMS gyroscopes as angular velocity sensors and with the necessary output data filtering and fusion with other inertial sensors to improve quality and precision of the angular velocity and position angles determination.

Keywords: MEMS gyroscope, filtering, data fusion.

Pages: 171–178   [References]   [Download Citation]

Adhesive Composites in Repairing Weapon Systems

T. Smal

The article presents the classification and application areas of adhesives while repairing weapon systems, research on adhesive materials’ durability, research on mechanical and strength properties of adhesive composites, research on durability of adhesive composites and methodology of their selection for expedient (temporary) repair in the field. The conducted research indicates certain constraints concerning the application of the examined adhesive materials. Consequently, any repairs provided with the use of adhesives should be in most cases only of temporary nature so that certain damage can be fixed quickly but only for a time of the particular task. It seems that the obtained research results, introduce issues of effective and efficient organization of the mentioned type of repair.

Keywords: adhesive composites, field repairs, strength, durability, methodology of adhesives selection.

Pages: 179–196   [References]   [Download Citation]

Acceptable Risk in Military Bridge Evaluation

A.J. MacDonald, R. Gordon Wight and F. Michael Bartlett

In military bridge evaluation, acceptable life-safety risk in crossings should be aligned with the acceptable life-safety risk of the associated military operation. A continuum of acceptable life-safety risk exists for military operations, thus a continuum of acceptable life-safety risk for military vehicles crossing bridges exists. The paper relates military mission life-safety acceptable risk levels to acceptable bridge crossing life-safety risk in an approximate quantitative manner. A continuum of acceptable life-safety risk for military bridge crossings provides flexibility in mission planning and execution, while providing engineers a basis to conduct military bridge evaluation that is consistent with the mission intent.

Keywords: acceptable risk, bridge evaluation, life-safety, military risk, operations.

Pages: 197–209   [References]   [Download Citation]

TECHNICAL INFORMATION
Statistics of Aviation Accidents and Preconditions for Aviation Accidents in Czechoslovak and Czech Military Jet Aircraft: Fire

O. Zavila, R. Chmelík and M. Dopaterová

The article deals with the statistics of aviation accidents and preconditions for aviation accidents focusing on fires in military jet fighter, trainer-fighter and trainer aircraft in the service of Czechoslovakia and the Czech Republic from 1948 until the end of 2015. It presents a unique, previously unpublished, comprehensive overview of air disasters, crashes, damage and preconditions for aviation accidents broken down by aircraft types, as well as a complete list of military regulations containing classifications of such emergency occurrences in Czechoslovak and Czech military aviation over the past 70 years. The overviews are accompanied by explanations on the context and development trends in Czechoslovak and Czech military aviation flight safety and with a unique overview of still available reference and information sources on the subject.

Keywords: Army of the Czech Republic, Czechoslovak Army, Czechoslovak People’s Army, aviation accident, fire, jet fighter, statistics.

Pages: 211–226   [References]   [Download Citation]

TECHNICAL INFORMATION
Support for Protection of the Large Object Using UAVs

M. Blišťanová, J. Blažek, P. Blišťan, J. Reitšpís and P. Havaj

The article represents a contribution to the protection of a specific object with a large perimeter in difficult terrain conditions. The introduction covers the complex issue of protection of objects as well as a justified usage of Unmanned Aerial vehicles (UAVs) with a camera as a potential technical element of the protection. The crucial part of the contribution is in the form of a specific case study for the purposes of protection and monitoring of the entrance of unauthorized persons into a dangerous area of a former mine. It is proven that the usage of UAVs is, or, more precisely, might be highly effective. However, the discussion points out some actual legislative issues related to using the UAVs equipped with cameras in relation to commercial, but mainly noncommercial, thus scientific-research activity in the context of the Slovak Republic.

Keywords: UAV, monitoring, security, protection.

Pages: 227–237   [References]   [Download Citation]

Comparison of Turbulence Models in OpenFOAM for 3D Simulation of Gas Flow in Solid Propellant Rocket Engine

P. Konečný and R. Ševčík

The aim of this paper is to compare various mathematical models simulating the turbulent flow in a solid propellant rocket engine. For comparison, the most frequently used models were chosen for simulations of flow in the S5 rocket engine. For this type of engine experimental data are available allowing comparison of the simulations with reality. The LES Smagorinsky model provided the best results, while type RANS models appeared to be less suitable for this task.

Keywords: turbulent flow, turbulent model, solid propellant rocket engine, OpenFOAM.

Pages: 239–251   [References]   [Download Citation]

TECHNICAL INFORMATION
Specific Aspects of Bridge Construction in the Central African Republic

M. Benda, D. Coufal and J. Sobotka

The paper deals with an operation of Italian engineers in Central African Republic (CAR). The aim of the operation was to construct the temporary bridge. This operation was supported by 15th Engineering Regiment and the University of Defence. Two soldiers from the 15th Engineering Regiment were sent to CAR to help Italian engineers. During this operation REACH-BACK concept between University of Defence and 15th Engineer Regiment was used. Communication and cooperation between these units was supported by Information Portal of Engineer Corps. The portal works as a support element for REACH-BACK concept.

Keywords: Engineer, Reach-Back, temporary bridges, TMS bridge type.

Pages: 253–260   [References]   [Download Citation]

BOOK REVIEW
Air and Missile Defense Systems Engineering

Warren J. Boord and John B. Hoffman

Pages: 261–263

Impressions from the Future Soldier Systems Conference 2016

Press Release