- Research Article
1
- 10.5937/str2500002m
- Jan 1, 2025
- Scientific Technical Review
- Rexhep Mustafovski
Modern military missions demand secure and real-time UAV-to-command communication. This paper evaluates the SecuDroneComm platform through simulations using MATLAB and NS3. Key performance metrics: latency, throughput, and mission success rate were assessed under hostile and constrained environments. SecuDroneComm, featuring a hybrid server setup, AES-256 encryption, and SDN-inspired logic, consistently outperformed traditional ICT platforms. The platform demonstrated reduced latency, improved system uptime, and better mission coordination. Encryption overhead was offset by dynamic routing, ensuring data integrity and responsiveness. Comparative graphs highlight operational advantages across several mission-critical parameters. The results confirm SecuDroneComm's suitability for deployment in secure military UAV communications. By ensuring reliable, adaptive, and encrypted data exchange in real-time, it enhances mission success and decision-making efficiency. The study positions it as a future-ready solution for tactical operations.
- Research Article
- 10.5937/str2500001k
- Jan 1, 2025
- Scientific Technical Review
- Mirjana Krstović + 5 more
Monitoring the chemical stability of gunpowder and double-base rocket propellants is a crucial aspect of quality control for stored ammunition. This intricate undertaking seeks to guarantee the accuracy of ammunition at a satisfactory level, encompassing both its practical functionality and safety considerations. The primary reason for monitoring chemical stability is the presence of nitrocellulose (NC) as the basic energetic component in gunpowder and double-base rocket propellants. This particular form of ammunition, known as NC ammo, undergoes a slow process of degradation over time. It is important to note that even when exposed to normal environmental conditions, it has the potential to ignite spontaneously. This reaction is inherently spontaneous and irreversible, however, it can be slowed down by introducing a small quantity of organic or inorganic substances known as stabilizers. Over time, the stabilizer is gradually consumed, and accurately measuring its quantity is essential for evaluating chemical stability. Aside from stabilizers, additional organic additives are used in nitrocellulose-base energetic materials to enhance performance or streamline the production process. Identification and quantification of organic components are also important from the aspect of analyzing unknown samples. The high-performance liquid chromatography (HPLC) method can be used to determine the content of certain organic compounds. The sample preparation for quantifying the organic compound content relies on the specific type of energetic material being examined, following the standard protocols outlined in the HPLC method. The technique of sample preparation, the equipment needed in the laboratory, and the amount of time required to get accurate and repeatable results are all directly impacted by the solvent selection. This research provides a comparison of sample preparation performances using two different solvents (dichloromethane and acetonitrile) indicating the advantages and disadvantages of both preparation techniques.
- Research Article
- 10.5937/oteh2402009f
- Jan 1, 2024
- Scientific Technical Review
- Abdellah Ferfouri + 4 more
A computational analysis was carried out in order to study the effect of solid rocket motor operating parameters on the trajectory elements of 155mm rocket-assisted projectile. Two numericalsolutions have been programmed for this purpose. The first for the rocket motor internal ballistic calculation. The second is intended for the six degree-of-freedom (6-DOF) trajectory determination for both unpowered and powered flight. The effect of three operating parameters of the solid rocket motor on the trajectory elements was taken into account, namely: (1) thrust-time profile (neutral, regressive or progressive), (2) working time and (3) ignition delay. The results obtained following this analysis are helpful as a preliminary stage in the design of extended range projectiles in order to optimize flight performance.
- Research Article
- 10.5937/oteh2402038j
- Jan 1, 2024
- Scientific Technical Review
- Nebojša Jovičić + 3 more
This paper explores the design and implementation of a servo mechanism utilizing DC electromotors for control of missile fin position. This research is focused on the analysis and optimization of DC electromotors to enhance the performance of servo systems in terms of speed, torque, accuracy and efficiency. Combination of theoretical approaches and experimental test were performed to validate the proposed mechanical construction of a servo mechanism.
- Research Article
- 10.5937/oteh2402071s
- Jan 1, 2024
- Scientific Technical Review
- Aleksandar Savić + 2 more
The Military Technical Institute (MTI) is the largest military scientific and research institution in the Republic of Serbia. It mainly realizes its supply chain from the approved budget funds of the Republic of Serbia, while a smaller part is realized from its own revenues. Her continuous work to improve non-financial performance within the supply chain as well as motivate employees to manage their supply chain integration (SCI) initiatives requires intellectual capital (IC) tracking and reporting. Analysis and reporting on IC in MTI can be done within the human, organizational and social dimensions of IC. This paper will examine the role of IC reporting and examine its impact on SCI in MTI. The aim of the paper is to determine that the monitoring and reporting of IC affects the process of SCI in MTI.
- Research Article
- 10.5937/str2401003v
- Jan 1, 2024
- Scientific Technical Review
- Maja Vitorović-Todorović + 1 more
Despite international prohibition of chemical warfare agents (CWAs), defined in Chemical Weapons Convention, recent events during military conflict in Syria and isolated events in Salisbury (UK) and Kuala Lumpur (Malesya) airport prove that these agents still pose a major threat for civil society. In parallel with the development of CWAs and systems for their dissemination, various materials and accompanying technologies for their neutralization and decontamination were developed. However, to this date, no universal decontamination agent and technology has been developed that meets all quality requirements. In this article, we briefly reviewed all commercially available decontamination products, discussed their effectiveness in various scenarios, and considered their potential comparative advantages and drawbacks. Along with this, we reviewed novel materials and technologies, from common oxidizing and hydrolysing chemicals to metal-organic frameworks and nanotechnologies that show potential for the industrial development.
- Research Article
- 10.5937/oteh2402023t
- Jan 1, 2024
- Scientific Technical Review
- Vuk Todorović + 2 more
The representation of a robot's configuration can be diverse, each with its advantages and disadvantages. In this paper, we approach the problem using screw theory, which states that all rigid-body motion can be represented with a rotation and translation along a screw axis. Using this as a basis, we'll be tackling the inverse kinematic problem of robots, which lacks standardized ways of being determined, unlike the forward kinematics problem. With that in mind, here we will show a combined approach of the analytic and numerical way of solving the inverse kinematic problem on a Niryo One robotic manipulator. The analytic solution is derived by simplifying the robot's structure and then using those results as initial guesses for the Newton-Raphson numerical method which may produce up to 8 possible solutions. The theoretical foundation is then implemented using the Python programming language after which the solution is sent to the robot via a Niryo One ROS API - pyniryo.
- Research Article
- 10.5937/str2401036k
- Jan 1, 2024
- Scientific Technical Review
- Mirjana Krstović + 4 more
Metal powders have been utilized for a long time in energetic materials to improve some specific performance. In recent years, metal particles in energetic materials have been reduced in size since smaller particles, particularly nano-sized, have highly beneficial qualities. These positive aspects are evident in the reduction of ignition and combustion times, resulting in enhanced combustion in volume-constrained systems, improved heat transmission, and increased total thermal energy release. Aluminum is one of the first metals to be used in form of nano-particles in energetic formulations, with its concentration ranging from a few percent to up to a third of the total composition. In this paper, the effect of applying nano-scale aluminum on the energetic characteristics of explosives, pyrotechnic mixtures, and rocket propellants is observed. The differences in the energetic potential due to varying sizes of aluminum particles (micrometer and nanometer sizes) are shown. For selected energetic materials, the energetic potential during combustion in an inert atmosphere was determined using the method of isoperibolic calorimetry. The theoretical values of the energetic potential for the selected compositions were determined using the thermo-chemical computer code EXPLO5. Numerical modeling using the software package may anticipate the behavior of energetic materials quickly, cost-effectively, and in an environment-friendly manner. Furthermore, the combustion efficiency of the chosen compositions can be assessed by comparing the theoretical and experimental values.
- Research Article
- 10.5937/oteh2402065a
- Jan 1, 2024
- Scientific Technical Review
- Vuk Antonić + 3 more
Small fixed-wing unmanned aerial vehicles (UAVs) have proven themselves as invaluable assets for reconnaissance and surveillance missions. Their improvement and further development most often focuses on improved endurance, datalink range, camera capabilities etc. This paper presents a modular approach to "Vrabac" UAV improvement by integrating wing payload extensions, enabling precision aerial drop capabilities. This enables precise delivery of lethal or non-lethal payloads from the UAV at pre-determined coordinates or at a visually aquired target. Precision aerial drop software module is presented, focusing on the automated payload drop algorithm with continually calculated impact point prediction (CCIP) and UAV guidance to the continually calculated release point (CCRP). The chosen ballistics computation and control system implementation evaluates UAV flight parameters, wind direction and velocity, terrain profile etc. to achive a precise target strike. Simulated results with a parameter sensitivity analysis, as well as field test results are presented.
- Research Article
- 10.5937/str2401011r
- Jan 1, 2024
- Scientific Technical Review
- Luka Radulović + 3 more
In this paper, an optimization method for a rocket-refurbishing project is presented. While considering the technical solution the level of reconstruction needs to be decided, from which refurbishment costs are dependent, as well as eventual increase of rocket performances. The idea of rocket motor refurbishment is to extend the life cycle and eventually increase performances for a minimum of an investment. The design shown in this paper is supposed to be an economic solution for the M63 "PLAMEN" 128 mm caliber artillery rocket, resulting in the increase in performance, without significant changes to the construction.