Vojnotehnicki glasnik / Military Technical Courier

5-31

Authors: Bakić Selena P., Paligorić Anastas L.

For more than a century researchers in many countries have been engaged in research and development of electromagnetic (EM) guns in order to launch projectiles with very high speed. In published sources many papers are related to theoretical considerations of certain phenomena of electrically driven projectiles and hardware solutions for electrical devices and components required for projectile launching. The works related to the philosophy of combat use, the concept of solutions and possibilities of application of such weapon systems are, however, less available to the public. The intention of the authors of this paper is to point out the basic problems of designing such weapon systems, and to give the readers the information on the basis of which they can assess whether it is possible, when and on what kind of platform for the EM gun to be approved for the operational use.

47-64

Authors: Tadić Marin M., Čitaković Nada M.

In this work the results of an investigation on hematite (α-Fe2O3) nanoparticles magnetic properties, which show superparamagnetic behavior i. e. superparamagnetism, have been presented. Hematite nanoparticles behavior and nanoparticles size influence on magnetic properties have been presented. Hematite nanoparticles properties have been compared with a high cristallinity hematite sample.

78-87

Authors: Terzić Miroslav R.

One approach to the evaluation of the effectiveness of a system for acoustic source localization and identification has been shown in this article. The system for acoustic source localization and identification has been presented as a model of mass servicing system. The states of the system as well as its features have been described while the formula for service probability determination has been derived as a criterion for effectiveness evaluation. The introductory part of the article describes the system for acoustic source localization and identification and shows a model for quantity estimation of the function of technical system effectiveness E (t). The system effectiveness represents a probability of system initiation as well as a probability of its successful mission accomplishment on the basis of designed capabilities within the given time period and operational conditions. The basic characteristics of the Boomerang system for acoustic source localization and identification show the system elements and its designed capability to detect, analyse and distribute acoustic source location data. The analytical model for the evaluation of the effectiveness of the Boomerang system for acoustic source localization and identification shows that 'n' stations for acoustic source localization can exchange information with each other using the network link. The system conditions are described and the expression for the determination of service probability as a criterion for system effectiveness evaluation is derived. The evaluation of the effectiveness of the Boomerang system for acoustic source localization and identification is presented with a formula for determining mass servicing system probability from the Matlab 6.5R13 program. The following graphs have been obtained: - correlation between mass servicing probability and processing acoustic signal intensity for m=1,2,3,i; - correlation between mass servicing probability and the number of stations for acoustic source localization and identification. The obtained graphs help in the optimization of the system for acoustic source localization and identification. The conclusion gives some guidelines in applying this analysis and achieving optimal resources employment in combat environment.

105-124

Authors: Trifković Dragan R., Obradović Aleksandar M.

The procedure of replacing the elements of a complex torsional vibration system of ship diesel engine propulsion with simplified equivalent ones with the same dynamic characteristics is shown in this work. The given procedure comprises the methods for the determination of equivalent lengths, stifnesses and moments of inertia based on the equality between kinetic and potential energy of real and equivalent elements of the system. Additionally, the exciting moments which excite forced torsional vibrations of the considered system are analysed.

146-161

Authors: Karović Samed M., Komazec Nenad M.

Building of the Integrated Management System (IMS) represents a necessity, because it incorporates the existing management systems of an organization according to the ISO standards (The International Organization for Standardization), whose aim is to satisfy managerial and organizational practical work.. The conditions are thus established and the key elements in the field of quality, ecology, security, economy, reliability, compatibility, efficacity and effectiveness are provided.