Vojnotehnicki glasnik / Military Technical Courier

557-566

Authors: Andrič Andreja, Ostojić Nedeljko, Grandić Janko

In this paper we present an intelligent educational software system developed for training in positioning of military combat units on the tactical level. It is intended for use by the teachers and students of the Military Academy in Belgrade. It offers to a student a possibility to draw tactical signs on a scanned topographic map, according to a previously obtained assignment. The system is equipped with an analysis tool which can detect student's mistakes warn him, propose corrections, and stimulate him to seek for better solutions. It also offers to a teacher a possibility to design assignments which include the placement of enemy units, obstacles, mine-fields, etc. We are also presenting here some experience gained in knowledge acquisition design and evaluation of this software system.

589-597

Authors: Janićijević Slobodan

The most important and utmost per dimension unit of the inertial navigation sistem (INS) is the inertial measurement unit (IMU). This paper analyzes reliabilitu of five possible IMU architectures from the point of view of particular system components reliability (sensor-gyro and accelerometer processor, internal and external data bus, power supply, clock function and programmable counters), their individual contribution to of reliability decreasing IMU and implementation redundancy of this system components in order to increase IMU reliability.

612-622

Authors: Pantić Toplica

This paper deals with a possibility to apply the mass servicing theory in the servicing of supersonic aircraft squadron in dispersed formation. The research has been conducted with the purpose of checking whether fullers designed for refueling a fighter-bomber aircraft squadron can satisfy the requirements of a supersonic aircraft squadron. The purpose of the paper is a mathematical modeling which can be used to estimate efficiency of mass servicing system functioning applied to supersonic aircraft squadron servicing.

631-641

Authors: Galić Pavle

This work has reviewed the basic concepts of the scientific research in the field of road traffic safety which has been one of the newest scientific areas. The research in this field is of great importance because the safety of all kinds of transport, particularly of the road traffic, has become a thing of great concern of each country and each society. As it is obvious that mankind has already suffered many losses due to the consequences of traffic accidents, safety appears as a very serious social problem. Thus the aim of each country should be to improve the traffic safety and to achieve a certain standard of methods of traffic having had the least possible number of accidents. This problem can be solved having taken in account the complete knowledge of all risks and causes that may lead to accidents, as well as applying thoroughly all systematically prepared measurements based on scientific achievements.

397-411

Authors: Kokanović Milun

(not available in English) Tehničko-tehnološki razvoj u naučno i ekonomski moćnim zemljama sveta poslednjih decenija najvećim delom je potenciran i iskorišćen za proizvodnju oružja i sredstava naoružanja i vojne opreme. Time je radikalno izmenjena osnova rata, tako da se sa nuklearne, strategijske koncepcije prelazi na informatičku koncepciju rata. Tehnička služba Vojske Jugoslavije (Tehnička služba KoV, Vazduhoplovno-tehnička služba i Mornaričko-tehnička služba) shodno izmenjenim uslovima, pratila je i izučavala razvoj tehničko-tehnološkog faktora u svetu i njegov uticaj na oružanu borbu. Kadrovskim osposobljavanjem, racionalnom organizacijom sistema tehničkog obezbeđenja i materijalnom podrškom, uspešno je podržavala potrebe Vojske Jugoslavije u razvoju tehničkih sredstava naoružanja i vojne opreme njihovom snabdevanju i održavanju u čitavom životnom veku.

423-429

Authors: Babić Radoslav

(not available in English) Kao jedinica Vojske Jugoslavije (VJ) Pozadinska baza (PoB) je specifična po nameni, zadacima, svojoj organizacijsko-formacijskoj strukturi i mestu i ulozi u sistemu logističke podrške VJ. Oče-kuje se da će se reorganizacija ove jedinice na logističkom principu organizevanja izvršiti u narednom periodu, pa se još uvek koristi termin pozadinska baza i pozadinsko obezbeđenje uporedo sa terminom logistička podrška (LoP). Uspešnim izvršavanjem funkcionalnih zadataka ove jedinice u značajnoj meri obezbeđuje se i izvršavanje zadataka VJ u celini

453-459

Authors: Milinović Momčilo

The article does not contain abstract.

472-483

Authors: Jovanović Dragutin

(not available in English) Izvršavanje složenih zadataka saobraćajne podrške zahteva postojanje visokostručnog kadra Saobraćajne službe odgovarajućeg profila. Školovanje kadra obezbeđuje se realizacijom savremenih nastavnih planova i programa kvalitetnim nastavničkim kadrom i primerenom nastavno-materijalnom bazom. Koncept školovanja, profil oficira i nastavni planovi i program! za vremena koja dolaze moraju se prilagođavati potrebama prihvatanja logističkih principa u vojnoj saobraćajno-transportnoj organizaciji. Radi toga se nastavni planovi i programi za naredni period inoviraju u skladu sa zahtevima visoke tehnologije.

493-502

Authors: Stevanović Slobodan

(not available in English) Održavanje tehničkih materijalnih sredstava (TMS) organizovana je delatnost komandi, jedinica i organa Tehničke službe, kao stručnih nosilaca poslova planskog korišćenja raspoloživih kapaciteta i primene propisanih mera i postupaka. Da bi se obezbedio odgovarajući stepen ispravnosti i pouzdanosti TMS, ovaj sistem može ostvariti cilj samo ako su mu raspoloživi ljudski potencijali, pored ostalih i vojnička stručna radna snaga, obučeni za izvršenje zadataka tehničkog održavanja. Zavisno od intenziteta vojne obuke i sve složenijih zahteva u pogledu pripremanja pripadnika vojske za ratovanje u savremenim uslovima, u mnogim armijama se preduzimaju značajne mere za iz-nalaženje najracionalnijih oblika organizacije obuke. Od mnogih rešenja vremenom su se izdvojila tri sistema osnovne obuke: u matičnim jedinicama, u nastavnim centrima i njihova kombinacija. Različiti oblici organizovanja obuke vojničkog sastava u prethodnim periodima, i bogata iskustva Tehničke službe, doprineli su i sadašnjem organizevanju obuke različitih specijalnosti, što predstavlja optimalno rešenje u kome su sadržana i saznanja o organizaciji obučavanja srodnih specijalnosti i u oružanim snagama stranih zemalja.

513-520

Authors: Savčić Srećko

The article does not contain abstract.

529-535

Authors: Jovanović Milorad

The article does not contain abstract.

263-272

Authors: Korolija Dušan

Increased demands for low cost of hardware, small size and low power consumption of equipment in cellular mobile communications have driven designers to resurrect the direct conversion receiver. Long abandoned in favor of the mature superheterodine receiver, the direct conversion receiver has emerged over the last decade. Direct conversion reception has several qualities which makes it very suitable for integration as well as multi-band multi-standard operation. This paper describes the characteristics of the direct conversion receiver as well as the inherent imperfections of the superheterodine receiver from the aspect of integration.

280-287

Authors: Tot Lajoš

These investigations included experimental and theoretical study of acetone vapours influence on the propellant mechanical properties. The tests were carried out on two defined propellants. Herein shown are the results of the mechanical tests of both non-treated and treated propellants as well as an attempt to explain the observed phenomenon.

300-308

Authors: Demić Miroslav

Steering wheels vibrations around king pins, known as "shimmy", produce a harmful influence on motor vehicle steering parameters. They appear to be a result of the influence of road irregularities, clearance in the steering system, wheels unbalance, wheels and tires nonuniformity, etc. In a vehicle steering system design process, an optimal choice of vehicle parameters is of major importance for minimum values of wheels shimmy. This paper presents an attempt to model a truck steering system with power and mechanical steering so as to study steering wheels shimmy.

320-330

Authors: Cvijović Milanko

The study analyzes the forces affecting a parachuting system at the moment of its opening at different heights and flight velocities. The strain peak occurs at the moment when the filling of the parachute cupola with air is to be finished. Therefore, a special attention during calculations is paid to the cupola and the elements connecting it with the rest of the parachuting system. The study presents the calculation methodology for a parachuting system without a brake-parachute and for systems with one or more brake-parachutes.

145-154

Authors: Galović Danijela

The problem of inventory control of spare parts in a hierarchical two-level system in uncertain environment is considered. The hierarchical two-level system consists of one central depot and N branch warehouses. A demand of each kind of treated spare parts is uncertain and modeled by fuzzy numbers. A new procedure of classification according to the fuzzy ABC method is developed. The control models are determined for spare parts of great importance. A new fuzzy mathematical model for determining the optimum order quantities of the central depot and branch warehouses is presented. The values of unit procurement price, unit holding costs and unit shortage costs are deterministic. The developed procedure for the classification and the algorithm for determining the optimum order quantities is illustrated by an example.

166-175

Authors: Medan Branko, Đorđević Momčilo, Veselinovič Dejan

The technical support service in the Army has a great importance within the frames of combat service support. By the application of information technology in the planning of work of the Technical support service and by controlling the plan realization, the following is ensured: the most rational utilization of available resources, the balanced employment of staff elements and personnel within the frames of combat service and the most efficient realization of plans. This program is applied for observing the realization of the maintenance process in a technical company and it is apart of the logistic information system.

184-194

Authors: Građin Zoran

Ecological trends and movements in the modern world grow stronger and more active, due to a real danger of Earth pollution. One of the main sources of pollution are 1C engines and their influence on environment is significant. However, conventional combustion engines still are and will be dominant powering systems for numerous future applications. Two solutions are possible answers to this problem: first, the replacement of conventional fuels by alternative ones and second, modifications on the 1C engine design in order to decrease fuel emission and consumption. One of the solutions for the improvement of 1C engine design is the modification of engine parts or their design, with great influence on the decrease of mechanical losses, especially on partial rating. Therefore, it is important to say that complex problems of engine (automotive) decrease of fuel consumption and exhaust gas emission can be solved only by simultaneous development of oil and engine (automotive) industry

202-207

Authors: Anđelković-Lukić Mirjana

The paper deals with production processes of manufacturing and coating Ugh explosives which pollute environment with waste waters. Some methods of refining waste waters before letting them into open water current are presented.

14-27

Authors: Erić Miljko M., Dukić Miroslav L., Pokrajac Ivan

The MUSIC based Direction of Arrival estimation using the ADCOCK antenna arrays is considered. Starting from signal model formulation, the cost function of the MUSIC algorithm and the ambiguity functions for the ADCOCK antenna array have been formulated. Some simulation results and some preliminary results of the verification in practice are presented.

36-41

Authors: Stojanović Miroslav, Bulajić Đuro, Rakić Vladimir

We presented the results of the realization of the logistic information system. While fulfilling this task we connected computers physically and succored logical functioning of the system on three levels (command management and execution level). We designed software, using modern software development tools and worked on the education of professional military officials for PC using and basic maintenance of computer equipment.

50-60

Authors: Živković Dejan, Basarić Gradimir, Jovelić Stojan

The aim of the work was to measure the whole body vibration on helicopter pilot seats in two types of helicopters with jet engines and to accomplish the third octave analysis of whole body vibration acceleration in all three axes. The results of measurement on the first type of helicopters showed that the highest acceleration levels were in third octave band with the mid frequency of 16 Hz. The highest whole body vibration acceleration values were for the following regimes: the regime of levitation and the regime of horizontal flight with a speed of 250 km/h. The permissible exposure time periods for these acceleration levels were around 5 hours. The results of measurement on the second type of helicopters showed that the highest acceleration levels were in the third octave band with the mid frequency of 6,3 Hz. The highest whole body vibration acceleration values were for the following regimes: the regime of turning point and the regime of horizontal flight with a speed of 200 km/h. The permissible exposure time periods for these acceleration levels were around 3 hours. The acceleration levels in X or Y axes for both types of helicopters, in all regimes and all third octave bands, were very far below from the exposure levels for 24 hours. Since the pilots 'continuous exposure in the investigated regimes of flights is below these mentioned time periods, we can conclude that the whole body vibration levels do not have significant effects on the pilots' working ability.

73-81

Authors: Borisov Mirko

The article deals with the analysis of deformations of geographic map contents and the procedure of eliminating deformations. Geographic maps are used for visualizing and studying geospatial data and for identifying metric features. For that reason the accuracy analyses are very important as well as the elimination of all possible deformations of the maps.

90-100

Authors: Pokorni Slavko

The article does not contain abstract.