AiMT Volume 1 (2006), Issue 1

NONCOMMUTATIVE JOIN SPACES OF INTEGRAL OPERATORS AND RELATED HYPERSTRUCTURES

Šárka HOŠKOVÁ, Jan CHVALINA, Pavlína RAČKOVÁ

In this contribution we construct noncommutative transposition hypergroups of integral operators on spaces of continuous functions which are determined by Fredholm integral equations of the first and second kinds. We started with integral operators formed by separated kernel. Moreover, we investigate the obtained hyperstructures as transposition hypergroups and also related quasi-hypergroups of blocks of equivalence of integral operators. Moreover, we use also the object function (where the corresponding binary hyperoperation on an ordered group is defined as principal end generated by products of pairs of elements of the considered group) of a functor enabling the transfer from the category of ordered groups and their isotone homomorphisms into the category of hypergroups and their inclusion homomorphisms.

The basic group of integral operators contains an invariant subgroup. Using another binary operation on the set of suitable Fredholm integral operators of the second kind we get a group with a significant non-invariant subgroup of operators of the first kind enabling the construction of a quasi-hypergroup of decomposition classes of operators, structure of which is also clarified.

The article is a basic analytic material dealing with problems of military techniques maintenance. It analyses current state and assumed development of maintenance of combat, special and transport vehicles, and airplanes in particular NATO countries.

Page: 7 to 24

CIVILIAN APPLICATION OF LIQUID PROPELLANT ROCKET MOTOR PRINCIPLE

František LUDVÍK

The paper deals with application of liquid propellant rocket motor possibilities for civilian exploitation as e.g. for the solution of steam gas for the steam turbines drive. These questions are in the time being very important mainly with respect to the so called clean energy sources.

One of several possibilities how to get such "clean energy system" source is the utilisation of convenient fuels and oxidisers combustion inside the gas generator combustion chamber, the majority of which are in gaseous state and designed at the base of liquid propellant rocket motor.

Page: 25 to 32

LIGHT ANTITANK WEAPON WITH DOUBLE REGIME PROPULSION SYSTEM

František LUDVÍK

The paper deals with the solution of light antitank weapon when its principle is deduced from the principle of the "dual regime" rocket motor with solid propellant charge. The chosen principle of light antitank weapon has some advantages and also some disadvantages. The paper is oriented mainly on positive features of this solution.

The paper by its content logically follows the paper having the title "Light Antitank Weapons".

Page: 33 to 47

VIRTUAL ENGINE - A TOOL FOR MILITARY TRUCK RELIABILITY INCREASE

Pavel NOVOTNÝ, Václav PÍŠTĚK, Jiří STODOLA

The internal combustion engine development process requires CAE models which yield results for the concept phase at a very early stage and which can be further detailed on the same program platform as the development process progresses. The vibratory and acoustic behavior of the powertrain is highly complex, consisting of many components that are subject to loads that vary greatly in magnitude and which operate at a wide range of speeds. The interaction of the crank and crankcase is a major problem that powertrain designers have to face when optimizing the vibration and noise characteristics of the powertrain. The Finite Element Method (FEM) and Multi-Body Systems (MBS) are suitable for the creation of 3-D calculation models. Non-contact measurements enable complex calculation models to be verified. All numerical simulations and measurements are performed on an in-line six-cylinder diesel engine.

Page: 49 to 69

ROCKET MOTOR WITH TUBULAR SOLID PROPELLANT CHARGE AND PROFILED OUTER SURFACE

Pavel KONEČNÝ

The paper introduces the procedure of main solid propellant charge dimensions having the tubular geometric shape with grooves at the outer surface. Main attention is paid to the general description of solid propellant rocket motor modification with the mentioned solid propellant charge.

Page: 71 to 82

THE PULSE GROUP DEINTERLEAVING

Jiří VESELÝ, Petr HUBÁČEK

This article is focused on the process of radar signal sorting and identification by passive systems. The unambiguous signal source identification and classification is possible only on condition of the right signal source deinterleaving. The deinterleaving based on the knowledge of signal source position is complicated for constant PRI (Pulse Repetition Interval) pulse group signals.

This paper describes the deinterlaving problem solving of the constant PRI pulse group signals by statistical sorting method. The example of the signal source deinterleaving on short time irradiation conditions with false pulses is included.

Page: 83 to 90

ANALYSIS OF THE 155 MM ERFB/BB PROJECTILE TRAJECTORY

Rastislav BALON, Jan KOMENDA

The article is focused on the external-ballistic analysis of the 155 mm artillery High-Explosive Extended-Range Full-Bore projectile with the Base Burn Unit (ERFB/BB), designed for the Slovak 155 mm Self-Propelled Gun Howitzer ZUZANA. The external-ballistic analysis of the characteristics of the 155 mm ERFB/BB shell is made for the Modified Point Mass Trajectory Model with additional terms for the Base Burn projectiles - Method 1 (MPMM+BB1) which is standardized in the STANAG 4355 agreement. The aim of this analysis is to determine all required data for the trajectory model mentioned above, specifically dimensional and mass properties, aerodynamic data, ballistic data and also the Base Burn Unit data. The results of the theoretical analysis are compared with the results of experimental firing tests.

Page: 91 to 114

ANALYSIS OF POSSIBILITIES OF MISUSE OF THE WEAPON SYSTEM CZ 83 PA RUBBER

Jan KOMENDA, Luděk JEDLIČKA, Miroslav NOVÁK, Ivan SEDLÁK, Hana KONEČNÁ, Ludvík JUŘÍČEK

The article deals with possibilities of misuse of the non-lethal weapon system CZ 83 PA Rubber (product of CZ Uhersky Brod) for firing standard ball ammunition with metal projectile that is not intended for this type of weapon. The evaluated weapon system consists of modified semiautomatic pistol CZ 83 and non-lethal cartridges of calibre of 9 mm PA Rubber with a rubber spherical projectile. The results of theoretical analysis and also the results of practical firing tests that are unique from internal ballistic point of view are shown in the article.

Page: 115 to 135

TECHNICAL INFORMATION
ARTIFICIAL INTELLIGENCE TECHNOLOGY ON BOARD OF AIRCRAFT

František ADAMČÍK

The part of the board aircraft equipment contains the great amount of complex subsystems which are mutually connected and controlled by the airplane crew. So a pilot works in such conditions when he must receive and work out a lot of information/data from more panel and outer sources. This information is later used to control the airplane and to fulfill the flight missions. The development in the sphere of solving the described problems leads to the usage of elements and methods of artificial intelligence. One of possible approaches is an application of panel expert systems.

Page: 137 to 142