AiMT Volume 5 (2010), Issue 1

Structural Reliability of Interactive Cable Television

D. Trstensky, L. Schwartz and V. Hottmar

Television cabling distributions have hitherto been constructed by coaxial cables. Their transmission capacity has not been sufficiently utilized. They have transmitted only television channels. Considerable efforts have been made to utilize their bandwidth more effectively for the transmission of not only television channels but also voice, Internet and various interactive supplementary services. New conception presupposes the use of fibre optics. Important characteristic feature of this conception is its reliability.

Keywords: Interactive cable television (ICATV), end user box (EUB), set-top-box (STB), cable modem (CM), hybrid fibre coax (HFC), middle time between failures (MTBF), data over cable service interface specification (DOCSIS), voice over IP (VoIP), quality of service (QoS).

Pages: 5-12

Gun Pyrocartridge Unauthorized Ignitions

Z. Růžička

During practical tests of a recently developed double-barrel fighter gun, some unauthorized ignitions of electrically activated pyrocartridges have occurred. After avoiding a malfunction of the gun electrical equipment, an influence of mechanical processes has been analyzed showing a possibility to cause the unwelcome phenomenon.

Keywords: Pyrocartridge, pyrocontact, cap, ignition energy, temperature boost

Pages: 13-21

The Property Comparison of Electromechanical and Electro-hydraulic Flight Control Actuators

F. Adamčík, J. Labun and J. Piľa

The paper is focused on the problems of modelling and simulation of aircraft electromechanical and electro-hydraulic actuators. The obtained results are used in a teaching process of this issue using their interactive displays for different activity modes.

Keywords: Flight control actuator, modelling, simulation

Pages: 23-30

Multi Sensor Data Processing Using Single Chip Microprocessor

M. Dub and R. Jalovecký

The paper deals with one possible solution of event rules programming in the field of data processing from different sensors. Block diagram of used event rules programming is introduced. The commercial door motion control system based on data processing from several sensors was developed. Signals from encoder, inductive proximity sensor, passive infrared motion sensor module, fire sensor and DC power system failure sensor are processed. The system control element is simple ADuC812 microcontroller. Particular electric diagram of eight-channel parallel input is described.

Keywords: Event rules programming, sensors, microprocessor ADuC8xx, motion control, PISO register

Pages: 31-37

TECHNICAL INFORMATION
Application of REACH-BACK Concept for Assessment of Wood Structure on KFOR Šajkovac Base

M. Benda

The main topic of the paper is to present using the Reach-Back concept during operation called "STODOLA". This operation included assessment of temporary wood structure on KFOR base Šajkovac. The operation included also project of reinforcement of construction. There was cooperation between expert team of Department of Engineer Technologies and staff officer on base Šajkovac in Kosovo.

Keywords: Reach-Back, engineer, temporary construction, wood structure

Pages: 41-47

TECHNICAL INFORMATION
Possibilities of Analytical Signal Usage in Numerical Demodulator MSK

M. Siska and I. Hlaváčková

The article deals with applications of a DSP (Digital Signal Processor) in the MSK (FSK) demodulators. It describes simplified method of numerical processing of analytical signal. By simulation procedures it features achieved results and show possible applications.

Keywords: Engineer, engineer support, combat support engineering, close support engineering, force support engineering

Pages: 49-54

TECHNICAL INFORMATION
Blast Protection of the Perimeter

P. Beyr

The article brings a different approach to the perimeter protection in comparison with current manuals. It explains the reaction of the fortification materials when high explosive detonates on of their surface. Fortification is assessed here as concrete or loose material. Based on acoustic rules it is a process of attenuation of transition waves while propagating the above mentioned materials. The article shows the false feeling of the security of persons standing behind concrete wall and vice versa the underestimating of the loose material efficiency. Further recommendations how to improve blast protection of perimeter walls are given on the conclusion of this article.

Keywords: Berm, blast protection, concrete wall, explosives, perimeter security

Pages: 55-62