UDC 004.588 BBK 74.5

Chokoj V. Z.

The article presents the author’s packet of tool skins for an ECM enabling to simulate technological processes in air transport systems during aircraft maintenance. The tool skins implement mathematical models as a base for different Markov processes.

The presented tools of mathematical modeling are supposed to be useful along with the educational process for operating organizations which are interested in the issues of optimization and management of technological processes.

Key words: mathematical model, air transport system, Markov processes, Markov sequences, Markov chains, reproduction and death processes, mean-value dynamics method.

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UDC 004.588 BBK 74.5

Chokoj V. Z.

The author considers ECM tools enabling to solve the problems of optimizing the structure and operating modes of civil air transport systems. The tools are mathematically rested on the apparatus of the waiting theory. The tools functionality provides modeling the multi-channel and  separated,  opened and completed waiting systems, waiting systems without queues or with the various queuing disciplines, waiting systems with different sources and characteristics of service requests. 

The tools for multi-aspect modeling of waiting systems are supposed to find application not only in the educational process, but also in the real experience of civil air transport systems.  

Key words: air transport system, waiting theory, request flow, request servicing mode, waiting system

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UDC 004.588 BBK 74.5

Chokoj V. Z.

The article presents the mathematical approach to simulating the operation processes of complex organizational and technical systems (such as aviation enterprises) as well as the review of functional capabilities and main interface solutions on the simulating tools package. The tools enable to expand the range of problems to be solved for analysis and optimization of waiting systems typical for aviation enterprises.

The simulating tools are supposed to find application not only in the educational process, but also in the real experience of operation and research organizations of civil aviation. 

Key words: air transport system, simulating, random number generator, generation of flows with the desired distribution law, waiting system.

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UDC 629.118 BBK 39.0

Martin Vlkovský, Kateřina Pochobradská, Pavel Foltin

The paper deals with cargo security in regards to specific (off-)road conditions and normative assumption. The importance to know real size of inertial forces for the securing cargo is discussed. On an illustrative example, based on relevant technical standards, the possible deviations of real size of the inertial force (acceleration coefficients) with presumed are compared.

Key words: off-road transport; material handling, cargo security; inertial forces; acceleration coefficients

Martin Vlkovský, Kateřina Pochobradská, Pavel Foltin

Brno, Česká republika

PŘEPRAVA V TERÉNU A ZAJIŠTĚNÍ NÁKLADU 

Článek se zabývá zajištěním nákladu v souvislosti se specifickými podmínkami při silniční přepravě (i mimo komunikace) a předpoklady uvedenými v technických normách. Rozebírá význam znalosti setrvačných sil pro volbu fixačního prostředku a způsobu upevnění. Na ilustrativním příkladu jsou porovnány možné odchylky skutečných hodnot setrvačných sil (koeficientů zrychlení) s předpokládanými, které vychází z příslušných norem.

Klíčová slova: terénní přeprava; manipulace s materiálem; zajištění nákladu; setrvačné síly; koeficienty zrychlení.

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UDC 338.45 BBK 65.9.050

Chokoj V. Z.

Currently, some Russian airlines face certain difficulties both in economics and in flight safety. This is caused by, among other things, insufficient operating reliability of aviation equipment and certain problems in issues of aircraft diagnostics. First of all this concerns the well-timed correct technical diagnosis of aircraft with short residual life as well as new types of aircraft for which airlines don’t have enough maintenance experience.

The article considers computer tools which enable to make decisions on the current technical condition of aircraft equipment taking into account actual conditions and technical policy of the airlines. The mathematical apparatus of the proposed tools is based on the sequential Wald-type analysis, Bayesian treatment, criteria of statistic decisions.

Key words: reliability, technical diagnosis, aviation equipment, sequential analysis, Bayesian treatment, statistic decisions.

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UDC 338.45 BBK 65.9.050

Chokoj V. Z.

Economic difficulties in air transportation in Russia over the recent years as well as particular problems of flight safety require exploring and actuating latent reserves of efficiency. One of the reserves can be real control of operation reliability of aircraft and ground-based elements of air transport systems. The control proposes solving the problems one of which is correct software formation for reliability multiple-aspect estimate with incomplete censored data. The estimate involves a certain problem especially for the staff having insufficient mathematical and computer training. The article announces the packet of tool skins for non-parametric estimate of reliability by means of ECM.

Key words: reliability, reliability indices, aircraft equipment, non-parametric estimate, censored data

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