• Gapanovich V.A., Zamyshljaev A.M., Shubinsky I.B.
  SOME ISSUES OF ASSET AND RISK MANAGEMENT ON A RAILWAY TRANSPORT ON THE BASIS OF OPERATIONAL RELIABILITY CONDITIONS, SAFETY OF OBJECTS AND PROCESSES
  (PROJECT URRAN)

The article considers harmonization issues of normative base of Public corporation "RZD" with the international standards for railway applications EN 50126 and IEC 62278 using methodology RAMS (complex management of reliability, availability, maintainability and safety). For the purpose of operational activity management optimization of the Corporation the URRAN project is being realized and intended for development of RAMS methodology on the basis of parameters developed in this project on operational reliability and safety of objects and processes, information technologies and of some propositions on optimization of life cycle cost of railway transport objects. The example illustrating efficiency of developed parameters applications for activity management of linear operations is resulted.
Keywords: Dependability, safety, reliability (non-failure operation), availability, maintainability, life cycle, risk, asset, operation, harmonization, standards.

• Ankoudinov I.G.
  MULTICRITERIA EVALUATION OF HIERARCHIC SYSTEMS BASED ON THE WEIGHTED POWER MEAN

An approach to the construction of a hierarchic system of indicators and integral criterion for multicriteria evaluation of the quality and effectiveness of complex technical and other systems based on the weighted power mean (WPM), using decomposition as well as aggregation of indicators, is offered. The convolution function in the form of WPM provides a compromise scheme between indicators at all hierarchic levels based on establishing the limits of their mutual compensation im grossen at the expense of rational choice of the WPM parameters  the degree and weighting coefficients. An example of multicriteria evaluation of reliability and quality of a plane is considered.
Keywords: weighted power mean; decomposition; aggregation; hierarchic system; multicriteria evaluation; compromise scheme; reliability; quality

• Strelnikov V.P.
  LAWS CHANGE HOURS BETWEEN FAILURE OF TECHNICAL SYSTEMS IN OPERATION

The regularities of changes in the mean time between failures of restorable systems by statistical modelling of the systems and the theoretical estimates based on a two-parameter diffusive no monotonous distribution. Shown that the MTBF decreases during the operation to a certain minimum value corresponding to the established steady recovery.
Keywords: Restorable system, operating time between failures, mean time between failures (MTBF), failure intensity

• R.Viertl
  ON RELIABILITY ESTIMATION BASED ON FUZZY LIFETIME DATA

Real lifetime data are never precise numbers but more or less non-precise, also called fuzzy. This kind of imprecision is connected with all measurement results of continuous variables, therefore also with time observations. Imprecision is different from errors and variability. Therefore estimation methods for reliability characteristics have to be adapted to the situation of fuzzy lifetimes in order to obtain realistic results.
Keywords: Bayesian inference, fuzzy lifetimes, reliability estimation

• Vasin V. A., Ivashov E. N., Kuznetsov P. S., Stepanchikov S. V.
  INCREASE OF RELIABILITY OF INTRACHAMBER SYSTEMS HIGH VACUUM ANALYTICAL AND THE PROCESS EQUIPMENT

Questions of increase of reliability of intrachamber systems of the ultrahigh vacuum equipment are considered at use of devices with contactless magnetic interaction. The technique and results of calculations of devices on introduced pollution by the deterioration microparticles are presented, allowing to reduce to a minimum introduced pollution, to raise reliability of intrachamber systems and to optimise parametres projected ultrahigh vacuum analytical and the process equipment of electronic technics.
Keywords: The ultrahigh vacuum equipment, Intrachamber systems, Contactless magnetic interaction, Introduced pollution, Deterioration microparticles.

Functional safety.

• Gorelik A. V., Taradin N. A., Zhuravlev I. A.
  METHODS OF ANALYSIS OF THE OPERATIONAL SAFETY FOR THE RAILWAY AUTOMATICS AND TELEMECHANICS SYSTEMS

In this article are presented methods of analysis of the operational safety for the railway automatics and telemechanics systems (RAT), developed on the basis of the theory of random pulse streams and the queuing theory. As indicators of the operational safety devices (systems) RAT the authors suggest to use probability of transition of the device (system) RAT in the course of functioning in an active dangerous condition for an estimated time, and also average intensity of such transition. The method of the comparative analysis of the operational safety for the RAT systems on railway crossings taking into account action of several destabilizing factors.
Keywords: railway automatics and telemechanics systems, safety, reliability, the dangerous failure, destabilizing factor, random process, the pulse random stream, the serving device

• Zaytseva O.B.
  OPTIMUM STRATEGY OF MANAGEMENT IN SEMI-MARKOV SAFETY MODELS

In this article the model of controlled semi-Markov process with accidents with reference to a safety problem is investigated. Characteristics (indicators) of safety are entered, classification of states of the system of safety is resulted. The theorem of existence of decisions is proved, the theorem about structure of characteristics of safety (dependence on management strategy) is proved. Optimum strategy of control is constructed. The theoretical results are used for the analysis of characteristics of safety of the technical system which protects object (the information, territory, etc.). Connection of characteristics of reliability (non-failure operation and maintainability) and safety characteristics is established.
Keywords: controlled semi-Markov process, homogeneous Markov randomized strategy of control, reliability, safety, non-failure operation, maintainability.

• Ustich P. A, Ivanov A.A., Averin G. V, Kuznetsov M. A., Petrov S.V.
  SOME ASPECTS OF A PROBLEM OF SETTING THE LEVEL OF TRAFFIC SAFETY BY THE EXAMPLE OF RAILWAY TRANSPORT”

Of great importance for such a complex system as railway transport (including its subsystems) is balancing of its state parameters. Among all the state parameters, safety parameters have a special place. The methodology of optimization of the car safety indicator and algorithm of bringing its optimum value in balance with parameters of railway transport state are presented in the paper. The probability model of the car accident rate (developed at МIIТ) allows considering the influence of various railway transport subsystems (i.e. damages to elements of the transport system caused by employees of its units). Therefore, the indicator of safe operation of the car can serve as an indicator of operational safety of the entire railway transport. For optimization of the safety parameter (according to RAMS requirements in the field of efficient control of safety in the transport industry), a train wreck risk formula was obtained. There is used an objective function that for the first time allows taking into consideration not only time to detection, but also time to occurrence of a dangerous damage. The mathematical model of railway transport developed at МIIТ allows bringing into balance its state parameters. By virtual immersion of the found optimized safety indicator, the process of optimization of parameters of railway transport state is implemented, while the safety indicator maintains the status of a constant. As an objective function at the balancing stage, the railway transport product unit cost is used.
Keyword: Railway, complex system as railway transport, state parameters, safety, optimization, risk formula, management of safety, mathematical model of transport, balance state parameters