• G.N. Cherkesov
  ON CRITERIA OF SELECTION OF SPTA KITS

This paper discusses conceptual issues of stocking for recovery of technical systems, including issues of selecting SPTA kits and their optimization criteria, correlation of two methods of failure correction, by repairing and by replacing a faulty element by a spare part. The paper indicates disadvantiges of the approximate method of system reliability calculation taking into account SPTA and used in the industry.
Keywords: reliability, restorable system, spare part, SPTA, sufficiency factor, strategy of replenishment.

• V.A. Volodarsky
  OPTIMIZATION OF PREVENTIVE REPLACEMENTS AND REPAIR UNDER CONDITIONS OF UNCERTAINTY

The paper presents a methodological approach to definition and solution of tasks related to preventive replacement optimization and technical equipment repair under conditions of uncertainty of initial information.
Keywords: optimization, repair, replacement, information, uncertainty.

• I.A. Chumakov, V.A. Chepurko, A.V. Antonov
  ESTIMATIONS OF RESIDUAL LIFETIME OF ALTERNATING PROCESS. COMMON APPROACH TO ESTIMATIONS OF RESIDUAL LIFETIME

The paper describes a generalized method of estimating residual lifetime for an object with an arbitrary operating strategy. Asymptotic and non-asymptotic assessments of factors converging in the long-term object operation have been obtained. The main idea of the developed approach is to bring down an arbitrary renewal process to a well-known alternating renewal process. The method makes it possible to predict the residual lifetime of equipment at the operational stage, and it can be used in estimating resource characteristics of nuclear power plant (NPP) equipment.
Keywords: residual lifetime, alternating process, operating strategy.

• Т.N. Shvetsova-Shilovskаy, T.V. Gromova, F.P. Sokolov, V.G. Ratyshenko
  COMPUNATIONAL AND EXPERIMENTAL METHOD FOR ESTIMATING RELIABILITY INDICATORS OF TECHNOLOGICAL COMPLEX BASED ON THE RESULTS OF ITS TESTING USING PRIOR INFORMATION ON RELIABILITY DERIVED FROM TESTING OF ITS COMPONENTS

The paper offers a computational and experimental method for estimating reliability indicators of complex chemical technological systems based on the results of tests using available prior information on reliability derived from testing of components. As a result, it has been found that when estimating and controlling the reliability of system using prior information, it allows us to reduce substantially the amount of its required testing.
Keywords: estimation of reliability indicators, computational and experimental method for estimating the reliability of complex systems using prior information, results of tests.

Functional reliability. The theory and practice

• S.M. Klimov, N.N. Kotyashev
  METHOD OF RISK MANAGEMENT FOR AUTOMATED SYSTEMS UNDER CONDITIONS OF CYBER ATTACKS

The paper considers a method for managing risks of automated systems under conditions of cyber attacks based on dynamic control and risk minimization of information resource violations. The method offers analytical expressions for target functionality and tolerances of risk factors enabling to make reasonable decisions on risk management of automated systems.
Keywords: automated system, cyber attack, risk management.

Functional safety. The theory and practice

• J. Braband, H. Schäbe
  ASSESSMENT OF NATIONAL REFERENCE VALUES FOR RAILWAY SAFETY. A STATISTICAL TREATMENT

In This investigation deals the decision procedure used in the Decision of the Commission to determine national reference values. In accordance with the directive of the security for each member state annually relies expect safety record. The decision for the calculation of safety performance and assess the presence of possible degradation of security used a fixed procedure. In assessing the safety of a solution instead of using the arithmetic average of the weighted sum.
Keywords: automated system, cyber attack, risk management.

• A.V. Goryainov, A.M. Zamyshlyaev, E.N. Platonov
  ANALYSIS OF THE INFLUENCE OF FACTORS ON DAMAGE CAUSED BY TRANSPORT ACCIDENTS USING REGRESSION MODELS

The paper analyzes accidents on transport. It offers to use regression analysis methods to analyze the impact of various factors on traffic safety. The authors propose to apply a model of the dependence of damages caused by transport accidents on a set of negative factors that influence its occurrence. A non-linear regression model with discontinuity is applied for construction of the model. The model is constructed to obtain data on actual or predictable levels of train traffic safety. These data are necessary to assess the adequacy of measures aimed at ensuring the standard safety level to minimize the resources allocated to the tasks of safe train operations, including justification of priorities in the allocation of resources. In the paper, we consider two examples. The first example shows the results of calculations based on real data about accidents on the USA railways. The second example is constructed using the results of computational simulation of the degree of damage and factors.
Keywords: railway transport, traffic safety, regression analysis.