�������� ���������� ��в�������Ҳ ���Ͳ����� �������������� ������� ������ί ���Ͳ��ί �������

Abstract

The article deals with the problem of determining the periodicity of technical maintenance of the comp onent technical system, the method of its solution is proposed. The case in which the means of the system provide the specified modes of its functioning (use) by timely service is considered. At the same time, the means themselves have different modes of operation (application). Malfunction or delayed maintenance of means may adversely affect the operation (use) of the system itself. It is shown that under conditions when the system means have different levels of reliability and, as a result, different maintenance intervals, ensuring the specified operating modes of the system requires finding a compromise periodicity of their maintenance. Great number of values for optimal service periods, corresponding to a multitude of means, form such a set of maintenance cycles that its practical implementation is irrational. Consequently, there is a need to regulate the set of maintenance cycles of means by finding a compromise, close to optimal, the values of the maintenance period of all means of the system. It is obvious that such a compromise is a reflection of the decision rule, which must be introduced informally and determine itself the permissible divergence of the values of the means maintenance periods from the optimal values of the periodicity of means maintenance. A rule for choosing the period for maintenance of means is offered. It is shown that from the point of view of ordering the terms of means maintenance, the multiplicity of periods of their maintenance is acceptable. It is proposed to maintain the means of the system with periodicity that is multiple to the service period of the least reliable means. A decision rule has been proposed for determining the maintenance period of each facility, which determines the choice for each means of a certain admissible value of its availability factor and for determining the limit of the allowable service period for each facility. The value of such a period is determined by the fact that the availability factor of the means will not be less than a certain acceptable value. By the example of three means with different level of reliability, the applicability of the proposed method is shown. Calculations show that a certain deviation of the value of the means availability factors from their maximum values allows expanding the range of acceptable values for the maintenance period. Admissible values can be defined as a certain part of maximum value of the availability factor. It is shown that the permissible periodicity of maintenance of means is not limited to only the optimal value, but can be in a certain interval. This allows determining of the values of maintenance periods of means that will ensure their operation with the required availability factor. For determining compromise availability factors the range of permissible values of the service intervals of means, limited by the optimal value of the periodicity of maintenance and the maximum admissible, is preferred. Calculations show that in this area the required availability is achieved with a greater periodicity of service. Since the periods of maintenance of separate means are found from the multiplicity condition, this ensures an organizationally rational maintenance of the means of a comp onent technical system.