Abstract
The article provides the issues of improving the models of reliability and optimization of maintenance and repair of special self-propelled rolling stock (SPRS) with a compatible system of diagnostics. A new maintenance strategy is proposed, taking into account the new requirements of the self-propelled rolling stock. Examples of solving practical problems of reliability indices are considered.
 The study of the reliability of SPRS, as an object, is advisable to start with its presentation in the form of a system of assembly units. In this sense, the level of consideration is important. Figure 1 gives a structural diagram of SPRS, as a system consisting of elements. for several possible levels of consideration. SPRS, as a system of elements, makes it possible to concretize the task of analyzing and improving the reliability model and developing measures to perfect it.
Highlights
The development of a reliability model for special self-propelled rolling stock (SPRS), which unites a class of different types of rail service cars, track motorcars, provides for the solution of the tasks aimed at ensuring the good condition of the equipment, economical operation, carried out with a certain frequency and sequence at optimal labor and material costs, and in the final stage of maintenance aimed to prevent the downtime of the transportation process
If the elements of the system are logically connected in series, each element predetermines all reliability indices, and if the elements are connected in parallel, the failure of one element may not affect the failure of the object or its units
If we a contradictory situation arises: a certain number assume that the overhaul period is Lav, during of units will have failures, leading to emergencies this mileage more than half of the units will have with corresponding costs, while others will have failures with certain consequences, and the other underutilized remaining resources, leading to part of the units replaced during scheduled repairs certain reduced costs
Summary
The development of a reliability model for special self-propelled rolling stock (SPRS), which unites a class of different types of rail service cars, track motorcars, provides for the solution of the tasks aimed at ensuring the good condition of the equipment, economical operation, carried out with a certain frequency and sequence at optimal labor and material costs, and in the final stage of maintenance aimed to prevent the downtime of the transportation process. The study of the reliability of SPRS, as an object, is advisable to start with its presentation in the form of a system of assembly units [1, 2]. In this sense, the level of consideration is important. SPRS, as a system of elements, makes it possible to concretize the task of analyzing and improving the reliability model and developing measures to perfect it
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