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Abstract:
In this article the author describes particular maintenance systems used in the past, some of which are used also at present. The basic maintenance systems include maintenance after use, preventive maintenance with predetermined intervals, and conditioned-based preventive maintenance - predictive maintenance. These maintenance systems were continuously improved and new ones were added - so called computerized maintenance management system, reliability centred maintenance, and total productive maintenance. The article further describes new methods of performing the maintenance based on so called proactive maintenance with using so called telemaintenance, which may be simply explained as remote-controlled maintenance.
Keywords: Telemaintenance. Maintenance. Corrective maintenance. Preventive maintenance. Predictive maintenance. Computerized maintenance management system. Reliability centred maintenance. Proactive maintenance.
1 INTRODUCTION
Quality and reliability control and the choice of optimal maintenance methods cannot be realised at present without properly functioning technical diagnostics. Thanks to the use of technical diagnostics, the maintenance itself has reached a new level which in a sense may be labelled as a completely new, generation different maintenance system.
Technical literature provides a number of definitions of "maintenance", more or less influenced by their authors or by the force of a norm upon which they are based. For the purpose of this article, the following definition according to [1] is used: "Maintenance is a combination of all technical, administrative, and managerial activities during a life cycle of an item aimed at maintaining the item in condition, or returning it to condition, in which it can perform a required function."
2 DEVELOPMENT OF MAINTENANCE APPROACHES
A vehicle is either in usable or unusable condition. Our aim is to maintain the vehicle in usable condition, which means to prevent its failures and limiting condition. This aim shall be achieved upon the lowest vehicle life cycle costs possible while keeping inherent reliability of the vehicle for the whole operating time. This is manifested in particular maintenance systems since the 1930' s until the present, which is shown in Fig. 1. In general, maintenance system approaches may be divided as follows:
1. Corrective maintenance system.
2. Preventive maintenance system - schedule based.
3. Preventive maintenance system - condition based:
a) predictive maintenance system,
b) proactive maintenance system.
2.1 Corrective Maintenance System
This maintenance system represents the lowest level of the...