THE DEVELOPMENT OF THE BASIC ELEMENTS FOR BUILDING A FREIGHT CAR RELIABILITY STUDY SYSTEM
Keywords:
system reliability study, failures, freight carsAbstract
The paper developed basic elements for the construction of the system reliability study of freight cars, including database and knowledge. At the same time it offered a block diagram of the system of freight cars and the reliability of the study described an algorithm for obtaining the knowledge of statistical data on failures of freight cars associated with the construction of models for various proximity, both observable categorical characteristics or represented by simple associative rules. For the construction of freight cars reliability study of the system involved fuzzy logic. The system of freight cars reliability studies based on knowledge of the communication fault indication and fault itself corresponding freight cars, which are formed by specialists repair and maintenance depots to be used the final confidence index at a given hypothesis a priori probabilities justice hypotheses with certain characteristics of freight cars fault. Freight car reliability study of the system contains a database of failures of freight cars and the knowledge base of refusals (hypotheses) or specific evidence (symptoms, causes) the possible occurrence of failures and their consequences (corresponding to the degree of severity). Database failures freight cars will serve the working memory system reliability study of freight cars for storing various input, output, and intermediate statistical data on failures that will be needed to solve the problem to ensure the appropriate level of design, technological and operational reliability of the freight cars. When the facts of new information updated, should be established working memory elements for each fact in the form of cortege are of fixed length. Group variable (failures and certificates), which are connected to each other, it is more convenient to store together in a cortege. The rows database table Bounce is a cortege of fixed length, content of which is carried out to establish the existence of failures of the freight cars according to the type and model that is followed by the establishment of the link between evidence (symptom) and failure (hypothesis) at a certain mileage of the freight cars.
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