Correlated Failures Analysis in Navigation System

The article deals with the problem of mathematical modeling of correlated vector of failures that can occur in navigation system. The modeling problem is considered for the case of two-dimensional distribution. This distribution corresponds to the event, when failure of whole navigation system occurs only in case of simultaneous failures of two structural units of the system. The article presents several methods of exponential correlated field formation. The modeling results can be used in case of design of operation strategy according to the condition with control of diagnostic variables to determine the optimal time interval for preventive maintenance action realization.