Estimation of Redundant Radionavigation System Reliability

In process of redundant radio navigation system diagnosing there occur the errors in determination of active functional unit operability. It leads to system performance degradation including the faultless probability decrease. This paper covers the development and investigation of redundant system diagnostics mathematical model. This model takes into consideration the diagnosing tool credibility characteristics, monitoring periodicity and the system imperfect quality at functioning initial time instance. Diagnosing tool performs the system operability indication function after switching to last redundant unit but not the unit switching function. This excludes the impact of the “false fault” type monitoring errors and improves the system reliability.