전투 시스템의 통합 신뢰성 분석 방법론

Abstract

Combat systems accomplish missions in military domains and should be reliable. The reliability of the combat systems is the ability of avoidance and tolerance of damage from threats. To build high-reliable combat systems, reliability analysis for each component in combat systems is required in the design phase. The component should be improved in performance through the analysis. For this reason, many researches have highlighted the reliability analysis of combat systems and most of them are based on modeling and simulation because combat systems as analysis targets are very dangerous and the purpose of analysis is limited to certain areas such as military domains. Such researches, however, are restricted to analysis targets (eg. armored fighting vehicles and warships) and analysis purposes (eg. penetration and flash-fire).

In order to alleviate the limitations, this thesis proposes a methodology of integrated reliability analysis for combat systems based on modeling and simulation. The proposed methodology consists of four steps: The first step specifies user requirements and defines a analysis scenario. The second step selects models of components in a combat system and generates the models for simulation. The third step generates a simulation architecture which consists of the models and conducts a simulation to compute hit probabilities of the models. The final step analyzes integrated reliability for the combat system and, for analyzing reliability, uses two methods which this thesis proposes: The first method calculates occurrence probabilities of kill-criteria based on hit probabilities for function-level reliability analysis by using the fault tree analysis (FTA) technique. The second method analyzes criticalities of components based on importances and hit probabilities for component-level reliability analysis by using the failure mode, effectiveness and criticality analysis (FMECA) technique. For verifying the proposed methodology, this thesis develops a integrated reliability analysis system for combat systems. Through various experiments, this thesis has observed that the proposed methodology is promising for reliability analysis for combat systems.

Consequentially, the proposed methodology can overcome the limitations of previous researches, can analyze the reliability of combat systems against various types of threats, and can evaluate the integrated reliability based on function-level and component-level analysis in the design phase of combat systems.