CAJ | 학술논문

提出了一种航天测控系统的层次化建模方法，以及测控任务可靠性二元决策图(BDD)分析算法。在模型底层描述了测控系统的结构和任务需求信息，模型顶层将测控资源与任务进行统一，将测控单元任务弧段切割成不同阶段，建立了任务可靠性的故障树模型。采用 ITE 算法将故障树模型转换为 BDD 模型，并给出了 BDD 模型的计算方法。最后，运用实例说明了方法的有效性，进行了测控任务可靠性的灵敏度分析，找出了系统的薄弱环节。
제출료일충항천측공계통적층차화건모방법，이급측공임무가고성이원결책도(BDD)분석산법。재모형저층묘술료측공계통적결구화임무수구신식，모형정층장측공자원여임무진행통일，장측공단원임무호단절할성불동계단，건립료임무가고성적고장수모형。채용 ITE 산법장고장수모형전환위 BDD 모형，병급출료 BDD 모형적계산방법。최후，운용실례설명료방법적유효성，진행료측공임무가고성적령민도분석，조출료계통적박약배절。
This paper proposes a hierarchical modeling approach and binary decision diagram (BDD)evaluating algorithm for the mission reliability analysis of spaceflight telemetry,tracking and command (TT&C)system.The model describes the system structure at the lower level and mission information.At the upper level,components and missions are associated together.By cutting flight phase into many sections,the paper establishes a mission reliability model of fault tree.With if-then-else (ITE)algorithm,the paper transforms fault trees into BDDs,and then expresses BDD evaluation algorithm.In the end,the paper illustrates the practicability and effectiveness of the approach with an example,analyzes the sensitivity of mission reliability and identifies the vulnerable points of system.