系统工程理论与实践
繫統工程理論與實踐
계통공정이론여실천
Systems Engineering—Theory & Practice
2010年
7期
1272~1278
,共null页
多阶段任务系统 确定与随机Petri网 任务成功率 测试性需求 指标确定
多階段任務繫統 確定與隨機Petri網 任務成功率 測試性需求 指標確定
다계단임무계통 학정여수궤Petri망 임무성공솔 측시성수구 지표학정
phased-mission systems (PMS); deterministic and stochastic Petri nets (DSPN); mission readiness probability; testability requirement; index determination
针对多阶段任务系统(PMS)的测试性需求分析问题,提出了一种基于确定与随机Petri网(DSPN)的系统级测试性需求模型(PMS—DSPN)和指标确定方法.PMS—DSPN模型包括系统网(SN)和阶段网(PhN)两部分,每个SN对应于各个子阶段任务的GSPN测试性需求模型;PhN对应于各个阶段任务间的转换过程,并通过关联矩阵进行描述.基于该模型得到PMS任务成功率计算方法,并结合PMS维修代价、测试性设计代价计算方法,构造了系统级测试性指标优化分析模型,进而确定PMS系统级测试性指标.最后通过实例验证该方法的有效性.
針對多階段任務繫統(PMS)的測試性需求分析問題,提齣瞭一種基于確定與隨機Petri網(DSPN)的繫統級測試性需求模型(PMS—DSPN)和指標確定方法.PMS—DSPN模型包括繫統網(SN)和階段網(PhN)兩部分,每箇SN對應于各箇子階段任務的GSPN測試性需求模型;PhN對應于各箇階段任務間的轉換過程,併通過關聯矩陣進行描述.基于該模型得到PMS任務成功率計算方法,併結閤PMS維脩代價、測試性設計代價計算方法,構造瞭繫統級測試性指標優化分析模型,進而確定PMS繫統級測試性指標.最後通過實例驗證該方法的有效性.
침대다계단임무계통(PMS)적측시성수구분석문제,제출료일충기우학정여수궤Petri망(DSPN)적계통급측시성수구모형(PMS—DSPN)화지표학정방법.PMS—DSPN모형포괄계통망(SN)화계단망(PhN)량부분,매개SN대응우각개자계단임무적GSPN측시성수구모형;PhN대응우각개계단임무간적전환과정,병통과관련구진진행묘술.기우해모형득도PMS임무성공솔계산방법,병결합PMS유수대개、측시성설계대개계산방법,구조료계통급측시성지표우화분석모형,진이학정PMS계통급측시성지표.최후통과실례험증해방법적유효성.
The paper presents a deterministic and stochastic Petri nets (DSPN) framework for system-level testability requirement modeling and index determining of phased-mission systems (PMS), named PMS- DSPN. It includes the system net (SN) and phased net (PhN). Each SN is represented by a generalized stochastic Petri nets (GSPN) testability requirement model of each sub-phased-mission, and the PhN is correspond to transition between sub-phased-missions, which is described with incidence matrix. The mission readiness probability of PMS can be calculated based on the model. Consider the maintenances and testability design cost, it constructs an optimization-model for PMS system-level testability index. Experiment results demonstrate that the method is effective.