系统工程理论与实践
繫統工程理論與實踐
계통공정이론여실천
Systems Engineering—Theory & Practice
2015年
6期
1547~1560
,共null页
两部件串联系统 “硬失效”故障 机会维修 劣化状态空间分割法 费用率
兩部件串聯繫統 “硬失效”故障 機會維脩 劣化狀態空間分割法 費用率
량부건천련계통 “경실효”고장 궤회유수 열화상태공간분할법 비용솔
two-unit systems in series;random ＂hard failure＂;opportunistic maintenance;deterioration state space partition method;the long-term average cost
针对＂硬失效＂故障的两部件串联系统,制定了周期性视情预防更换、机会更换和故障更换相结合的维修策略,提出了劣化状态空间分割方法以分析机会维修模型中系统的各种维修组合的维修概率,并给出了系统稳态联合概率密度的数值近似求解方法.应用该方法建立了基于半更新过程理论的系统长期平均费用率模型,求解最优维修策略对应的检测周期、机会和预防维修阈值.数值实验表明了劣化状态空间分割法和费用率模型的正确性和有效性,分析了优化结果对各种费用参数的灵敏程度.
針對＂硬失效＂故障的兩部件串聯繫統,製定瞭週期性視情預防更換、機會更換和故障更換相結閤的維脩策略,提齣瞭劣化狀態空間分割方法以分析機會維脩模型中繫統的各種維脩組閤的維脩概率,併給齣瞭繫統穩態聯閤概率密度的數值近似求解方法.應用該方法建立瞭基于半更新過程理論的繫統長期平均費用率模型,求解最優維脩策略對應的檢測週期、機會和預防維脩閾值.數值實驗錶明瞭劣化狀態空間分割法和費用率模型的正確性和有效性,分析瞭優化結果對各種費用參數的靈敏程度.
침대＂경실효＂고장적량부건천련계통,제정료주기성시정예방경환、궤회경환화고장경환상결합적유수책략,제출료열화상태공간분할방법이분석궤회유수모형중계통적각충유수조합적유수개솔,병급출료계통은태연합개솔밀도적수치근사구해방법.응용해방법건립료기우반경신과정이론적계통장기평균비용솔모형,구해최우유수책략대응적검측주기、궤회화예방유수역치.수치실험표명료열화상태공간분할법화비용솔모형적정학성화유효성,분석료우화결과대각충비용삼수적령민정도.
A preventive-maintenance structure is presented for two-unit systems in series with random ＂hard failure＂,which combines periodic condition-based preventive replacement,opportunistic replacement and corrective replacement.Deterioration state space partition method is proposed to analyze all the possible maintenance group and their corresponding maintenance probabilities,and the approximate numerical solution for stationary joint probability density of the system deterioration states is derived.According to the proposed method,a long-term average cost model is established based on semi-renewal theory.The optimal inspection period of system,opportunities and preventive maintenance thresholds of each unit are jointly optimized for minimizing the cost rate.Numerical experiments are given,verifying the correctness of the proposed method and the performance of the maintenance strategy,and analyzing the influence of the cost parameters over the optimal results.
