基于实时可靠性的状态维修检测间隔期决策模型  

Test intervals decision-making model for condition-based maintenance based on real-time reliability

作　　者：严骏[1] 朱亮[1] 曾拥华[1] 苏正炼[1] 萧毅鸿[2] 

机构地区：[1]解放军理工大学野战工程学院,江苏南京210007 [2]南京理工大学经济管理学院,江苏南京210094

出　　处：《解放军理工大学学报（自然科学版）》2012年第6期664-668,共5页Journal of PLA University of Science and Technology(Natural Science Edition)

基　　金：总装重点预研基金资助项目

摘　　要：针对目前的状态维修检测间隔期决策模型忽视了单个部件可靠性曲线的个体特征、没有充分利用状态检测数据等不足,提出基于实时可靠性的状态维修检测间隔期决策模型。首先利用实时可靠性评估方法计算部件在检测时的实时可靠性,将部件的实际状态与可靠性联系起来,在掌握实时可靠性的基础上,充分利用部件的历史状态信息,实时调整可靠性曲线,可更准确地进行趋势预测,最后通过故障风险约束对模型进行求解,保证部件在检测间隔期内的安全运行。应用算例表明,该模型可以合理地确定下一次的检测间隔期,在故障率低的时候检测间隔期设置得比较长,避免浪费,在后期故障率越来越高的时候,检测越来越频繁,因此该模型更符合实际,满足状态维修的要求。In view of the insufficient decision-making model for the test intervals before failing to make full use of the state test data and the inability of the fixed cycle test to guarantee the reliability during the test intervals, the test intervals decision-making model for condition-based maintenance was proposed based on real-time reliability, the relationship between components state in real time and real-time reliability estab- lished, and the range test interval calculated based on equal failure risk, so the decision making is more in line with the reality. First of all, the real-time reliability of the component was calculated using real-time reliability assessment method, and the contact of actual status and the reliability was established. On the basis of master real-time reliability and the historical information of the component was fally used,and the reliability curve was adjusted to make trend forecasting more accurately. Finally, the model was solved through failure risk constraint to ensure the safe operation of the component in the test interval period. Application example shows that the model can reasonably determine the next test interval, that the test in- terval is comparatively long to avoid waste when the failure rate is low, and that the testing is more and more frequent when the failure rate is increasingly higher in the latter stage. Therefore, this model is more realistic, and can meet the requirements of the condition-based maintenance.

关 键 词：实时可靠性 检测间隔期 状态维修 故障风险 

分 类 号：TH17[机械工程—机械制造及自动化]