摘要
为了描述维修活动对相控阵雷达天线阵面系统的影响,构建了以可靠度为基础的"修旧不如新"定期维修优化模型。对相控阵雷达T/R单元失效下的天线性能参数进行分析,根据指标确定系统不能正常工作的失效T/R单元阈值;针对大部分维修活动都难以使T/R单元修复如新的事实,引入失效率递增因子,在系统一定的可靠度水平上,以相控阵雷达系统的使用可用度和维修费用率为优化决策参数,建立了系统的维修优化模型,并运用边际效能算法对系统的最佳预防换件维修周期和换件维修组数量进行求解。实例运算结果表明,该模型突破了已有模型"修旧如新"的限制条件,更符合实际,能为维修策略的制定提供理论依据。
In order to describe the maintenance activities for the phased array radar′s antenna system,a time based maintenance model that “T/R unit can not be restored to as good as new” under the foundation of reliability was built. Firstly,the antenna′s construction parameters under the T/R unit failure in series were analyzed and the threshold value of failure T/R unit was determined. Then in view of the fact that“T/R unit can not be restored as good as new”,a maintenance model that minimizes the average cost per unit time under the restriction of antenna′s operational availability was established by introducing failure rate increasing factor. Finally,the marginal efficiency analysis algorithm was applied to achieve the optimized maintenance cycle and service group. Several examples are given to verify that the model excludes the restriction of “T/R unit cannot be restored to as good as new”,which are more in accordance with the actual situation and will provide the theoretical foundation for preventive maintenance policy.
作者
蒋伟
盛文
刘诗华
鲁力
JIANG Wei;SHENG Wen;LIU Shihua;LU Li(Air-Defense Early Warning Equipment Department,Air Force Early Warning Academy,Wuhan 430019,China)
出处
《国防科技大学学报》
EI
CAS
CSCD
北大核心
2019年第2期138-143,共6页
Journal of National University of Defense Technology
基金
国家自然科学基金资助项目(61401503)
军内科研重点资助项目(KJ2012225)
关键词
相控阵雷达
可靠度
失效率
使用可用度
边际效能
phased array radar
reliability
failure rate
operational availability
marginal efficiency
