基于任务可靠性的多阶段系统设备投入策略优化模型  

Optimization model of components placement strategy based on phased-mission system reliability

作　　者：段东立[1] 

机构地区：[1]武警工程大学装备工程学院,西安710086

出　　处：《系统工程理论与实践》2015年第2期424-429,共6页Systems Engineering-Theory & Practice

基　　金：联合实验室开放基金(FOM2014OF016);国家自然科学基金(71401178)

摘　　要：为保证多阶段任务系统的高可靠性,在执行各阶段任务的过程中不仅会设置设备备份,同时也会设置复杂的任务执行方案备份.本文通过研究多阶段系统在各阶段的可执行任务状态空间、状态转移关系以及各阶段之间的状态影射关系,构建了该类系统的Markov可靠性模型.并以各阶段初的设备投入策略作为决策变量,系统的任务可靠性作为优化目标,设备投入工时作为约束条件构建了多阶段系统的设备投入策略优化模型.算例分析表明,本文模型利于对多阶段系统开展可靠性分析与系统的设备投入策略分析.To maintain high level of mission reliability, phased mission system generally takes both device backup measure and execution plan backup measure in the process of task execution. A Markov reliability evaluation model of the system is proposed by analyzing state transition relationship and state mapping relationship between two consecutive stages in this paper. An optimization model for mission reliability is put forward with task execution plan as its strategic variable, mission reliability as optimization objective and device working hours as constraints. The typical example shows the rationality and effectiveness of the proposed model in PMS.

关 键 词：任务可靠性 马氏过程 多阶段任务系统 优化 

分 类 号：N949[自然科学总论—系统科学]