针对元件可靠性为区间值的系统可靠性优化问题,提出一种区间多目标粒子群优化方法.首先,建立问题的区间多目标优化模型;然后,利用粒子群算法优化该模型,定义一种不精确Pareto支配关系,并给出编码、约束处理、外部存储器更新、领导粒子选择等关键问题的解决方法;最后,将该方法应用于可靠性优化问题实例,验证了方法的有效性. Aiming at the system reliability optimization with component reliability as interval value, an interval multi-objective particle swarm optimization method is proposed.Firstly, an interval multi-objective optimization model of the problem is established. Then, the particle swarm optimization is used to optimize the model, Accurate Pareto dominance relationship, and gives the solution of the key problems such as coding, constraint handling, external memory update, leading particle selection and so on. Finally, the method is applied to the reliability optimization example to verify the effectiveness of the method.