基于可靠度和效费比的特种车辆维修策略优化方法

为解决军用特种车辆维修周期设定不当导致的维修成本增加、效率降低等问题,提出一种单个更换周期不完全预防性维修计划的方法.采用役龄回退因子和故障率递增因子的混合故障率函数描述部件故障率变化趋势,引入惩罚机制来减少偶然因素引起的故障维修延时问题,以可靠度和维修方式效费比为约束条件确定维修周期.以某型军用车辆为例,通过预先设定的可靠度阈值确定预防性维修周期,根据计算不同预防性维修方式的效费比选择维修方式,生成维修方案,并与传统方案进行对比.结果表明:该方法能有效降低故障率,提高维修工作效率,减少维修资源浪费.

Optimization Method of Special Vehicle Maintenance Strategy Based on Reliability and Cost Effectiveness Ratio

In order to solve the problems of increasing maintenance cost and reducing efficiency caused by improper setting of maintenance cycle for military special vehicles, a method of incomplete preventive maintenance plan for single replacement cycle was proposed. The mixed failure rate function of service age regression factor and failure rate increasing factor is used to describe the change trend of component failure rate. The penalty mechanism is introduced to reduce the maintenance delay caused by accidental factors, and the maintenance cycle is determined with the constraints of reliability and cost-effectiveness ratio of maintenance mode. Taking a certain type of military vehicle as an example, the preventive maintenance cycle is determined by the preset reliability threshold, and the maintenance mode is selected according to the efficiency cost ratio of different preventive maintenance methods, and the maintenance scheme is generated and compared with the traditional scheme. The results show that the method can effectively reduce the failure rate, improve the maintenance efficiency and reduce the waste of maintenance resources.