关键词: 复杂机械设备, 预防性维修, 多故障模式, 维修成本, 遗传算法

Abstract: Based on the analysis of multiple failure modes,a Preventive Maintenance (PM) scheduling for complex mechanical device was proposed.According to system structure and function features,the key failure modes were identified.The dependences between failure modes,the maintenance level and the maintenance effects of complex mechanical device were discussed.The objective cost function of PM was constructed further by using failure time distribution,and the integer-constrained nonlinear optimization problem achieved by genetic algorithm was adopted to solve this function.The proposed approach was illustrated in a ram feed subsystem of a boring machine,and the effectiveness was proved.

Key words: complex mechanical device, preventive maintenance, multiple failure modes, maintenance cost, genetic algorithms