DK77系列电火花线切割机床可靠性评价模型  

Reliability Evaluation Model of DK77 Series WEDM

作　　者：张宏斌[1,2] 贾志新[1] 郗安民[1] 姜坤 

机构地区：[1]北京科技大学机械工程学院,北京100083 [2]陆军航空兵学院机载设备系航空仪表教研室,北京101114 [3]济宁市技术学院,山东济宁272013

出　　处：《制造技术与机床》2010年第4期88-91,共4页Manufacturing Technology & Machine Tool

基　　金：国家自然科学基金项目(50875021)

摘　　要：通过应用模糊神经网络,以模糊综合评价法为基础,以DK77系列电火花线切割机床可靠性指标:平均无故障工作时间(MTBF)、平均维修时间(MTTR)、使用有效度A和故障频度γ为可靠性评价参量建立了DK77系列电火花线切割机床可靠性综合评价模型。实例证明,该模型通过神经网络自适应训练对各评价参量的隶属函数进行了修正,实现了对DK77系列电火花线切割机床可靠性的综合、准确评价,具有一定的实用价值。同时该方法对于其他数控机床可靠性评价工作具有一定的借鉴意义。Based on the fuzzy neural networks, the reliability evaluation model of DK77 series WEDM is established. The basis of the model is reliability fuzzy comprehensive evaluation method. The reliability indexes of DK77 series WEDM ： Mean Time between Failures （ MTBF ）, Mean Time to Repairs （ MITR ）, Using Availability （ A ） and Failure Frequency （γ） are taken as the reliability evaluation parameters. It is shown by the example that the membership functions of every evaluation parameters are modified by adaptive training of the neural networks. The comprehensive and accurate reliability evaluation of DK77 series WEDM is realized, and this method has certain reference meaning for the other NC machine reliability evaluation.

关 键 词：电火花线切割机床 可靠性评价 模糊神经网络 模糊综合评价 

分 类 号：TG661[金属学及工艺—金属切削加工及机床]