基于bayes理论的五轴加工中心mtbf指标预测方法-journalof.pdf

第33 卷第8期 东 北 大 学 学 报 ( 自 然 科 学 版 ) Vol 33, No. 8 2 0 12 年 8 月 Journal of Nort heastern U n vers ty( N atural Sc ence) A ug. 2 0 1 2 Bayes MTBF 李翠玲, 杨 强, 张 磊, 孙志礼 ( , 110819) : M T BF , W lcoxon- M ann- Wh tney , Bayes : = 1909 3, = 919495 1 W e bull ; M T BF 8 1580( h) , [ 57670 ( h) , 1 23242( h) ] , : ; ; ( M T BF) ; Bayes ; : TH 122 : A : 1005- 3026( 20 12) 08- 1182- 04 MTBF Estimation for Five- Axis Machining Center Based on the Bayesian Theory L I Cui-ling, YAN G Qiang , ZHA N G L ei, S UN Zhi-l i ( School of M echan cal Eng neer ng Automat o n, N ortheastern Un vers ty, Shenyang 110 819, Ch na. Correspond ng author : YA NG Q ang, E- ma l: q ang yang @ ma l. neu. edu. cn) Abstract: T he pr or d str but on of t he m ean t me bet ween fa lures ( M T BF) of a mach n ng center w as obt a ned accord ng t o t he prev ous fa lure data from s m lar mach ne t ools produced n bat ches, and t he compat b l ty of the pr or nformat on w t h the n- s t u data w as exam ned us ng the W lcoxon- M ann-Wh tney rank sum t est. T he rel able l fe of t he mach n ng center was pred ct ed onl ne based on the Bayes an t heory comb ned w th t he pr or d st r but on dat a and t he sm all sample f a lure data of t he mach n ng center . T he result s show that t he fa lure t me d st r but on of the m ach n ng center follow s the tw o- parameter We bull d str but on , . e. , = 1909 3, = 919495 1. T he po nt est mat on value of t he MT BF s 815. 80( h) and t s nterval est mat on value s [ 576. 70 ( h) , 1 232 . 42( h) ] . T he met hod proposed s su t able for t he small sample s t uat