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 Wysłany: Nie 11:11, 05 Gru 2010 Temat postu: stivali ugg With the move of a gun system reliabil |
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With the move of a gun system reliability and maintainability analysis
Consider the following two costs: (1) preventive maintenance costs c (2) damages caused by failure mound which includes maintenance costs for each fault and fault, the average loss costs. A similar analysis applied to the previous method, we can get the following formula: A c +) df (5) '. ~ Where H,stivali ugg, (- preventive maintenance is completed to the period from the end of the total cost; - the average cost per unit time; .398. Harbin Shipbuilding Engineering Institute Volume 13 C - Preventive maintenance costs. To get / T the most hours of the rf,ugg milano, as long as (5) on T ~ t / 0 \I (t) dt = () comparison (2) and (6) can be seen, as long as (2) of the M-j, and. replaced by C and that by (6) that . If the repair time and repair costs proportional to Xinjiang,ugg italia, both the optimal solution will be the same. so minutes) A d2 (t) 4LA. (6) yields the J0) dr ') from (7), we know Only when the \maintenance cycle, that is, = (・) i iv For this system, in ~ dC / K = M a. / M-o then the validity maximum system preventive maintenance cycle and maintenance costs the most hours of preventive maintenance cycle will be the same. has been to prevent the gun servo system maintenance c = 1.65 million = lIl million in damages fault, this time the most hours of the system cost of preventive maintenance cycle l ● r,: f.: 384h '\ 1. 33 A ll: l / from the above analysis, for the gun servo system, the average time between failures for the l13h. If you consider the system to effectively 'degrees maximum, then the desirability of periodic preventive maintenance of the system is 403h; if they consider the system dimension miserable minimum cost, the system of preventive maintenance cycle may be taken as 384h. From the calculation results,true religion jeans, the gun servo system of preventive maintenance cycle or in the effective maintenance of the maximum degree of the hour is basically the same difference is small. References 1 Li Shouren . Reliability Engineering. Harbin Shipbuilding Engineering Institute Press, 19912 Xu Restoration. Qinying Xiao. reliability engineering. Beijing: Electronic Industry Press Du,ugg stivali, 1988t 4 Li Shouren: a gun servo system reliability and maintainability analysis 399 * 3 Hu Changshou a reliability engineering design, testing, analysis and management. Beijing: Astronautics Press. 1989AnalysisofReliability-andMaintainabilityonFollow - upSystemofCertainNavalOrdnance (Dcpt.ofMechanicalEng.) AbstractItisknownfromstatistiealanalysisoftroubledataofthefollow-upSystemofcertainnavalordnancethatthctroubledistributionfunctionofthesystemisWeibulldistribution.ThustheMTBFofthesystemisdeterminedandtheoptimuin-prcvent ~ 6maintenancepc-riodisobtainedundergivenmeanmaintenancetimcandma '~ ntenanceCost.TheresultoftheanalysisandcomputationshowsthattheMTBFofthissystemis 】 13hours.Thepre-ventivemaintenanceperiodofthesystemunderthemaximumavailabilityorthelowestmaintenanceCOStis403hoursor384hours.KeyWords: reliability; maintainability; Weibu1ldistribution
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