基于任务的数控机床可靠性建模、分析及分配技术研究的中期报告【摘要】本文针对数控机床在实际使用中可能遇到的故障问题，提出了基于任务的数控机床可靠性建模、分析及分配技术，旨在提高数控机床的可靠性和安全性。首先对数控机床可靠性建模、分析的基本原理进行了介绍，然后分析数控机床的工作任务特点，并对其任务进行分类和分解，建立了基于任务的数控机床可靠性模型。接着，针对不同的任务特点，采用了不同的可靠性分析方法，并利用故障树分析法对关键任务进行可靠性分析。最后，提出了数控机床可靠性分配策略，并通过实例分析验证了该策略的有效性。【关键词】数控机床；可靠性建模；任务特点；可靠性分析；可靠性分配【Abstract】BasedonthepossiblefaultsthatmaybeencounteredbyCNCmachinetoolsinpracticaluse,thispaperproposesareliabilitymodeling,analysisandallocationtechnologybasedontasksforCNCmachinetools,aimingtoimprovethereliabilityandsafetyofCNCmachinetools.Firstly,thebasicprinciplesofreliabilitymodelingandanalysisofCNCmachinetoolsareintroduced,andthentheworkingtaskcharacteristicsofCNCmachinetoolsareanalyzed,andthetasksareclassifiedanddecomposed,andatask-basedreliabilitymodelofCNCmachinetoolsisestablished.Next,differentreliabilityanalysismethodsareadoptedaccordingtothecharacteristicsofdifferenttasks,andthekeytasksareanalyzedforreliabilityusingfaulttreeanalysis.Finally,areliabilityallocationstrategyforCNCmachinetoolsisproposed,andtheeffectivenessofthestrategyisverifiedthroughcaseanalysis.【Keywords】CNCmachinetool;reliabilitymodeling;taskcharacteristics;reliabilityanalysis;reliabilityallocation