排序方式: 共有70条查询结果,搜索用时 15 毫秒
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液压系统模糊故障树分析方法研究 总被引:1,自引:0,他引:1
针对液压系统底事件和中间事件发生概率情况获取不足的现状,将模糊集合论和可能性理论引入故障树分析法中,将事件发生概率描述为模糊数和模糊可能性,提出了一种基于梯形模糊数算术运算的液压系统故障树分析方法,并结合压装机液压系统的“主缸快进无法实现”故障树分析应用实例,估计了出顶事件的故障概率和各底事件的模糊重要度。 相似文献
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基于三维弹性有限元理论,采用有限元分析软件对自行设计的交流液压回路中的阀块进行了应力分析。分析结果表明该阀块满足实际使用要求。 相似文献
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Theory analysis and experimental research on on-line contamination detecting technology in hydraulic oil 总被引:1,自引:0,他引:1
A system of on-line contamination detecting in hydraulic oil based on silting principle is accomplished, where, metal filter membrane as detector, solenoid as active force to propel piston to blotter and gain differential pressure, step motor drives the membrane to filtrate and counter-flush, LabVIEW as detecting software platform, oil's contamination detecting indirectly by gauging differential pressure. Based on theory analysis, accomplished is relation between contamination level and differential pressure, realizing polynomial curve fitting, and calibration experiment. Field experiment is simulated in the condition of experimental laboratory, has credible precision and real-time performance, which can popularize to the field of production. 相似文献
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利用区间模型描述根节点的失效可能性,解决根节点的失效可能性不易精确获取的问题;通过引入超椭球模型来界定不确定性参量的取值范围,解决区间贝叶斯网络在求取可靠性指标时计算结果相对保守的问题;定义超椭球贝叶斯网络的灵敏度指标,为找到系统的关键环节提供依据;结合贝叶斯网络双向推理求解出在根节点失效可能性已知的条件下,叶节点的失效可能性、根节点状态的后验可能性;给出了可靠性评估实例。 相似文献
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