【作者】 蒲双全；

【导师】 李晓豁；

【作者基本信息】 辽宁工程技术大学 ， 机械设计及理论， 2005， 硕士

【摘要】 方案设计是产品设计的关键环节,是决定产品质量的重要步骤。论文采用方案决策理论、系统可靠性理论和工程模糊理论,研究了万向电动叉车方案设计阶段的方案决策方法;结合万向电动叉车的结构特点,提出了关键技术的新方案,并对其建立了评判模型,给出了根据评判结果进行方案优选的方法;论文还根据机电产品评判的指标体系,建立了万向电动叉车系统可靠性的模糊综合评判模型;通过系统结构和失效模式的分析,构造了系统故障树模型,并对其进行了定性分析和定量模糊分析,提出了故障树模糊定量分析的新方法。研究表明,在万向电动叉车方案设计阶段,严格按照可靠性要求进行设计,将可靠性指标体系设计到产品中去,可有效地保证万向电动叉车最终产品质量。更多还原

【Abstract】 Scheme design is a key link of product design and an important step of determining product quality. In this thesis, the decision theory of the scheme, the reliability theory of the system and the fuzzy theory of project are adopted to study the method of scheme decision in the course of the scheme design of the multidirectional electric forklift. In addition, according to the fork’s structural characteristic, the new scheme of key technology is proposed and its model of the evaluation is set up. And based on the result of evaluation the method of seeking the optimum scheme is provided. According to the index system of evaluating the electric product, the model of fuzzy comprehensive evaluation of the systematic reliability of the multidirectional electric forklift is set up. By the analysis of systematic structure and fault mode, the systematic fault tree model of the structure is established with qualitative and with fuzzy quantitative analysis about it, and the new method of quantitative fuzzy analysis of fault tree is put forward.Studies have shown that if, on the scheme design phase of the multidirectional electric forklift, the reliability and its index system are considered strictly according to design demand, the final product quality can be guaranteed effectively.更多还原