共查询到19条相似文献,搜索用时 187 毫秒
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本文在机械设计专家系统中,综合考虑设计要求,设计目标及设计方案,建立了一种基于模糊数学的综合评价模型,并在带传动设计专家系统中得到应用,实践证明,该方法具有思路独特,运行结果合理,可靠及易于实现电算等特点。 相似文献
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本文简要介绍了专家系统的作用、结构及工作原理;阐明知识表示、知识获取及知识利用,为建立专家系统的3大关键技术的基础。最后阐述了机械设计专家系统的难点及现状。 相似文献
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近年来,基于知识的专家系统在各种应用领域取得了引人注目的实际成效,成为当前研究的重点。本文从机械设计理论出发,阐述了机械设计必须引入专家系统技术。并讨论了二个实例——优化设计的专家系统和有限元分析专家系统。表明在机械CAD中引入专家系统技术是其必然发展趋势。 相似文献
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在对可拓工程分析法的应用领域进行分析的同时,对可拓学的基本理论知识进行了详细介绍,并结合机械设计方案决策过程,建立了基于可拓理论的机械设计方案决策数学模型,为机械设计方案可行性评价及优化提供了数学支撑。 相似文献
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车载高架式光电探测系统的作战效能评估 总被引:2,自引:0,他引:2
为了准确评估车载桅杆型光电探测系统在设计阶段的效能,提出了将与探测系统直接相关的光电分系统、桅杆分系统、载车分系统进行参数综合化来分析系统作战效能的方法。引入模糊综合评估方法,以专家打分为主要评估手段对车载高架式光电探测系统进行基于总体的作战效能评估研究。将该评估方法应用于某车载高架式光电探测系统,对其搜索跟踪与引导能力、系统可用能力、系统生存能力进行了量化评估。上述三项指标的效能评估值分别为79、85和87,而系统总体效能值为82,这与系统的实际效能基本一致,证明了本方法具有一定的科学性,可推广至其他光电类系统的作战效能分析。 相似文献
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油泵-柴油机配试模糊评价及重设计模糊决策的研究 总被引:2,自引:0,他引:2
首先分析了油泵-柴油机的匹配试验的实质,然后提出配试模糊评价模型,对匹配方案进行评价和排序,建立了配试结果不满意时的产品设计参数修改的模糊决策专家系统,最后讨论了集成模糊评价和模糊重设计,进行实时测试、实时评价和实时重设计等工作 相似文献
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机械传动方案设计的模糊综合评判法 总被引:3,自引:0,他引:3
针对机器设计中的诸多模糊因素,综合应用专家评分法和模糊综合评判法建立方案评价模型,基于该模型,应用Criterium^R DecisionPlus系统对某巷道中工作的带式运输机的三种设计方案进行评价。 相似文献
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Song Changhui Huang Aibing Yang Yongqiang Wang Di Yu Jia-kuo 《The International Journal of Advanced Manufacturing Technology》2016,87(5-8):1217-1228
Life cycle assessment (LCA), as an assessment tool for environmental performance, is used widely in decision making of product design. However, apparently, it is not sufficient to make final decision only depending on environmental assessment results for profit-directed organizations. One of the main purposes of this paper is to propose a methodology for integration of LCA and economic analysis tool-life cycle costing (LCC) in order to get the integrated evaluation results. A framework of integration of LCA and LCC has been introduced, which is contained by four components: the definition of unity time and physical boundaries, integration of inventory analysis, integration of impact assessment, environmental and economic interpretation. However, the integrated evaluation results always indicate that the relationship between economic and environmental performance is not in balance. Optimization is as important as integration to eco-balance. An optimization method is proposed to improve the initial product design with maximizing the integrated environmental and economic benefit for mechanical product. In optimization step, product system is divided two parts with environmental subsystem and economic subsystem. The integrated evaluation results are adopted to support for the optimization. Some mathematic optimization models are set up for environmental and economic subsystems. Multidisciplinary design optimization is applied to optimize these models so that the initial mechanical product design can achieve the best environmental and economic performance result. A case study of type 4135G diesel engine is presented to validate the rationality and feasibility. 相似文献
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人工神经网络在机械设计中的应用 总被引:3,自引:0,他引:3
本文通过对机械设计专家系统和人工神经网络的讨论,研究了人工神经网络和专家系统技术在机械设计智能系统中的综合应用问题,并提出了人工神经网络在机械设计中的总体应用方案,为进一步研究打下了基础。 相似文献
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The configuration design of a mechanical product can be performed efficiently when it is based on a functional model. There
are some function-based design methodologies that decompose functions from the abstract level to the concrete level by matching
the functions to physical parts. However, executing innovative design is difficult when the function is matched only to pre-defined
parts. This paper describes the configuration design process of a train bogie with a design expert system that uses function
taxonomy and TRIZ. The design expert system can propose a functional model of a new part that is not on the existing parts
list of train bogies. Levels of design knowledge which describe the operations of the mechanical product at different levels
of abstraction are introduced. This is the theoretical basis for using TRIZ with the function taxonomy for configuration design.
The design expert system is adequate for controlling the design knowledge, which is expressed as knowledge of parts, functional
modeling, mapping rules between functions and parts, and TRIZ. The functional model of a new brake system in the bogie is
introduced with the design expert system. 相似文献
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车门系统是地铁列车的关键子系统,对其进行可靠性评估从而确定危害性较大的故障模式有助于提高车门的可靠性和改善车门维修决策。由于车门故障数据的不足,难以对风险因子及其权重进行准确评价而导致车门可靠性评估存在模糊性,故引入模糊理论构建模糊TOPSIS方法并应用于车门故障模式的可靠性评估中。对风险因子进行模糊评价得到加权决策矩阵,应用加权决策矩阵计算每一个故障模式到正负理想方案的相对贴近度,得出了EDCU功能失效、螺母组件破损和行程开关S1破损对车门危害性较大的评估结果。分析结果与专家经验一致,为车门的设计与维修决策提供了技术支持。 相似文献
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提出一个改进的异地合作环境下复杂产品概念设计方案模糊综合评价方法,考虑专家权重,采用二级分层评价,合成运算采用广义模糊算子,建立该方法的数学模型,搭建系统框架,最后实例验证该方法的可行性。 相似文献