A Fuzzy Number based Hierarchy Analytic Method and Applications in Design of Rehabilitation Devices

Bingjie Song, Q. Peng, Jian Zhang, P. Gu
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Abstract

Introduction: Conceptual design develops design candidates based on product requirements. Product requirements may be decided from customer needs, benchmarks of competing products, and other criteria. These requirements are then translated into measurable technical attributes that can be used to evaluate design candidates. Criteria must be considered to choose a best design. Designers need to identify corresponding alternatives of product concepts using criteria and their relative importance levels. However, mapping from product requirements into design candidates is a daunting task. There may be a number of feasible design options. As a result, an evaluation model is required for the effective solution selection. Traditional methods of the conceptual design evaluation include the expert rating, gray evaluation, quality function allocation, and fuzzy analytic hierarchy process (FAHP) methods [5]. These methods have some shortcomings, such as the lack of an objective evaluation, complex analysis process, and hard to handle inaccurate information. This research proposes an efficient method for analyzing, prioritizing, and ranking design solutions. A multi-criteria decision-making method is proposed for the evaluation of design solutions to reduce the subjective preference of decision-makers and influence of uncertain factors in the decision-making. The FAHP analyzes factors that affect the competitiveness of products using a hierarchy of the design scheme evaluation. Using triangular fuzzy numbers instead of scales in the conventional analytic hierarchy process, the method can fully consider views of experts in various fields to reduce risks of product development. Three selected rehabilitation products are used as examples to verify feasibility and effectiveness of the proposed method. An improved design of the exoskeleton device is proposed for the upper extremity exercise rehabilitation.
基于模糊数的层次分析法及其在康复器材设计中的应用
简介:概念设计根据产品需求开发候选设计。产品需求可以根据客户需求、竞争产品的基准和其他标准来确定。然后将这些需求转化为可测量的技术属性,用于评估候选设计。选择最佳设计必须考虑标准。设计师需要使用标准和它们的相对重要性水平来确定产品概念的相应替代方案。然而,从产品需求映射到候选设计是一项艰巨的任务。可能存在许多可行的设计选项。因此,需要一个评估模型来进行有效的方案选择。传统的概念设计评价方法包括专家评价法、灰色评价法、质量功能分配法、模糊层次分析法等[5]。这些方法存在着缺乏客观评价、分析过程复杂、难以处理不准确信息等缺点。本研究提出了一种有效的方法来分析、排序和排序设计方案。提出了设计方案评价的多准则决策方法,以减少决策者的主观偏好和决策中不确定因素的影响。FAHP利用设计方案评价的层次分析法分析影响产品竞争力的因素。该方法采用三角模糊数代替传统层次分析法中的尺度,可以充分考虑各领域专家的意见,降低产品开发的风险。以选定的三种康复产品为例,验证了所提方法的可行性和有效性。提出了一种用于上肢运动康复的外骨骼装置的改进设计。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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