Identification of to-be-improved components for redesign of complex products and systems based on fuzzy QFD and FMEA
Identification of to-be-improved components for redesign of complex products and systems based on fuzzy QFD and FMEA
复制标题
DOI：
10.1007/s10845-016-1269-z
复制
发表时间：
2016-10
影响因子：
8.3
通讯作者：
Hongzhan Ma;Xuening Chu;D. Xue;Dongping Chen
中科院分区：
文献类型：
--
作者：
Hongzhan Ma;Xuening Chu;D. Xue;Dongping Chen
由于复杂产品和系统（CoPSs）的设计活动主要集中在对现有CoPSs进行重新设计以满足客户需求和提高产品可靠性，因此识别待改进的组件在重新设计过程中起着关键作用。在现有的待改进元器件识别方法中，主要考虑了用户需求，而忽略了故障知识这一提高产品可靠性的关键信息。本研究的目的是确定要改进的组件，同时考虑客户的要求和产品的可靠性。通过质量功能展开将顾客需求用于再设计，通过失效模式与效应分析（FMEA）将可靠性用于再设计。与传统FMEA不同，本文分析了零部件之间和零部件内部的故障因果关系，为更有效地利用故障信息构建有向故障因果关系网络提供了一种手段。在该网络中，所有组件的故障模式被建模为顶点，故障模式之间的因果关系被建模为有向边。从可靠性的角度，综合考虑了内部失效和外部失效的影响，提出了一种新的指标来计算构件的重要度。建立了模糊永久函数来度量内部失效效应，建立了外部失效效应指数来度量外部失效效应。以履带式起重机操作装置为例，验证了该方法的有效性。
Since the activities to design complex products and systems (CoPSs) mainly focus on redesign of the existing CoPSs to satisfy customer requirements and improve product reliability, identification of the to-be-improved components plays a key role in the redesign process. In the existing methods to identify the to-be-improved components, customer requirements are primarily considered while the failure knowledge, a critical information to improve product reliability, is often ignored. The objective of this research is to identify the to-be-improved components considering both customer requirements and product reliability. The customer requirements are used in redesign through quality function deployment, while the reliability is used in redesign through failure mode and effects analysis (FMEA). Different from the traditional FMEA, the failure causality relationships between and within components are analyzed in this work to provide a means of making use of failure information more effectively for constructing a directed failure causality relationship network. In this network, the failure modes of all components are modeled as vertices, and the causality relationships between failure modes are modeled as directed edges. A new index is introduced to calculate the importance of component from the viewpoint of reliability through integrating the internal and external failure effects. Fuzzy permanent function is developed to measure the internal failure effects, while the external failure effect index is developed to measure the external failure effects. A case study for identification of the to-be-improved components for the operation device of a crawler crane is implemented to demonstrate the effectiveness of the developed approach.