摘要
复杂机电产品在设计初期,由于基础数据的缺乏和主观评估的局限性等不确定因素的存在,导致传统可靠性分配理论难以有效地处理这类信息,得到的可靠性分配结果也很不合理。针对这一问题,提出一种结合专家知识经验和能够有效处理不确定信息的灰色系统理论的可靠性分配模型。其核心是应用灰色决策和灰色关联分析评估各单元之间的相对失效关系,然后将整机的可靠性指标依次按线性关系分配到每个组成单元。其特点是不仅综合考虑了各种可靠性影响因素,而且还有效地减小了主观不确定评估带来的误差。最后通过实例分析,证明了该方法的可行性和准确性。
Due to the lack of basic data and the existence of uncertain information,such as the subjective assessment etc,it was difficult for the traditional reliability allocation theory to deal with uncertainties effectively,and the reliability allocation results were not reasonable as well. To solve this problem,a reliability allocation model combined with expert experiences and knowledge and the grey system theory was proposed. The core of the new model was to assess the relative failure relationship among units by using grey decision-making and gray relative analysis method,and then the reliability index was assigned to each unit according to the results obtained above. The advantages of the model were not only considering various factors affecting the reliability,but also reducing the error brought by the subjective assessment.Finally,the feasibility and accuracy of the new model were verified by case study.
出处
《机械科学与技术》
CSCD
北大核心
2016年第6期906-912,共7页
Mechanical Science and Technology for Aerospace Engineering
基金
国家自然科学基金项目(51175527)
国家科技重大专项项目(2011ZX04003-031
2012ZX04011-031
2013ZX04005-012
2013ZX04012-012
2013ZX04012-031
2013ZX04012-061
2013ZX04012-041
2013ZX04011-013
2013ZX04012-051
2014ZX04001-031)资助
关键词
可靠性分配
灰色系统理论
灰色决策
灰色关联分析
gray relative analysis
grey decision-making
grey system theory
reliability allocation
