关键词: 可倾瓦推力轴承, 基于实例推理, 相似理论, 属性权重, 敏感性分析

Abstract: Case-based reasoning (CBR) method was applied to scheme design for tilting-pad thrust bearing in order to overcome the problems existing in the traditional bearing design, such as complexity of the design process, excessive dependence on designers'experience, lack of accumulation and inheriting of design knowledge. To further advance the retrieving efficiency and quality, the method of case representation, similar case matching and case reuse in CBR system were improved by introducing the basic principles of similarity theory and similarity system theory. Taking similar rules as the main case attributes, sensibility analysis was proposed to configure the attributes weight. The similarity measure method based on attribute diversity factor was introduced to match the most similar case to target case. It could be evaluated and revised easily after the most similar case was converted into the initial scheme by structural characters in case reuse. Finally, a case study was demonstrated in detail to show the rationality and validity of the proposed methods.

Key words: tilting-pad thrust bearing, case-based reasoning, similarity theory, attribute weight, sensibility analysis