DesignSystemoftheTwo__省略_onCase_basedRea.caj.pdf

CHINESE JOURNAL OF MECHANICAL ENGINEERING Vol. 22,aNo. 5,a2009 ·671 · DOI: 10.3901/CJME.2009.05.671, available online at ; Design System of the Two-step Gear Reducer on Case-based Reasoning 1, 2, * 1 1 3 JI Aimin , HUANG Quansheng , XU Huanmin , and CHEN Zhengming 1 College of Mechanical and Electrical Engineering, Hohai University, Changzhou 213022, China 2 State Key Lab of CADCG, Zhejiang University, Hangzhou 310058, China 3 College of Computer and Information Engineering, Hohai University, Changzhou 213022, China Received November 18, 2008; revised May 22, 2009; accepted August 10, 2009; published electronically August 14, 2009 Abstract: The design of the two-step gear reducer is a tedious and time-consuming process. For the purpose of improving the efficiency and intelligence of design process, case-based reasoning(CBR) technology was applied to the design of the two-step gear reducer. Firstly, the current design method for the two-step gear reducer was analyzed and the principle of CBR was described. Secondly, according to the characteristics of the reducer, three key technologies of CBR were studied and the corresponding methods were provided, which are as follows: (a) an object-oriented knowledge representation method, (b) a retrieval method combining the nearest neighbor with the induction indexing, and (c) a case adaptation algorithm combining the revision based on rule with artificial revision. Also, for the purpose of improving the credibility of case retrieval,