Planar Linkage Scale Expert System

The Mainframe, knowledge base and reasonillg machine of expert system for dimension synthesis ofplanar linkage mechanism(ESDSPLM), dimension synthesis methods and simulation of design result arestudied in this dissertation.Through the study of expert system construction theory and technology, mainframe of the ESDSPLMis built. By using of the dialog box nesting technology, the design wizard is created, which can guide userto colmplete thc data input step by step. The usage of the design wizard make the ESDSPLM possess offriendly interface.Based on the model of Microsoft Data Access Object(DAO) and the technology of Object-Orientdatabase, the knowledge base of the ESDSPLM is constructed. The Manage system of knowledge base isbuilt, which call maintain rule in the knowledge base. Though studying dimension synthesis methodssystematically, mnore than forty rules are concluded, which are the base of reasonable dimension synthesis.The method base class is established, which gathers a lot of synthesis methods,include analyticmethod, optimum method, characteristic parameters method, etc. The six-link, four-link and slide-crankmechanisms for function, path and motion generation can been synthesized by use of these methods. Thenumerical atlas of four-link is cleated, which include more than 3,0000 records. At same time Ule atlasmanagement systenl is created.The post processing module is the import part of the ESDSPLM, by which user can obtain andsimulate design result. At last the performance parameters are displayed in the mainframe.By integrating relative function, a platform for dimension synthesis is offered. Friendly interface,easily operation, high automatic level and elementary reasoning ability are the characters of theESDSPLM. So, the expert system occtupy a high value of application.With the tool of Visual C＋＋6.0, the ESDSPLM is achieved through programming on the Windows 98platform. Many kinds of dilnension synthesis examples are given in order to explain the use of theESDSPLM.