数控自动编程专家系统

本文简要地介绍了数控自动编程专家系统.其中包括:专家系统知识表示的形式;分层次的黑板结构;前向推理求解策略和相应的解释功能;系统针对不同类型的曲线组合,采用不同的独立的知识源(KS)进行处理.由于在知识的处理上采用编码技术,在前向推理求解策略中使用启发信息和“剪技”技术,提高了系统的时空效率.系统中的规划程序能自动规划切削路径.输出供数控车床使用的 NC 代码,并可在显示屏上进行图形显示和切削仿真.目前原型系统已经在 IBM-PC 和 Sun3/60计算机上利用FORTRAN 语言实现.

<div> This paper introduces briefly an expert system on numerical control automatic programing,including <span style="font-size: 12px;">knowledge representation,blackboard architecture with different levels,problem solving strategy,forward </span><span style="font-size: 12px;">reasoning and interpreter.A set of knowledge sources is adopted to deal with different combination of </span><span style="font-size: 12px;">curves.Because of using coding technique on knowledge processing, heuristic search and pruning technique, </span><span style="font-size: 12px;">the time and space efficiency is highly improved.The planning program of the system can produce cutting </span><span style="font-size: 12px;">path automatically,give NC code output executed by NC lathe,display graph of parts and simulate cutting </span><span style="font-size: 12px;">action.At present,the prototype system written by FORTRAN has been running on IBM/PC and </span><span style="font-size: 12px;">SUN3/60 computer.</span></div>

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