关键词: 数控, 规则数据库, 正则表达式, 词法分析, 语法分析, 代码解析, 规则定制

Abstract: Aiming at the problem of Numerical Control (NC) program interpreting in virtual machining sytem, the key techniques of general NC program interpreting was proposed. Based on the analysis of program patterns of different NC systems, a rule database was designed. The syntax analysis was performed based on regular expressions. The establishment methods for syntax rules, the syntax analysis algorithm and stack-calling-based subprograms processing were proposed as well. Then customization interfaces were put forward to extend an existing interpreter to other new NC systems. A general NC program interpreter was developed based on these techniques, which verified the validity of this proposed approach and provided technical support for realization of virtual machining system.

Key words: numerical control, rule database, regular expression, accidence analysis, syntax analysis, program interpreting, rule customization