MIPS-Ⅲ架构的数控系统实时性能评估方法研究

Research on the Real-time Performance Evaluation Method of MIPS-Ⅲ Architecture CNC System

为了评估和优化基于国产MIPS处理器的PC型数控系统的实时性和稳定性,结合数控系统和实时系统的特点,从事件延迟和周期抖动两个影响实时系统时间特性的关键因素出发,提出一套评估基于MIPS的PC型数控系统实时性能和稳定性能的关键指标分析方法 CNC-KDE(CNC-Key Department Evaluation),该方法包含了评估的关键指标选取、关键指标实验数据采集方法、关键指标实验数据的数理统计分析方法.最后根据关键指标分析结果对数控系统的实时性能和稳定性能进行综合的评估.文中还介绍了该方法应用于原型机数控系统的评估实验,实验结果表明CNC-KDE方法能对基于MIPS架构的PC型数控系统的实时性能和稳定性可以进行准确有效的分析和评估.

To evaluate and optimize the stability and real-time performance of the PC-CNC system based on the indigenous MIPS pro- cessor, this paper proposed an key indicator analytical method CNC-KDE { CNC key Department Evaluation I starting with event delay and period jitter which are both key characteristics that affect the time feature of an real-time system. In the method, the critical fac- tors＂ selection, the data acquisition of key indicators and mathematical statistics on experimental information are contained. At last the stability and real-time performance of CNC system due to the analysis of critical factors are also evaluated by the data analysis approa- ches in the method CNC-KDE. The evaluation experiment in which such analytical method is adopted in the prototype machine CNC system is introduced. The result indicates that the real-time performance and stability based on the MIPS architecture PC-CNC system can be analyzed and evaluated efficiently and accurately by the method CNC-KDE.