华电技术 ›› 2012, Vol. 34 ›› Issue (1): 28-29.

• 研究与开发 • 上一篇    下一篇

分散控制系统SOE模件时间累计误差消除方法

吴胜华,田海波   

  1. 国电南京自动化股份有限公司研究院,江苏南京210003
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2012-01-25 发布日期:2012-01-25

An approach for eliminating accumulative error of SOE module in DCS

WU Shenghua, TIAN Haibo   

  1. Research Institute of Guodian Nanjing Automation Corporation Limited, Nanjing 210003, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2012-01-25 Published:2012-01-25

摘要: 由于时钟振荡器的脉冲受环境温度、激励电平等不稳定因素的影响,时钟难免存在误差,因程序复杂,这种影响是持续随机的,短时很难消除。提出了一个实际可行的分散控制系统事件顺序记录模件模拟时钟累计误差的校正方案,并进行了详细分析,该方案能够显著减小累积误差,提高精度。

关键词: 分散控制系统, 事件顺序记录, 累计误差, 精度

Abstract: Due to the influence of the temperature, the excitation level and other instability factors on the frequency of the clock oscillator, it is difficult to avoid the error of the system clock. Because of the complexity of the program, this influence is continuous and random; and it is difficult to eliminate this influence in short time. A realistic corrective method for the accumulative error of analog clock of SOE module in DCS was put forward and analyzed in detail. The method can reduce the accumulative error and enhance the accuracy significantly.

Key words: distributed control system (DCS), sequence of event (SOE) record, accumulative error, accuracy