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工业监测控制系统中的实时数据库研究和设计
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作者 孙洁 《深圳信息职业技术学院学报》 2006年第1期4-8,共5页
本文针对常规关系型数据库系统在工业监测控制实时应用中存在的缺陷,提出了将实时技术和传统的数据库技术相结合的方法,通过实例分析了一个实用的监控系统中实时数据库系统的构成与分类, 提出了监控系统的实时数据库模型,并对其体系结... 本文针对常规关系型数据库系统在工业监测控制实时应用中存在的缺陷,提出了将实时技术和传统的数据库技术相结合的方法,通过实例分析了一个实用的监控系统中实时数据库系统的构成与分类, 提出了监控系统的实时数据库模型,并对其体系结构、系统特色、C/S访问控制、I/O访问控制、分布式机制等方面进行了探讨. 展开更多
关键词 工业监测控制 实时数据库 分布式体系结构
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Hellinger distance based probability distribution approach to performance monitoring of nonlinear control systems 被引量:2
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作者 李晨 黄彪 钱锋 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2015年第12期1945-1950,共6页
Control performance monitoring has attracted great attention in both academia and industry over the past two decades. However, most research efforts have been devoted to the performance monitoring of linear control sy... Control performance monitoring has attracted great attention in both academia and industry over the past two decades. However, most research efforts have been devoted to the performance monitoring of linear control systems, without considering the pervasive nonlinearities(e.g. valve stiction) present in most industrial control systems. In this work, a novel probability distribution distance based index is proposed to monitor the performance of non-linear control systems. The proposed method uses Hellinger distance to evaluate change of control system performance. Several simulation examples are given to illustrate the effectiveness of the proposed method. 展开更多
关键词 Control performance monitoring Kernel density estimation Hellinger distance Nonlinear system
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Commissioning Status of NSLS-II Vacuum Control System
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作者 Huijuan Xu Hsiao-chaun Hseuh Shuwei Leng Douglas T Zigrosser 《Journal of Physical Science and Application》 2015年第2期123-127,共5页
The NSLS-II (National Synchrotron Light Source II) is a state-of-the-art 3 GeV third generation light source currently under integrated testing and commissioning at Brook_haven National Laboratory. The vacuum system... The NSLS-II (National Synchrotron Light Source II) is a state-of-the-art 3 GeV third generation light source currently under integrated testing and commissioning at Brook_haven National Laboratory. The vacuum systems are monitored by vacuum gauges and ion pump current. The gate valves are controlled by PLC (programmable logic controllers) using voting scheme. EPICS (Experimental Physics and Industrial Control System) application codes provide the high level monitoring and control through the input-output controllers. This paper will discuss the commissioning status of the various aspects of vacuum control system. 展开更多
关键词 NSLS-II VACUUM control system commissioning status.
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