排序方式: 共有7条查询结果,搜索用时 15 毫秒
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本对CAPP系统进行了总体结构设计,详细地研究和介绍了系统的主要功能模块和数据库结构。本提出的换热器CAPP系统具有以下优点;面向企业具体生产环境和实际应用,能够很好地满足企业应用CAPP的要求;具有较强的工艺数据,生产和资源等管理功能;采用完全基于数据库的程序结构形式和开放的数据结构等特点。符合CAPP的发展方向。它的开发成功能够促进企业的技术进步,推动企业信息化的进程。取得良好的经济效益。 相似文献
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An integrated method for identifying the propagation of multi-loop process oscillations and their source location is proposed in this paper. Oscillatory process loop variables are automatically selected based on the component-related ratio index and a mixing matrix, both of which are obtained in data preprocessing by spectral independent component analysis. The complex causality among oscillatory process variables is then revealed by Granger causality test and is visualized in the form of causality diagram. The simplification of causal connectivity in the diagram is performed according to the understanding of process knowledge and the final simplest causality diagram, which represents the main oscillation propagation paths, is achieved by the automated cutting-off thresh-old search, with which less significant causality pathways are filtered out. The source of the oscillation disturbance can be identified intuitively through the final causality diagram. Both simulated and real plant data tests are presented to demonstrate the effectiveness and feasibility of the proposed method. 相似文献
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针对大型在役化工过程装置亚健康问题,提出一套基于实际操作过程参数及其内在联系分析,进行大型在役化工过程装置定量健康评估与故障源诊断的方法.该方法依据最小方差控制方法评估控制回路性能,基于双相干频谱非线性分析评估控制阀的性能,实现装置健康状态定量评估;采用功率谱独立源成分进行系统波动源分析,进而通过格兰杰因果检验确定波动故障传播路径和根源.给出有关理论和方法,并据此对大型氯乙烯装置进行健康评估和故障源定位,获得装置性能定量评估结果,确定异常控制回路、故障源及其传播路径.现场验证结果表明,评估结果能够较好地反映装置的实际情况. 相似文献
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