基于精简并发潜结构映射的竖炉焙烧过程综合故障诊断

发布时间：2018-12-21 07:25

【摘要】：竖炉焙烧过程因运行条件异常变化或操作不当会造成上火、冒火、过还原和欠还原等运行故障.这些故障直接影响过程运行安全和产品质量(比如,磁选管回收率),但难以采用基于模型和基于知识的方法建模故障与产品质量的关系,以及诊断故障变量.针对上述问题,本文提出数据驱动的基于并发潜结构映射(Concurrent projection to latent structures,CPLS)的竖炉焙烧过程综合故障诊断方法.首先,将并发潜结构映射分解的过程变量共有子空间与残差空间精简合并来建立磁选管回收率相关的过程变化空间,提出基于精简并发潜结构映射模型的竖炉焙烧过程综合监控方法;接下来,定义相应的重构贡献图并与竖炉焙烧过程相结合,提出CPLS精简重构贡献方法用于竖炉焙烧过程故障变量诊断;最后,利用竖炉焙烧过程半实物仿真平台采集的数据进行实验研究,结果表明所提方法不仅可以诊断出质量相关的故障,而且可诊断出回路设定值之外的故障变量.
[Abstract]:Due to abnormal operation conditions or improper operation, shaft furnace roasting process will cause fire, ignition, overreduction and underreduction. These faults directly affect the process safety and product quality (for example, magnetic separator recovery rate), but it is difficult to use model-based and knowledge-based methods to model the relationship between fault and product quality, as well as to diagnose fault variables. In order to solve the above problems, a data-driven comprehensive fault diagnosis method for shaft furnace roasting process based on concurrent latent structure mapping (Concurrent projection to latent structures,CPLS) is proposed in this paper. Firstly, the process variables decomposed by the concurrent latent structure mapping are simplified and combined with the residual space to establish the process change space related to the recovery rate of magnetic separator. A comprehensive monitoring method for shaft furnace roasting process based on reduced concurrent latent structure mapping model is proposed. Then, the corresponding reconstruction contribution diagram is defined and combined with the shaft furnace roasting process, and the CPLS simplified reconstruction contribution method is proposed to diagnose the fault variables in the shaft furnace roasting process. Finally, by using the data collected from the semi-physical simulation platform of shaft furnace roasting process, the experimental results show that the proposed method can not only diagnose the quality-related faults, but also diagnose the fault variables other than the set values of the circuit.
【作者单位】：东北大学流程工业综合自动化国家重点实验室;美国南加州大学化工系;香港中文大学(深圳);
【基金】：国家自然科学基金(61673097,61304107,61490704,61573022) 深圳市科技计划项目(基20160207) 德克萨斯威斯康辛加利福尼亚控制联盟(TWCCC) 博士后国际交流计划派出项目(20130020) 中央高校基本科研业务费(N160804002,N160801001)资助~~
【分类号】：TD927

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