| 汽提塔塔底氨含量的软测量模型 |
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| 引用本文： | 冯大春. 汽提塔塔底氨含量的软测量模型[J]. 辽宁工程技术大学学报(自然科学版), 2011, 30(2): 300-303 |
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| 作者姓名： | 冯大春 |
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| 作者单位： | 仲恺农业工程学院,计算机科学与工程学院,广东,广州,510225 |
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| 基金项目： | 国家自然科学基金资助项目(20976204,20536020) |
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| 摘 要： | 针对常规偏最小二乘算法(PLS)难以适用实际工业过程的时变特性、固定长度窗口PLS可能导致数据样本丢失信息问题,提出了基于变滑动时间窗口长度的PLS软测量建模算法。算法思想是设定时间窗口内样本数据长度不是固定的,建模的样本数据随新样本数据加入而逐步舍去。算法应用于煤气化废水处理流程中加压汽提塔塔底氨含量的工业软测量建模,仿真研究表明:相对于简单的PLS方法和固定滑动时间窗口长度的PLS方法,模型的预测平均相对误差分别减少约43%及13%,模型具有精度高、外推能力好等优点。另外,针对案例,讨论了最佳的窗口可变长度。
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| 关 键 词： | 软测量 变长度滑动时间窗 偏最小二乘 汽提塔 氨含量 |
Soft-sensor model for NH_3 concentration at stripper bottom |
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| FENG Dachun. Soft-sensor model for NH_3 concentration at stripper bottom[J]. Journal of Liaoning Technical University (Natural Science Edition), 2011, 30(2): 300-303 |
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| Authors: | FENG Dachun |
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| Affiliation: | FENG Dachun(College of Computer Science and Engineering,Zhongkai University of Agriculture and Engineering,Guangzhou 510225,China) |
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| Abstract: | Soft-sensor model based on traditional partial least squares(PLS) method is difficult to be updated with the changes of industrial process,and moving windows PLS with fixed length are also subject to missing information in sample data.A modeling method based on the moving windows PLS with varied length is proposed in this paper.In the proposed algorithm,the length of the sample data in time window is not fixed,and the old sample data are discarded when new sample data are added.Application in predicting the... |
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| Keywords: | soft-sensor moving windows with changed length PLS stripper NH3 concentration |
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