| 孔令仲,王浩,雷晓辉,权锦,杨迁.基于线性预测控制算法的明渠实时控制研究[J].水利学报,2020,51(3):326-334 |
| 基于线性预测控制算法的明渠实时控制研究 |
| Research on real-time control of open canal based on linear predictive control method |
| 投稿时间：2019-07-18 |
| DOI：10.13243/j.cnki.slxb.20190505 |
| 中文关键词: 渠道实时控制 线性控制模型 预测控制算法 线性二次型最优控制 |
| 英文关键词: canal real-time control linear control model model predictive control linear quadratic optimal control |
| 基金项目:水体污染控制与治理科技重大专项课题（2017ZX07108001）；国家自然科学基金项目（51779268） |
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| 中文摘要: |
| 针对纵坡较缓、渠池槽蓄量大且完全处于回水区的大型串联渠池中的水位控制问题，本文以南水北调中线工程最后6级渠池为研究对象，通过建立多级串联渠道的离散线性状态空间方程，设计用于多级串联渠池的线性预测控制算法，并采用低通滤波器对控制算法中需要用到的实时水位观测信息进行处理。研究结果表明采用低通滤波处理后的水位信息进行实时控制时能够消除没有明显回水区渠池中发生的水位波动，达到稳定控制的效果。在分水不可预知情况，预测控制算法起到集中反馈控制的效果，控制效果与线性二次型最优控制的控制效果类似；而在分水可预知情况，预测控制算法能提前于分水变化进行闸门控制，起到前馈控制的作用，进一步优化控制效果。 |
| 英文摘要: |
| Aiming at the problem of water level control in large-scale multi-cascaded canal system with pools of small longitudinal slopes, large volume and completely under backwater, a linear model predictive method is designed based on a discrete-time linear state space equation and the low pass filters are applied to process the water level information collected in the control method. The performance of the method is tested on a simulation model of the last six pools of the Middle Route Project of the South-to-North Water Transfer Project. The results show that the automatic control of the water level signal processed by low-pass filter can eliminate the water lever fluctuations which may occur in the canal pool where the backwater area is not obvious, and achieve the effect of water level stability control. When the offtake flow changes are unpredicted,the control effect of the model predictive control is similar to the control effect of linear quadratic regulator, both control method serve as centralized feedback controllers. While in the case of predictive offtake flow changes,the model predictive control method can control the gate in advance and play the role of feed-forward control to further optimize the control effect. |
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