| 基于二阶段自适应多模型的聚合釜温度控制 |
| 王振雷1, 毛福兴1, 王昕2 |
| 1. 华东理工大学 化工过程先进控制和优化技术教育部重点实验室, 上海 200237; 2. 上海交通大学 电工与电子技术中心, 上海 200240 |
| Temperature control of an acrylonitrile polymerization kettle using multiple models with second level adaptation |
| WANG Zhenlei1, MAO Fuxing1, WANG Xin2 |
| 1. Key Laboratory of Advanced Control and Optimization for Chemical Processes of the Ministry of Education, East China University of Science and Technology, Shanghai 200237, China; 2. Center of Electrical and Electronic Technology, Shanghai Jiao Tong University, Shanghai 200240, China |
摘要:
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| 摘要针对丙烯腈聚合过程的强时滞和较大参数不确定等特性，该文提出一种基于二阶段自适应多模型的广义预测控制方法。该方法首先根据系统的参数范围，建立多个自适应模型，应用最小二乘算法分别进行参数估计。再利用各自适应模型的参数估计值和预报误差计算模型的权值，将各参数估计值加权求和得到最终参数估计值。将该参数估计值作为参数的真值，利用广义预测控制算法确定各时刻的控制作用。仿真结果显示：该方法能使系统未知参数快速收敛到真值，同时系统的动态性能和对理想温度的跟踪精度较常规多模型自适应控制有明显的提高。 | |||
| 关键词 ：多模型,二阶段自适应,广义预测控制,聚合釜,自适应控制 | |||
| Abstract：A generalized predictive control method was developed from multiple models with second level adaptation for temperature control the acrylonitrile polymerization process which has long time delays and large parameter uncertainties. Several adaptive models are designed for the system parameter ranges with the parameters estimated by a recursive least squares algorithm. Then, the model weights are calculated based on the parameter estimates and the prediction error of each model. Then, the parameter estimates are used as the true values of the parameters to determine the control action via the generalized predictive control algorithm. Simulation results show that this method enables a system with unknown parameters to quickly converge to the true value. The system performance of the system and the tracking accuracy of the ideal temperature are significantly improved compared with conventional multiple model adaptive control. | |||
| Key words：multiple modelssecond level adaptationgeneralized predictive controlpolymerization kettleadaptive control | |||
| 收稿日期: 2015-08-25 出版日期: 2016-07-22 | |||
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| 基金资助:国家自然科学基金面上基金资助项目（21376077）；国家自然科学基金优秀青年基金资助项目（61222303）；上海市自然科学基金资助项目（14ZR1410000，14ZR1421800）；上海市重点学科建设基金资助项目（B504）；流程工业综合自动化国家重点实验室开放课题基金资助项目（PALN201404） | |||
| 引用本文: |
| 王振雷, 毛福兴, 王昕. 基于二阶段自适应多模型的聚合釜温度控制[J]. 清华大学学报（自然科学版）, 2016, 56(7): 707-716. WANG Zhenlei, MAO Fuxing, WANG Xin. Temperature control of an acrylonitrile polymerization kettle using multiple models with second level adaptation. Journal of Tsinghua University(Science and Technology), 2016, 56(7): 707-716. |
| 链接本文: |
| http://jst.tsinghuajournals.com/CN/10.16511/j.cnki.qhdxxb.2016.24.023或 http://jst.tsinghuajournals.com/CN/Y2016/V56/I7/707 |
图表:
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| 图１ 丙烯腈聚合反应工艺流程示意图 |
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| 图２ MMSLA 控制结构 |
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| 图３ 噪声方差为σ２＝０．０１系统仿真的输出 |
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| 图５ 噪声方差为σ２＝１时系统的仿真输出 |
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| 图６ 噪声方差为σ２＝１时参数辨识 |
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| 图４ 噪声方差为σ２＝０．０１时参数辨识 |
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