基于数据驱动的热连轧自动厚度系统的分布式控制
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1.硅湖职业技术学院;2.中国石油大学

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国家自然科学基金(青年基金)(6180517),国家油气重大专项(2017ZX05013-001)


Distribute control for automatic gauge control system of hot strip mills using data driven method
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The National Natural Science Foundation of China, Major national oil and gas projects

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    摘要:

    热连轧厚度控制系统是通过多机架协同压下实现带钢厚度控制的,是一类典型的多智能体系统。厚度控制系统之间具有较强的耦合影响,同时受到外部环境以及参数不确定性等因素的影响,难以建立精确的数学模型,控制性能有待进一步提高。针对热连轧厚度控制系统提出了分布式控制策略。采用子空间辨识方法,直接利用热连轧厚度控制系统检测得到的轧制力信息和液压缸位置信息设计分布式控制器,避开模型辨识过程,简化了控制器设计过程,与传统的分散式控制策略相比较,减轻了上游机架出口厚度偏差对下游机架轧制系统的影响,提高了机架间的协调性和控制精度。基于分布式控制策略,分析了厚度控制系统的稳定性,给出了系统稳定的充分条件。仿真结果证明了方法的可行性和有效性。

    Abstract:

    Automatic gauge control of hot strip mills is realized via multi stands work together cooperatively, which is a typical multi-agent system, where the coupling effects among the automatic gauge control systems are strong. Duo to the parameter uncertainty and inevitably affected by external environment, it is hard to establish the accurate model of automatic gauge control system to improve the control performance. The paper considers a distribute control strategy of multi-agent automatic gauge control system of hot strip mills based on data driven control. The subspace identification technique is employed to formulate the distributed controller using the information of roll force and cylinder position. With the proposed control strategy, model identification processes is left out, and the effects of exit thickness deviation from upstream automatic gauge control systems can be reduced effectively, and both the cooperation of automatic gauge controllers and control precision are improved. Furthermore the sufficient condition for stability of the systems with the distribute control strategy is presented based on the proposed control strategy. Simulation results are used to verify the feasibility and effectiveness the proposed control strategy and corresponding results.

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  • 收稿日期:2018-10-31
  • 最后修改日期:2019-01-19
  • 录用日期:2023-09-08
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