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冷带轧机速度控制系统建模、仿真及控制研究
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摘要
本课题结合上海宝山钢铁公司“冷连轧机轧制过程动态仿真及控制优化”项目,完成冷带轧机速度控制系统的建模、仿真实际课题,并对速度控制进行理论研究。该项研究对冷连轧机设备的改造和产品质量的分析具有较强的实际意义,该项技术国外也正在研究,国内刚刚起步,因此本研究课题具有一定的先进性。
     本文根据速度控制系统电气原理图,建立了各机架速度控制系统的机理模型,并计算了其参数。然后,在利用Matlab对速度系统仿真基础上,转换到MATRIX仿真软件平台,分别对单机架速度控制系统,单机架速度、张力、压下、形变控制系统,五机架速度、张力、压下、形变整个控制系统进行了仿真。仿真研究表明所建立的各机架速度控制系统的模型和参数是正确的,仿真精度较高。这也为整个冷连轧机轧制过程动态仿真项目的顺利完成提供了保证。
     在完成实际项目基础上,文中还对冷带轧机速度控制系统进行了理论研究,提出了采用状态观测器重构轧制负载扰动,并设计了负载扰动前馈补偿控制器。最后,针对常规速度控制系统中弱磁调速所引起的参数变化设计了鲁棒控制器。仿真结果表明所设计的控制器是可行的。
Based on Shanghai Bao Steel Co. practical project, which is establishing modek simulating of dynamic roll procedure and control optimizing for cold continuing roll mill, the paper finished the speed system of it and research on speed control system from theory. The research is useful and helpful to cold roll mill instrument reform and analyze the quality of the products. The foreign is researching the technology and domestic is just beginning, so it is advanced to do the research on the paper.
    According to analysis of the electric theoretical of speed system, five mills' mechanism model of it is first established and parameters are computed. After succeeding in doing simulation with Matlab, the model is simulated through Matrix software. It include two parts, single mill and multi-mills. They both are separated into four parts, which are speed system, tension system, stress system and shape change system. The result of simulation the model and parameters are correct. It ensure the whole p'roject being finished successfully.
    On the base of finishing the practical project, it comes out a state observer to make up the load disturb and load disturb fore-feedback compensation controller. At last, because the decreased excitation to adjust speed will change the motor control parameters, it designs a robust controller. The result of simulation shows the theory method is correct.
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