【作者】 王宇名；

【导师】 张伟； 王益群；

【作者基本信息】 燕山大学 ， 机械电子工程， 2012， 硕士

【摘要】 轧机控制系统的调试是轧机设计中不可或缺的手段。它的设计是基于控制对象数学模型的，这种方案设计出的控制系统直接应用在轧机上，效果不好，到现场以后还需要反复的加以调试修改甚至重新设计，这样就增加了调试的周期和成本，因此能否使仿真和测试实际应用效果两者更加接近，缩短调试周期，降低成本，提高效率就成了关键。本文尝试借助DSPACE硬件在回路仿真平台来实现对轧机控制系统的实时测试。平台中控制系统部分采用实物控制器，并借助DSPACE实时仿真计算机实时运行控制对象模型来虚拟出一台轧机，实现对轧机控制系统实时的闭环测试。首先建立了完整的单机架可逆轧机数学模型，主要包括了液压压下系统、速度系统和张力系统三部分。液压压下系统中在考虑了电液伺服阀的非线性和不对称性、伺服油缸和轧机辊系机架变形的基础上建立了一个简化的二自由度的轧机压下系统模型适用于实时系统的快速计算；建立了电流速度双闭环的速度调节系统模型；结合带钢的前后滑值、实际轧制速度等情况，建立了单机架开卷取张力系统模型。最终将三个系统通过轧制力模型耦合在一起离线仿真，并分别对模型进行了仿真验证。接下来详细介绍了DSPACE软硬件系统及硬件在回路仿真技术，分析了轧机硬件在回路仿真平台的原理及逻辑上的可行性和可实施性，并设计了轧机硬件在回路仿真的平台，总结了轧机硬件在回路仿真的设计步骤。最后以燕山大学300实验轧机为对象搭建了轧机控制系统的硬件在回路仿真平台。通过进行仿真实验，验证了实验平台的可行性、轧机控制系统的有效性以及模型的正确性。这种方法可以为以后新建轧机控制系统提供一种更接近实际的调试方案。更多还原

【Abstract】 The simulation debugging of the mill’s control system is an experiment，which isestablished on the control system model. It is a necessary method in the design of mills.Such a control system designed by the program is applied directly to a mill, whose effectis not very good. When used in factory, it needs repeatedly debugging and modifying, oreven redesigning, which increases the cost of debugging. Therefore, whether the effect ofthe simulation and practical application can be more similar, it is critical to shorten thedebugging cycle, reduce costs and improve efficiency. In this paper, the DSPACEhardware in-the-loop simulation platform is made use of to achieve test on mill controlsystem. The practical controller is applied to the control system in the platform. Controlobject model with the help of the DSPACE real-time simulation computer’s real-timerunning designs a real-time mill closed-loop simulation system.First, this paper formulates a complete single-stand reversing mill mathematicalmodel. And it consists of the hydraulic pressure system, the speed system and tensionsystem. A simplified 2-DOF (degree-of-freedom) mill pressure system model isestablished on the basis of the nonlinearity and asymmetry of the electro-hydraulic servovalve, servo cylinder and mill deformation. Meanwhile, the current speed double closedloop speed regulation system model is also set up. Besides, taking into account theforward and backward slid values and the actual rolling speed of the strip steel, onesingle-stand unwrapping and coiling-up system tension model is built in this paper. Finally,offline simulation is developed after the three systems are coupled together by the rollingforce model.Second, this paper gives a detailed account of DSPACE hardware and softwaresystems, and also hardware-in-loop simulating technology. At the same time, the principleof the mill hardware-in-the-loop simulation platform is presented by the logical andpractical analysis. Moreover, the text summarizes the normal procedures of thehardware-in-loop simulation.Finally, this paper takes Yanshan University laboratory mill as the subject, hardware in-the-loop simulation platform is built, and meanwhile it proves the feasibility of theexperimental platform, which provides a more practical debug scenario to new-built millcontrol systems in future.更多还原