共查询到18条相似文献,搜索用时 125 毫秒
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结晶器液位机理模型及其在极限环抑制中的应用 总被引:4,自引:1,他引:3
针对结晶器液位极限环抑制中dither抖动参数难于确定的问题,建立了整个连铸机结晶器液位的机理模型,正确预测了液位控制中的极限环现象.以此模型为基础,提出了一种dither抖动参数工程整定方法. 相似文献
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本文主要运用涡流式传感器检测的连铸结晶器液位控制问题研究,文章简要叙述了电涡流传感器的工作原理、电涡流式传感器等效电路,通过电涡流传感器采集钢水液位的信号,构建了液位检测连铸结晶器系统控制系统的数学模型,分别构建了电涡流传感器模型、伺服电动机系统模型、塞棒流量特性模型、连铸结晶器模型,并用MATLAB软件下的组态Simulink进行仿真,经仿真表明,该算法可以很好地对结晶器实施控制,经过实际运行该算法是完全正确的、可行的、有效的。实验结果表明,该控制算法连铸结晶器液位控制效果良好。 相似文献
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李祖林 《计算机工程与应用》2009,45(10):199-201
针对传统的结晶器液位控制系统方案存在缺点,根据对象机理,比较了塞棒比例积分(PI)控制和拉速PI控制和对结晶器液位控制效果,分析了塞棒PI控制液位存在的问题,设计了基于径向基函数神经网络(RBFNN)的塞棒控制器和拉速补偿器。使用规则模型,研究了基于专家系统的塞棒和拉速控制液位的协调控制系统,解决了液位控制器切换存在的干扰。系统在MATLAB上进行了仿真,并在实际中进行了测试。实际测试结果表明该系统的液位控制精度、稳定性和动态响应优于传统的单回路控制方案。 相似文献
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模糊控制技术在连铸机结晶器液位控制中的应用 总被引:1,自引:1,他引:1
通过对连铸机结晶器液位控制系统的分析,介绍了模糊控制技术在结晶器液位控制中的应用和模糊控制规则的建立。实际应用表明该系统具有稳定性好、控制精度高、偏差小等特点。 相似文献
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介绍了一种基于PLC的钢水车模糊控制系统的设计方法。通过采集到的电机转速与设定的电机转速相比较后,以速度偏差及其变化量作为输入,通过模糊控制算法,使钢水车系统按照设定的最佳转速而运行,提高了控制精度和工作效率。 相似文献
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基于Qt的嵌入式GUI开发的应用研究 总被引:1,自引:0,他引:1
结合钢水液位检测系统人机界面开发的需求,简要说明了系统的开发平台,然后介绍了Qt及其图形库Qwt的特点,并详细描述了嵌入式GUI开发环境的搭建。最后介绍了钢水液位检测系统GUI中串口通信及图形绘制等关键部分的设计与实现。 相似文献
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During the continuous casting of steel, several disturbances occur and affect all the parts of the caster, including the mould where the molten steel has to be stable for good quality of the final product. Especially at high casting velocities, the bulging generates important level fluctuations which cannot be efficiently rejected by the classical controllers. To address these problems, this paper proposes an architecture combining disturbances estimation and compensation techniques. It operates as an additional module and does not need any change of the main controller currently implemented. The entire structure has been tested successfully through several simulations and by means of intensive water model experiments. 相似文献
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Zhizhong MAO 《控制理论与应用(英文版)》2009,7(1):81-86
In order to design an optimal controller for the thyristor controlled series capacitor (TCSC), a novel TCSC control model is developed. In the model, the delay angle of thyristor valves is the input, and the inductor current is chosen as the output. Theoretical analysis and simulation studies show that TCSC is a non-linear system and its parameters vary with the operating point. In consideration of the special characteristics of the TCSC, an improved model algorithmic control (1MAC) scheme is proposed to control TCSC effectively. The good performance can be observed from simulation results when IMAC is applied to a series compensated radial system. 相似文献
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The twin-roll strip casting process is a steel-strip production method that combines continuous casting and hot rolling process
in a single operation. The quality of strip casting process depends on many process parameters, such as molten steel level
in the tundish, solidification position and roll gap. Their relationships are complex and the strip casting process has the
properties of nonlinear uncertainty and time-varying characteristics. Hence, it is difficult to establish an accurate process
model for designing a model-based controller to monitor the strip quality. In this paper, a model-free control strategy is
employed to overcome this problem. The self-organizing fuzzy control (SOFC) strategy is developed to control the molten steel
level of a strip casting process. It has on-line learning ability and the rule tables can be modified automatically and continuously
for responding to the system’s nonlinear and time-varying behaviors. Since this model-free controller has simple control structure
and small number of control parameters, it is easy to implement. Simulation results based on semi-experimental system dynamic
model and parameters are executed to show the control performance of the proposed intelligent controller. 相似文献