三相电弧炉电极调节控制系统的鲁棒自适应控制

讨论了基于反馈线性化的鲁棒控制方法在在非线性系统控制中的应用.应用基于微分几何的反馈线性化方法将单相电极调节系统等价为完全可控线性系统,考虑三相耦合及弧长扰动的影响,设计了鲁棒自适应控制器,进行了MATLAB仿真.结果表明,基于反馈线性化鲁棒控制方法,可以有效克服三相耦合和弧长扰动的影响,在电弧炉电极调节系统控制中有一定的潜力.     

电弧炉电极调节系统模糊自适应PID控制器设计

电弧炉炼钢系统是一个非线性、强耦合、多变量的系统,采用传统的PID控制很难取得理想的控制效果。基于恒阻抗控制策略,运用模糊数学的基本理论和方法设计模糊自适应PID控制器,该控制器可实时调整PID参数,使电极调节系统工作在最佳状态。仿真结果表明控制器能够有效地调节电极的升降,将电弧的弧长控制在期望值,可有效降低能耗,提高炼钢产品质量。     

电弧炉电极调节系统的模糊控制

分析了电弧炉电极调节系统的非线性与三相耦合特征。采用了电路网络来模拟电弧炉主电路的非线性。在此基础上，针对控制对象的复杂性，采用模糊控制方法来对其进行控制，并用遗传算法对模糊规则进行了优化。采用Matlab6．5对电弧炉电极调节系统进行了模糊控制与传统PID控制的仿真。仿真结果表明：与PID控制比较，采用遗传算法优化后的模糊控制的控制效果是令人满意的。为电弧炉的控制提供了数字仿真支持。     

电弧炉电极调节控制器的设计与仿真

介绍了电弧炉电极调节系统的工艺概况,并给出了系统的数学模型。在MATLAB6．5环境下,通过编写和调试M文件,对电弧炉电极调节系统PD控制器进行设计与仿真。结果表明,基于MATLAB的仿真研究,能够直观、简便、快捷地设计出性能优良的控制器。     

增益调节用模糊PID研究控制

本论文将介绍PID控制器中实现最佳增益调节的一种新方法。此方法首先对控制对象阶跃响应的一阶延迟模型进行Pade阶阶处理,然后用Ziegler-Nichols方法确定初始值,接着计算含有最大超调量、衰减比、上升时间、稳定时间的模糊推理函数值为最大时的PID系数。此方法的优点是：对控制对象的特性和滞后时间的变化具有较好的适应能力。     

增益调节用模糊PID研究控制

本论文将介绍ＰＩＤ控制器中实现最住增益调节的一种新方法。此方法首先对控制对像阶跃响应的一阶延迟模型进行Ｐａｄｅ降阶处理,然后用 Ｚｉｅｇｌｅｒ－Ｎｉｃｈｏｌｓ方法确定初始值,接着计算含有最大超调量、衰减比、上升时间、稳定时间的模糊推理函数值为最大时的ＰＩＤ系数。此方法的优点是：对控制对像的特性和滞后时间的变化具有较好的适应能力。     

利用定量反馈理论的PID控制器设计

定量反馈理论是目前鲁棒控制领域中具有较强工程实用价值的一种设计方法，而PID控制器由于其算法简单、鲁棒性好和可靠性高，因而成为应用最为广泛的控制器．本文中介绍了利用定量反馈理论设计的PID控制器，并对两自由度控制结构系统进行了数值仿真，验证了控制器的有效性．     

PID控制规律教学方法探讨

PID控制被广泛应用于生产过程的各种领域。本详细分析了PID控制器的基本作用，并运用CAE2000对一典型的单回路系统进行仿真，得出几个重要结论。     

单片机直流电弧炉电极调节控制系统

提供了双ＣＰＵ单片机结构在直流电弧炉电极调节器中的应用,介绍了系统的硬件、软件及控制算法．     

Modeling of electrode system for three-phase electric arc furnace

To simulate the process of electrode operation, a dynamic model describing the electrode system of three-phase electric arc furnace was developed. This new model can be divided into three submodels in terms of the practical situation. They are the power supply system model the electric arc model and the hydraulic actuator system model. According to the basic circuit theory, the power supply system model where the high voltage transmission circuit and mutual inductances were considered, was set up. The electric arc model, which was novel for the electrode control, served as the electrical load and was connected to the power supply system model. The hydraulic actuator system model consists of the proportional valve part that is modeled to capture the dead-zone nonlinear characteristics and the hydraulic cylinder part where the impact of the load force is taken into account. By comparing simulation data and actual data, the results show that the electrode system model is proved to be accurate.     

大型电弧炉计算机控制系统

介绍了大型电弧炉计算机控制系统的结构，主要功能及工作原理，并就系统软件ＡＭＸ及控制算法进行了讨论。     

Arc deflection model and arc direction control for DC arc furnace

Based on the analysis of three-dimensional power conductor for DC arc furnace, the electric arc deflection model was set up and the control system of the arc direction was configured. According to the bus bar distribution at the bottom electrodes cooled by water, the arc direction control principle and its configuration were described, The simulation results show that the control system can restrain the electric arc deflection and control the arc direction.     

电弧炉的间接自适应模糊鲁棒控制

针对三相电弧炉电极调节系统的电极控制问题,设计了自适应模糊鲁棒控制器,给出了模糊鲁棒控制系统的详细设计过程.该方法考虑了跟踪误差和逼近误差对参数自适应律的影响,并对模糊逼近误差和外扰采用H∞补偿控制.仿真结果表明:该控制算法具有较好的动态响应和稳态控制精度,对外界干扰及结构参数不确定性具有很强的鲁棒性.     

Neural adaptive PSD decoupling controller and its application in three-phase electrode adjusting system of submerged arc furnace

Taking three-phase electrode adjusting system of submerged arc furnace as study object which has nonlinear, time-variant, multivariable and strong coupling features, a neural adaptive PSD(proportion, sum and differential) dispersive decoupling controller was developed by combining neural adaptive PSD algorithm with dispersive decoupling network. In this work, the production technology process and control difficulties of submerged arc furnace were simply introduced, the necessity of establishing a neural adaptive PSD dispersive decoupling controller was discussed, the design method and the implementation steps of the controller are expounded in detail, and the block diagram of the controlled system is presented. By comparison with experimental results of the conventional PID controller and the adaptive PSD controller, the decoupling ability, adaptive ability, self-learning ability and robustness of the neural adaptive PSD dispersive decoupling controller have been testified effectively. The controller is applicable to the three-phase electrode adjusting system of submerged arc furnace, and it will play an important role for achieving the power balance of three-phrase electrodes, saving energy and reducing consumption in the process of smelting.     

微机变频电弧炉电极调节器

介绍了微机控制变频电弧炉电极调节器的系统结构，工作原理及模糊控制算法。     

Mathematical Model on heat transfer of water—cooling steel—stick bottom electrode of DC electric arc furnace

For predicting and controlling the melted depth of bottom electrode during the process of steelmaking,the water-cooling steel stick electrode is taken as an example.to analyze the process of heat transfer,then 3D mathematical model by control capacity method is built.At the same time,the measurement on the melted depth of bottom electrode is conducted which verified the correctness of the built mathematical model.On the base of verification,all kinds of key parameters are calculated through the application and a series of results are simulated.Finally,the optimum parameters are found and the service life of bottom electrode is prolonged.