电弧炉电极调节系统的离散时间自适应控制研究

Research on Discrete-time Adaptive Control of Electrode Regulator System of Arc Furnace

讨论了电弧炉电极调节系统的离散时间自适应控制问题。首先将电弧炉主电路的电弧弧长与电弧电流的非线性函数关系用分段线性函数表示,得出了电弧炉电极调节系统分段线性化的数学模型。在此基础上进行了电弧炉电极调节自适应控制系统的设计,推导出了递推的离散时间模型参考自适应律。仿真研究表明自适应控制系统具有良好的跟踪特性,并能够有效地抑制抖动,其性能明显优于PID控制系统,以上研究为新型电极控制系统的研制提供了新的方法。

In this paper, the discrete-time adaptive control of electrode regulator system of arc furnace is discussed. First, the nonlinear function relation that is between arc length and arc current of arc furnace main circuit is expressed with piecewise-linear function, and then a piecewise-linear model of electrode regulator system is presented. Based on this the design of arc furnace electrode regulator adaptive control system is made, the rule of discrete-time model reference adaptive control is proven. The results of simulation show that adaptive control has favorable tracking characteristic and capability of restraining dithering, and that the performance of adaptive system is much better than PID control system. The research provides a new method for developing new type electrode control system.