这里电加热炉随着科学技术的发展和工业生产水平的提高，已经在冶金、化工、机械等各类工业控制中得到了广泛应用，并且在国民经济中占有举足轻重的地位。对于这样一个具有非线性、大滞后、大家可以-Electric heating furnace here along with scientific and technological development and industrial production level, has been in the metallurgical, chemical, machinery, etc. in various kinds of industrial control has been widely applied, and in the national economy occupies a decisive position. For such a non-linear, large time delay, we can