马钢中板轧机主传动晶闸管直流控制系统中原磁化曲线模拟器采用的是四段线性逼近的方法，而且拐点固定不变，因此模拟精度较低，从而使电动机进入高速区（弱磁区）后，控制系统产生了严重的振荡，其频率为1．2Hz。为此由北京科技大学与马鞍山钢铁股份有限公司合作对该系统进行 Masteel plate mill main drive thyristor DC control system Central Plains magnetization curve simulator uses a four-stage linear approximation method, and the inflection point is fixed, so the simulation accuracy is low, so that the motor into the high-speed zone (weak magnetic zone) The control system produced severe oscillations with a frequency of 1.2 Hz. To this end by the Beijing University of Technology and Maanshan Iron & Steel Co., Ltd. cooperation in the system