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针对轧机轧辊反复正反转咬钢抛钢受到突然强有力的冲击时扭振现象极为严重的情况,研究采用扭矩无线传感器实时采回负载干扰值,解决了现有的扭振抑制方法中采用扭振预估器计算扭振时容易出现偏差的问题;利用前馈能在扰动发生时提前做出干扰补偿的原理,在大型轧机交交变频调速系统定子转矩电流与转速双闭环的基础上,在转矩控制器的输入端加入负载扭矩扰动补偿,提前控制定子电流转矩分量而达到控制扭振的目的,并用Simulink对上述过程进行仿真。结果表明:基于无线传感的扭振前馈抑制方式对扭振的控制效果非常明显,几乎可以彻底消除扭振,更贴近实际。
In view of the situation that the torsional vibration is extremely serious when the rolling of the steel is repeatedly and positively reversed by the rolling roller, the torsional vibration is extremely serious when the steel is abruptly and strongly shocked. The torque disturbance of the load is solved by using the torque wireless sensor in real time, Vibration predictor to calculate the torsional vibration prone to deviation problem; the use of feedforward in disturbances in advance to make the principle of interference compensation, frequency conversion in the large mill inverter stator flux current and speed double closed-loop basis, The load torque disturbance compensation is added to the input of the torque controller to control the stator torque component in advance to achieve the purpose of controlling the torsional vibration. Simulink is used to simulate the above process. The results show that the torsional vibration feedforward control method based on wireless sensor is very effective in torsional vibration control, which can eliminate the torsional vibration almost completely and is more practical.