双感应电机驱动振动筛的控制同步研究

Research on controlled synchronization of vibrating screen driven by two induction motors

以振动同步方式作为工作机理的振动筛在社会产生中已不能满足工艺需求,通过引入控制方法来实现零相位差状态,实现增加振幅的目的。根据机械动力学理论将振动筛的运动状态转化为双机驱动振动系统动力学模型,对振动系统实现同步运动的同步性条件和稳定性条件进行推导和分析;整体基于主从控制策略,采用模型预测磁链控制策略设计了单台感应电机的转速控制器,在单神经元PID控制中引入前馈控制,设计了相位控制器来实现两偏心转子零相位差状态;根据动力学模型在Matlab/simulink中搭建仿真模型,通过仿真表明提出的控制策略、方法是有效的,并具有稳定性;将提出的控制方法与其他控制方法进行仿真比较,结果表明该控制方法的同步控制效果更好,快速性更好。

The vibrating screen with vibration synchronization as the working mechanism can no longer meet the process needs in the social generation,so the control method is introduced to achieve the zero phase difference state and achieve the purpose of increasing the amplitude.According to the mechanical dynamics theory,the motion state of the vibrating screen is transformed into the dynamic model of the two-machine drive vibration system,and the synchronization conditions and stability conditions of the synchronous motion of the vibration system are derived and analyzed.Based on the master-slave control strategy,the speed controller of a single induction motor is designed by using the model predictive flux control strategy,the feedforward control is introduced into the single-neuron PID control,and the phase controller is designed to realize the zero phase difference state of the twoeccentric rotor.According to the dynamic model,the simulation model is built in Matlab/Simulink,and the simulation shows that the proposed control strategy and method are effective and stable.The proposed control method is compared with other control methods,and the results show that the synchronous control effect of the proposed control method is better.