改进的双电机虚拟总轴同步控制

传统虚拟总轴控制策略中扭矩反馈存在较大时滞,当负载发生扰动时,电机之间转速和位置同步误差会不断增大,导致产品质量下降。针对这一问题,提出了改进的双电机虚拟总轴同步控制策略。在改进策略中,为提高弹性扭矩的反馈速度,采用滑模观测器观测将观测的负载转矩直接反馈给虚拟电机;为减小电机之间的位置差,在虚拟机械单元引入积分项。仿真结果表明,改进的控制策略提高了系统应对负载突变的能力,有效减小了电机间转速和位置同步误差,具有一定的实用价值。

Improved dual motor synchronous technology of virtual shaft quality control

In the process of load disturbance, the traditional electronic virtual line shafting control strategy had a great error in the speed and position of motors due to the time lag of the virtual elastic torque feedback, which leads to the decrease of the quality of the produce. Aiming at this problem, It proposes an improved ELS control strategy. In this strategy, the sliding mode observer is designed to load torque, the observed load torque feedback to the virtual machine and feedforward compensation in real time; in order to reduce the position error of motors, the integral term is introduced in the virtual machine unit. Simulation results show that the improved ELS can improve the ability of paper transmission unit to deal with the load change, and effectively reduce the speed and position synchronization error of motors, and has a certain practical value.