气动巨量转移机构刺晶减振控制

Here, aiming at the problem of transfer accuracy affected by torsional vibration of crossbeam in highspeed and high-frequency crystal-piercing process of pneumatic needle punching type massive transfer mechanism, a dual-side hanging linear motor active vibration reduction scheme based on the dynamic balance method was proposed. A mathematical model for amplitude of crossbeam torsional vibration was established based on the synchronous reverse motion of needle punching system and follow-up system, and the transient analysis of motion process was performed using finite element method. Back propagation - process identifier (BP-PID) method was used for current control and adjusting parameters of linear motor to improve convergence speed of current function, reduce overshoot of starting current, and optimize the control method of motor thrust. Tests showed that crossbeam amplitude reduces by 86. 74% and 84. 47%, respectively in uninterrupted acceleration mode and high-speed start-stop mode, so the dynamic balance method-based active vibration reduction structure can have a significant effect on suppressing crossbeam torsional vibration of pneumatic needle punching massive transfer device, and have important significance for improving accuracy of massive transfer.