双机振动系统的自同步过程分析与试验研究

Self-Synchronous Process Analysis and Experiment Investigation of Vibration System Driven by Two Motors

以双机反向回转驱动振动系统为研究对象,将两电机的转速与激振器间的相位差作为指标对双机驱动振动系统的自同步过程进行分析与试验研究.通过对比相位差的变化发现电机部分对自同步过程的影响最为重要,其次是激振器部分,最后为振动体部分.仿真与试验结果表明:两激振器的初始相位差和两电机的初始转速对实现双机的自同步运动几乎没有影响;在满足同步性条件时,不同供电频率的两电机可以实现同步;当两激振器质量不同时,质量大的激动器相位落后质量小的激动器;当两激振器回转中心至机体质心距离不等时,距离大的激振器相位落后距离小的激振器;可通过调节电机供电频率来减小由电机参数、激振器质量及电机安装位置等内部扰动导致的相位差,使双机实现同步运动.

The self-synchronous process of a vibration system driven by two exciters rotating oppositely was investigated by simulation and experiment. The rotational velocities of the two motors and phase differences between the two exciters were chosen as indexes to represent for the self-synchronous process. By comparing the changes of the phase difference,the most important influence factor of the phase difference is motor,and the second is exciter,while the last one is the vibration rigid. The simulation and experimental results showthat the initial phase difference between the two exciters and the initial velocities of the two motors have no effect on the self-synchronization. When the synchronous condition is satisfied, the two motors can achieve synchronous motion with different power supply frequencies. When change the masses of the two exciters,the phase of the bigger mass lags behind the smaller one. When the distances between the rotary centers of the two exciters and the mass center of the vibration rigid body are different,the phase of the bigger distance lags behind the smaller one. The phase difference can be reduced by adjusting the power supply frequency,which are caused by motor parameters,the mass of exciters,and the motor installation position and so on.