通过控制伺服电机输出变角速度规律,设计并制造了伺服电机驱动的结晶器非正弦振动样机,建立了系统的弹性动力学模型,推导了系统运动学微分方程,分析了系统的固有频率及振型。结果表明:系统的固有频率和振型都随偏心轴的角度变化而周期变化,而与波形偏斜率和频率变化无关,在线调节频率和波形偏斜率时有利于系统的平稳运行。 By controlling the variable angular velocity of the servo motor, a non-sinusoidal vibration prototype driven by a servo motor is designed and manufactured. The elastic dynamics model of the system is established. The differential equation of the system is deduced. The natural frequencies and mode shapes of the system are analyzed. . The results show that both the natural frequency and the mode shapes of the system vary periodically with the angle of the eccentric shaft. However, it is not conducive to the skewness and frequency variation of the waveform. It is beneficial to the smooth operation of the system when the frequency and waveform skew rate are adjusted online.