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介绍了一种安装在旋翼桨毂上的主动式吸振器。针对该吸振器中偏心质量块的运动特点,选用直流电机作为驱动器,建立了主动式桨毂吸振器的仿真模型,对其原理进行了研究。以输出力变化幅值及电机需用功率为目标,在吸振器输出力状态改变的情况下,对其过渡阶段角速度进行了优化。在此基础上对一个主动式桨毂吸振器的输出力过渡过程进行了仿真分析,结果表明该控制算法可在较短时间内完成过渡过程,并且最终能够达到减小桨毂振动载荷的要求。
An active vibration absorber mounted on the rotor hub is introduced. In view of the movement characteristics of the eccentric mass in this vibration absorber, DC motor was chosen as the actuator. The simulation model of the active hub vibration absorber was established and its principle was studied. Taking the amplitude of the output force and the required power of the motor as a target, the angular velocity of the transition phase is optimized under the condition that the output force of the vibration absorber changes. On this basis, the output force transient process of an active hub absorber is simulated. The results show that the control algorithm can finish the transition process in a short time and finally reduce the vibration load of the hub.