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提出一种基于振动识别的主动电磁轴承转子系统不平衡补偿控制方法。该方法的最大特点是能够不依赖控制对象的传递函数,在线识别出转子等效不平衡质量的大小和位置,然后根据识别结果计算出精确的控制信号,迫使转子绕其几何轴旋转。当转子转速变化时,尽管不平衡力随之变化,但不平衡质量的大小和相位特性不会改变,因此无需重新识别不平衡量,大大提高了在变转速情况下对转子不平衡的控制性能,同时减轻了控制器的计算负担。对算法的控制效果进行了实验测试,结果表明提出的对转速不敏感的基于振动识别的主动电磁轴承转子系统不平衡补偿控制方法对不平衡振动的抑制取得了很好的效果,并在转速变化情况下能大幅减少重新识别不平衡量的次数。
An imbalance compensation control method of active electromagnetic bearing rotor system based on vibration identification is proposed. The most prominent feature of this method is that it can recognize the size and position of the equivalent unbalance mass of the rotor online without depending on the transfer function of the control object and then calculate the precise control signal according to the recognition result to force the rotor to rotate around its geometric axis. When the rotor speed changes, although the unbalance force changes along with it, but the size and phase characteristics of the unbalanced mass will not change, so there is no need to re-identify the unbalance, which greatly improves the rotor unbalance control performance under variable speed, While reducing the controller’s computational burden. The experimental results show that the method proposed in this paper is not sensitive to rotational speed, and the method of unbalance compensation for active electromagnetic bearing rotor system based on vibration identification achieves good results. When the speed variation The number of cases in which unbalances are re-identified can be significantly reduced.