Unbalance Compensation by Recursive Seeking Unbalance Mass Position in Active Magnetic Bearing-Rotor System
Unbalance Compensation by Recursive Seeking Unbalance Mass Position in Active Magnetic Bearing-Rotor System
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DOI：
10.1109/tie.2015.2405893
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
Kejian Jiang;Chang-sheng Zhu;Liangliang Chen
中科院分区：
文献类型：
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作者：
Kejian Jiang;Chang-sheng Zhu;Liangliang Chen
在主动磁轴承-转子系统中，为了提高转子的旋转精度，需要对转子进行不平衡补偿。提出了一种根据转子不平衡质量的实时位置产生控制信号的方法来实现不平衡补偿。与不平衡力不同，不平衡质量的大小和位置是转子的固有特性，与转子转速无关。当转子速度变化时，不平衡质量位置不需要连续和频繁地重新计算。这将大大降低计算成本。此外，为了避免信号扰动，该方法的搜索步长为常数，使得控制能够进一步稳定收敛。仿真分析了在不同不平衡相位、不同搜索步长和不同噪声水平下的控制性能。实验结果表明，该方法对转子振动具有良好的抑制效果.此外，该方法还有利于降低计算量，适合于变速运算。
In active magnetic bearing-rotor systems, unbalance compensation is used to force the rotor to spin around its geometric axis for better rotary precision. A method, which produces the control signal according to the real-time position of the rotor's unbalance mass, is proposed to actualize the unbalance compensation. Unlike the unbalance force, the unbalance mass' magnitude and position are the inherent property of the rotor and independent of the rotor speed. While the rotor speed is varying, the unbalance mass position needs not to be recalculated continuously and frequently. It will significantly reduce the computational cost. Additionally, the seeking step size in the proposed method is a constant in order to avoid the signal disturbance, so that the control can achieve the further steady-going convergence. The control performance in the condition with different unbalance phases, different seeking step sizes and different noise levels are analyzed in simulations. The experiments indicate that the proposed method achieves the good effectiveness to suppress the rotor vibration. Furthermore, it is of benefit to reducing the computational cost and suitable for application in the varying-speed operation.