Rolling bearing-suspended spindle run-out control using repetitive control and adaptive feedforward cancellation
Rolling bearing-suspended spindle run-out control using repetitive control and adaptive feedforward cancellation
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使用重复控制和自适应前馈取消的滚动轴承悬挂主轴跳动控制
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
Sun
中科院分区：
文献类型：
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作者：
Jonghyun Kim;Su Zhao;G. Kim;Sun
表面的润湿性、摩擦力、粘附力和光学特性受其微观形貌的影响。反过来，可以通过控制安装在主轴上的切削刀具的轨迹来确定表面微观形貌的特征。然而，这种方法受到刀具的切削精度的限制，而刀具的切削精度又受到主轴跳动误差和热行为的限制。在这项工作中，一个电磁执行器（EMA）安装在主轴端部，以补偿主轴跳动误差和热位移的真实的时间。主轴系统模型包括一个交叉耦合的刚度和阻尼项的球轴承。重复控制器（RC）减少了重复跳动（RRO），而自适应前馈抵消（AFC）减少了非重复跳动（NRRO）。该控制系统采用零相位误差跟踪控制器（ZPETC）来补偿其总相位延迟。实验结果表明，在6,000 rpm和12,000 rpm的转速下，跳动误差减少了70%。径向热位移在1 µm范围内调节3小时以上。
The wettability, friction, adhesion, and optical characteristics of a surface are affected by its micro-topography. In turn, the characteristics of a surface micro-topography can be determined by controlling the trajectory of a cutting tool mounted on a spindle. However, this method is constrained by the tool’s cutting accuracy, which is limited by the run-out error and thermal behavior of the spindle. In this work, an electromagnetic actuator (EMA) is installed at the end of the spindle to compensate for the spindle run-out error and the thermal displacement in real time. The spindle system model includes a cross-coupled stiffness and damping term for the ball bearings. Repetitive controller (RC) reduces the repeatable run-out (RRO) while adaptive feedforward cancellation (AFC) reduces the non-repeatable run-out (NRRO). The control system uses a zero phase error tracking controller (ZPETC) to compensate for its total phase delay. Experimental results show a 70% reduction in run-out error at rotation speeds of 6,000 rpm and 12,000 rpm. The thermal displacement in the radial direction is regulated within a range of 1 µm for more than 3 hours.