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首页> 外文期刊>Mechanical systems and signal processing >Control of a smart electro-magnetic actuator journal integrated bearing to a common equilibrium position: A simulation study
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Control of a smart electro-magnetic actuator journal integrated bearing to a common equilibrium position: A simulation study

机译：控制智能电磁执行器轴承轴承轴承轴承为常见的均衡位置：模拟研究

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摘要

The integration of plain journal bearings (JBs) and active magnetic bearings (AMBs) has previously been introduced as an innovative bearing concept in rotating machinery, known as smart electro-magnetic actuator journal integrated bearings (SEMAJIBs). The integrated bearing system tends to exploit the advantages and eliminate the deficiencies of each individual bearing technology. However, the integration of the two bearing technologies introduces new design and control challenges, such as operating the two bearings at a common equilibrium position. The mismatch between the equilibrium positions of the two bearings consumes both bearing load capacities leading to a load sharing problem. A novel experimentally validated control scheme has been adopted in this study to eliminate this problem and to ensure the availability of the integrated bearing load capacities. The scheme introduces a low frequency periodic biasing that enables the controller to detect nonzero static force in the AMB by sensing rotor motion at the bias carrier frequency. Consequently, the AMB controller can modify its magnetic center to match the JB equilibrium position resulting in zero static force in the AMB. Additionally, the control scheme permits the conventional control of AMBs to overcome JBs instabilities. The effectiveness of the control scheme has been demonstrated through numerical simulations using a Jeffcott rotor model supported on a pair of SEMAJIBs, for both stable and unstable operating regimes of the rotor.
机译：以前在旋转机械中被引入了纯轴颈轴承（JBS）和主动磁性轴承（AMB）的集成，称为智能电磁执行器轴承轴承（Semajibs）。综合轴承系统倾向于利用优势，消除每个轴承技术的缺陷。然而，两种轴承技术的整合引入了新的设计和控制挑战，例如在公共平衡位置操作两个轴承。两个轴承的平衡位置之间的不匹配消耗了导致负载共享问题的轴承负载能力。本研究采用了一种新型的实验验证的控制方案，以消除该问题，并确保集成轴承负载能力的可用性。该方案引入了低频周期偏置，使得控制器通过在偏压载波频率上传感转子运动来检测AMB中的非零静力。因此，AMB控制器可以修改其磁中心以匹配JB平衡位置，从而在AMB中导致零静力。另外，控制方案允许传统的AMB控制以克服JBS稳定性。通过使用支撑在一对Semajib上的Jeffcott转子模型的数值模拟已经证明了控制方案的有效性，用于转子的稳定和不稳定的操作制度。

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