Sliding Mode Control of Flexible Rotor-Magnetic Bearing Systems Using Robust Reduced-Order VSS Observer.
Sliding Mode Control of Flexible Rotor-Magnetic Bearing Systems Using Robust Reduced-Order VSS Observer.
复制标题
使用鲁棒降阶 VSS 观测器对柔性转子磁力轴承系统进行滑模控制。
DOI：
10.1299/kikaic.60.897
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
H. Tian
中科院分区：
文献类型：
--
作者：
K. Nonami;H. Tian
本文研究具有三个集中质量的柔性转子-磁轴承系统。采用有限元法推导了自由-自由状态下柔性转子的数学模型。通过消除高阶模态，推导出用于控制系统设计的降阶模型。本文设计了三种降维观测器。我们已经证实，VSS降阶观测器具有更大的鲁棒性参数变化的系统。利用滑模控制理论设计了该降阶模型的滑模控制器，并对计算模型在离地和旋转两种情况下进行了仿真。两个不稳定的刚性模式可以很容易地控制，具有良好的稳定性，并不会出现由高阶模式引起的溢出现象。此外，很明显，滑模控制设计相对于模型参数变化和外部干扰是鲁棒的。
This paper deals with the flexible rotor-mangetic bearing system (FR-MBS) which has three concentrated masses. A mathematical model of the flexible rotor in the case of free-free condition is derived using a finite-element method. The reduced-order model is derived for control system design by eliminating higher-order modes. Three kinds of reduced-order observers have been designed in this paper. We have confirmed that the VSS reduced-order observers have greater robustness to parameter variations in the system. The sliding mode controller for this reduced-order model is proposed using sliding mode control theory, and the simulations are done on the calculating model in the two cases of the lift-off and rotations. The two unstable rigid modes can be easily controlled with good stability and the spillover phenomena caused by the higher-order modes do not occur. Moreover it is clear that the sliding mode control design is robust with respect to model parameter variations and external disturbances.