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首页> 外文期刊>Mechatronics, IEEE/ASME Transactions on >Nonlinear Model Analysis and “Switching Model” of AC–DC Three-Degree-of-Freedom Hybrid Magnetic Bearing
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Nonlinear Model Analysis and “Switching Model” of AC–DC Three-Degree-of-Freedom Hybrid Magnetic Bearing

机译：AC-DC三自由度混合电磁轴承的非线性模型分析和“切换模型”

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摘要

The most widely studied linear models of the suspension forces in ac–dc three-degree-of-freedom hybrid magnetic bearings may not be practical for application to the precision control of bearings with larger air gaps for larger suspension forces. In addition, the simplified linear and the real nonlinear models in linear zone of current and displacements have not been compared before. In this study, the two most commonly used nonlinear models are analyzed comprehensively to address the lack of nonlinear model analysis in previous research and to seek the most appropriate model for both nonlinear and linear zones (full zone). The results show that no single model completely approximates the test results over the entire zone. A composite model, such as the “switching model,” is more accurate. To illustrate the applicability of the results to both nonlinear model analysis and the proposed “switching model,” nonlinear stiffness and performance test experiments were conducted. It is concluded that the model analysis and the proposed “switching model” can provide a control system with the most suitable mathematical models of the suspension force.
机译：交流-直流三自由度混合磁轴承中悬架力的线性模型研究最为广泛，可能不适用于具有较大气隙的悬架力较大的轴承的精密控制。此外，以前没有比较电流和位移线性区域中的简化线性模型和实际非线性模型。在本研究中，对两个最常用的非线性模型进行了综合分析，以解决先前研究中缺乏非线性模型分析的问题，并为非线性和线性区域（全区域）寻求最合适的模型。结果表明，没有单个模型可以完全近似整个区域的测试结果。诸如“切换模型”之类的复合模型更为准确。为了说明结果对非线性模型分析和建议的“转换模型”的适用性，进行了非线性刚度和性能测试实验。结论是，模型分析和提出的“切换模型”可以为控制系统提供最合适的悬架力数学模型。

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