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含双时滞轴向槽动压气体轴承-非线性转子系统的运动分析

DOI: 10.13334/j.0258-8013.pcsee.2014.35.012, PP. 6346-6354

Keywords: 非线性转子系统,轴向槽动压气体轴承,时滞,微分变换法,精细积分法,稳定性

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Abstract:

针对高速气体轴承-转子系统在主动控制过程中无法避免的时滞现象,建立了含有双时滞控制的三轴向槽动压气体轴承-转子系统的动力学模型。运用微分变换法求解动压气体润滑的Reynolds方程,得到了非线性气膜压力分布。基于精细积分法,构造了时滞非线性轴承-转子系统动力响应的求解方法。针对含有双时滞控制的气体轴承-转子系统,运用轨迹图、时间历程图等研究了系统的非线性响应,分析了时滞量和反馈控制增益对系统响应的影响。数值结果表明,当选取的反馈控制增益与气体轴承-转子系统的时滞量相匹配时,时滞系统的振动幅值会变小,运动将更加稳定,达到了较好的控制效果。

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