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Modal Scheduling and Switching Systems

机译:模态调度与交换系统

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This paper defines a modal scheduling method for obtaining reduced order systems. In contrast to most order reduction schemes for linear structural systems, the methodology in this paper introduces a switched system to achieve order reduction. The switched system model is based on modal participation factors calculated from an input forcing function and the initial conditions at each switching time. Stability of the reduced order model is discussed, and necessary conditions for stability of the proposed switched model are derived. A numerical example that considers a flexible beam provides a testbed for the study of mode switching. The transient response in the testbed example is constructed such that it oscillates between two distinct subspaces. Numerical experiments show that an error indicator based on modal participation factors provides an effective switching strategy.
机译:本文定义了一种用于获得降阶系统的模态调度方法。与线性结构系统的大多数降阶方案相比,本文中的方法引入了一种切换系统来实现降阶。开关系统模型基于从每个开关时间的输入强迫函数和初始条件计算得出的模态参与因子。讨论了降阶模型的稳定性,并推导了所提出的切换模型的稳定性的必要条件。一个考虑柔性梁的数值示例为研究模式切换提供了一个试验平台。在测试台示例中,瞬态响应被构造为使其在两个不同的子空间之间振荡。数值实验表明,基于模态参与因子的误差指标提供了一种有效的切换策略。

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